Address:                                                                                

            Department of Biology, University of Regina, Regina, SK, Canada S4S 0A2. Phone (306) 585 4253; FAX (306) 337 2410
email  Peter.Leavitt at uregina.ca

 

Personal:

            b. Montreal, Quebec, Canada. 11 Oct 1958; Canadian citizen.

 

Education:

            Ph.D. 1989, Aquatic Biology, University of Notre Dame, Notre Dame, Indiana, USA.

            M.Sc. 1985, Limnology, Queen's University, Kingston, Ontario, Canada

            B.Sc. 1981, Biology, Honours, 1st class, Queen's University, Kingston, Ontario, Canada.

Research Experience:

            Canada Research Chair in Environmental Change and Society (Tier I), University of Regina, Regina, Saskatchewan.  (2003-2010).

            Center Fellow. National Center for Ecological Analysis and Synthesis, University of California-Santa Barbara, Santa Barbara, California (2007).

            Professor. Department of Biology, University of Regina, Regina, Saskatchewan. (2001-present).

            Director. Environmental Quality Analysis Laboratory, University of Regina, Regina, Saskatchewan. (2000-present).

            Visiting Scholar. Department of Zoology, University of Washington, Seattle, Washington. (2000)

            Associate Professor. Department of Biology, University of Regina, Regina, Saskatchewan. (1997-2001).

            Assistant Professor. Department of Biology, University of Regina, Regina, Saskatchewan. (1993-1997).

            NSERC Research Fellow. Department of Zoology, University of Alberta, Edmonton, Alberta.  Supervisor: D.W. Schindler (Jan. 1991-July 1993)

            Visiting Fellow. Freshwater Institute, Winnipeg, Manitoba. Supervisor: R. Hesslein. (Jan-July 1990).

            Postdoctoral Researcher. Center for Limnology, University of Wisconsin-Madison, WI.  Supervisor: S.R. Carpenter (1989-1991).

           

Research Interests:

            Human impacts on environment; Ecosystem variability; Regulation of food-web structure; Paleolimnology; Regulation of primary production; Limnology; Environmental change; Climate change; Disturbance.

 

Teaching Experience:

            Lecturer:           Biology 101 - General Biology (Regina)

                                    Biology 276 – Environmental Biology (Regina)

                                    Biology 335 - Limnology (Regina)           

                                    Biology 364 - Nonvascular Plants/Biology of Algae (Regina)

                                    Biology 835 – Climate Change and Impacts (Regina)

                                    Biology 837 - Practical Analysis of Plant Pigments (Regina)

                                    Biology 837 - Food-web Ecology (Regina)

                                    Botany 491 - Practical Analysis of Plant Pigments (Alberta).

            Guest Lecturer:

                                    Biology 803 - Scientific Research Skills (Regina

                                    Biology 455 – Developmental Endocrinology (Regina)

                                    Biology 375 - Systems Ecology (Regina)

                                    Biology 476 - Quaternary Ecology and Palynology (Regina)

                                    Biology 275 - Ecology (Regina)

                                    Zoology 464 - Limnology (Alberta)

                                    Zoology 322 - Community Ecology (Alberta)

                                    Botany 333 - Aquatic and Wetland Plant Ecology (Alberta).

 

Publications: 

            Selbie, D.T., B.P. Finney, D. Barto, L. Bunting, G. Chen, P.R. Leavitt, E.A. MacIsaac, D.E. Schindler, M.D. Shapley, and I. Gregory-Eaves.  2009. Ecological, landscape, and climatic regulation of sediment geochemistry in North American sockeye salmon lakes: Insights from paleoecological salmon investigations. Limnol. Oceanogr. 54: 1733-1745.

            Hill, A.C., J.A. Stanford, and P.R. Leavitt. 2009. Recent sedimentary legacy of sockeye salmon (Oncorhychus nerka) and climate change in an ultraoligotrohic, glacially-turbid British Columbia nursery lake.  Can. J Fish Aquat. Sci. 66: 1141-1152.

            Dröscher, I., A. Patoine, K. Finlay, and P.R. Leavitt. 2009. Climate control of spring clear-water phase through the transfer of energy and mass to lakes.  Limnol. Oceanogr. 54: In press.

            Finlay, K., P.R. Leavitt, B. Wissel, and Y.T. Prairie.  2009. Regulation of spatial and temporal variability of carbon flux in six hard-water lakes of the northern Great Plains.  Limnol. Oceanogr. 54: In press.

            Leavitt, P.R. S.C. Fritz, N.J. Anderson, P.A. Baker, T. Blenckner, L. Bunting, J. Catalan, D.J. Conley, , W. Hobbs, E. Jeppesen, A. Korhola, S. McGowan, K. Rühland, J.A. Rusak, G. Simpson, N. Solovieva, and J. Werne. 2009. Paleolimnological evidence of the effects on lakes of energy and mass transfer from climate and humans. Limnol. Oceanogr. 54: In press.

            Reuss, N., P.R. Leavitt, R.I. Hall, C. Bigler, and D. Hammarlund.  2009. Development and application of sedimentary pigments for assessing effects of climatic and environmental changes on subarctic lakes in northern Sweden.   J. Paleolimnol. 42: In press.

            Edlund, M. B., Engstrom, D. R., Triplett, L., Lafrancois, B. M. and  Leavitt, P. R. 2009. Twentieth-century eutrophication of the St. Croix River (Minnesota-Wisconsin, USA) reconstructed from the sediments of its natural impoundment.  J. Paleolimnol 42:641-657.

            Xenopoulos, M.A., P.R. Leavitt, and D.W. Schindler. 2009. Ecosystem-level regulation of boreal lake phytoplankton by ultraviolet radiation.  Can. J. Fish. Aquat. Sci. 66: In press.

            Pham, S.V., P.R. Leavitt, S. McGowan, B. Wissel, and L. Wassenaar.  2009. Spatial and temporal variability of prairie lake hydrology as revealed using stable isotopes of hydrogen and oxygen.  Limnol. Oceanogr.  54: 101-118. 

            McGowan, S., and P.R. Leavitt. 2008. The role of paleoecology in whole-ecosystem science.  p. XX-YY, In Miao, S., S. Carstenn, and M. Nungesser (eds.), Real World Ecology: Large-scale and Long-term Case Studies and Methods. Springer.        

            Wolfe, B.B., R.I. Hall, T.W.D. Edwards, S.R. Vardy,M.D. Falcone, C. Sjunneskog, F. Sylvestre,  S. McGowan, P.R. Leavitt, and P. van Driel.  2008. Hydroecological responses of the Athabasca Delta, Canada, to changes in river flow and climate during the 20^th century.  Ecohydrology 1: 131-148.

            Hambright, K.D., T. Zohary, W. Eckert, S.S. Schwartz, C.L. Schelske, K.R. Laird, and P.R. Leavitt.  2008. Exploitation and destabilization of a warm, freshwater ecosystem through engineered hydrological change.   Ecol. Applic. 18: 1591-1603.

            Finlay, K., B. Wissel, and P.R. Leavitt. 2008. Spatial and temporal synchrony of pCO₂ in six hardwater lakes of central Canada.  Verh. Internat. Verein. Limnol. 30: In press.     

            Pham, S.V., P.R. Leavitt, S. McGowan, and P. Peres-Neto.  2008. Spatial variability of climate and land use effects on lakes of the northern Great Plains. Limnol. Oceanogr. 53: 728-742.

            Patoine, A., and P.R. Leavitt. 2008. Landscape analysis of the role of N₂ fixation in satisfying algal demand for N in eutrophic lakes.  Verh. Internat. Verein. Limnol. 30: 366-370.

            Dröscher, I., K. Finlay, A. Patoine, and P.R. Leavitt. 2008. Daphnia control of the spring clear-water phase  in six polymictic lakes of varying productivity and size. Verh. Internat. Verein. Limnol. 30: 186-190.

            McLauchlan, K.K., J.M. Craine, W. Oswald, P.R. Leavitt, and G.E. Likens. 2007. Changes in nitrogen cycling during the past century in a northern hardwood forest. Proc. Nat. Acad. Sci. 104: 7466-7470.

            Michels, A., K.R. Laird, S.E. Wilson, D. Thomson, P.R. Leavitt, R.J. Oglesby, and B.F. Cumming.  2007. Multi-Decadal to millennial-scale shifts in drought conditions on the Canadian Prairies over the past six millennia: Implications for future drought assessment. Global Change Biol. 13: 1295–1307.

            Brock, C.S., P.R. Leavitt, D.E. Schindler, and P.D. Quay.  2007. Regulation of algal production in salmon nursery lakes by marine-derived nutrients and climate during the past 300 years. Limnol. Oceanogr. 52: 1588-1598.

            Wyn, B., J. Sweetman, P.R. Leavitt, and D.B. Donald.  2007. Historical metal concentrations in lacustrine food webs revealed using fossil ephippia from Daphnia spp.  Ecol. Applic. 17: 754-764.

            Bunting, L., P.R. Leavitt, C.E. Gibson, E.J. McGee, and V.A. Hall.   2007. Degradation of water quality in Lough Neagh, Northern Ireland, by diffuse nitrogen flux from a phosphorus-rich catchment.   Limnol. Oceanogr. 52: 354-369.

            Wolfe, B.B., T.L. Karst-Riddoch, R.I. Hall, T.W.D. Edwards, M.C. English, R. Palmini, S. McGowan, P.R. Leavitt and S.R. Vardy.  2007.  Classification of hydrologic regimes of northern floodplain basins (Peace-Athabascana Delta, Canada) from analysis of stable isotopes (d¹⁸O, d²H) and water chemistry.  Hydrol. Proces. 21: 151-168.

            Schindler, D.E., P.R. Leavitt, S.P. Johnson, and C.S. Brock.  2006. A five hundred year context for the r+ecent surge in sockeye salmon abundance in the Alagnak River, Alaska.  Can. J. Fish. Aquat. Sci. 63: 1439-1444.

            Leavitt, P.R., C.S. Brock, C. Ebel, and A. Patoine. 2006. Landscape-scale effects of urban nitrogen on a chain of freshwater lakes in central North America.  Limnol. Oceanogr. 51: 2262-2277.

            Brock, C.S., P.R. Leavitt, D.E. Schindler, S.P. Johnson and J.W. Moore.   2006. Spatial variability of stable isotopes and fossil pigments in surface sediments of Alaskan coastal lakes: Constraints on quantitative estimates of past salmon abundance.  Limnol. Oceanogr. 51: 1637-1647.

             Patoine, A., M.D. Graham and P.R. Leavitt.  2006. Spatial variation of nitrogen fixation in lakes of the northern Great Plains.  Limnol. Oceanogr. 51: 1665-1677.

            Patoine, A. and P.R. Leavitt.  2006. Century-long synchrony of algal fossil pigments in a chain of Canadian prairie lakes.   Ecology 87: 1710-1721.

            Engstrom, D.R., S.P. Schottler, P.R. Leavitt and K.E. Havens.  2006. A re-evaluation of the cultural eutrophication of Lake Okeechobee, Florida, using multiproxy sediment records.  Ecol. Applic. 16: 1194-1206.

            Steinman, A.D., G.A. Lamberti, and P.R. Leavitt. 2006. Biomass and pigments of benthic algae.  P. 357-379, F.R. Hauer and G.A. Lamberti (Eds) Methods in Stream Ecology.  2^nd edition.  Academic Press.  877 pp.

            Battarbee, R.W., N.J. Anderson, E. Jeppesen, and P.R. Leavitt.  2005. Combining palaeolimnological and limnological approaches in assessing lake ecosystem response to nutrient reduction.  Freshwat. Biol. 50: 1772-1780.

            Schindler, D.E., P.R. Leavitt, C. Brock, S.P. Johnson, and P.D. Quay.  2005. Marine-derived nutrients, commercial fisheries, and the production of salmon and lake algae in Alaska. Ecology 86: 3225-3231.

            Hodgson, D.A., W. Vyverman, E. Verleyen, P.R. Leavitt, K. Sabbe, A.H. Squier and B.J. Keely.  2005. Late Pliestocene record of elevated UV radiation in an Antarctic lake. Earth Planet. Sci.Lett.   236: 765-772.

            McGowan, S., A. Patoine, M.D. Graham and P.R. Leavitt.  2005. Intrinsic and extrinsic controls of lake phytoplankton synchrony.  Verh. Internat. Verein. Limnol. 29: 794-798.

            Bunting, L., P.R. Leavitt, V. Hall, C.E. Gibson and E.J. McGee. 2005. Nitrogen degradation of water quality in a phosphorus-saturated catchment: The case of Lough Neagh, Northern Ireland. Verh. Internat. Verein. Limnol. 29: 1005-1010. 

            McGowan, S., P.R. Leavitt, R.I. Hall, N. J. Anderson, E. Jeppesen, and B.V. Odgaard. 2005. Controls of algal abundance and community composition during ecosystem state change.  Ecology 86: 2200-2211.

            Körner, C. and 30 co-authors.  2005. Mountain Systems. Chapter 24 in: Millennium Ecosystem Assessment, 2005.   Current State and Trends: Findings of the Condition and Trends Working Group.  Ecosystems and Human Well-being, vol.1., Island Press, Washington DC.

            Patoine, A., M.D. Graham, P.R. Leavitt and R. Hesslein. 2005. Landscape-scale pattersn of nitrogen fixation by cyanobacteria.  Verh. Internat. Verein. Limnol. 29: 359-364.

            Vinebrooke, R.D., and P.R. Leavitt.  2005.  Mountain lakes as indicators of the cumulative impacts of ultraviolet radiation and other global stressors.  p. 497-510, In Huber, U. (ed.) Global Change and Mountain Regions – A State of Knowledge Review.

            McGowan, S., P.R. Leavitt and R.I. Hall. 2005.  A whole-lake experiment to determine the effects of winter droughts on shallow lakes.  Ecosystems 7: 694-708.

            Malot, L.A., W. Keller, P.R. Leavitt, R.D. Robarts, M.J. Waiser, M.T. Arts, T.A. Clair, R. Pienitz, N.D. Yan, D.K. McNichol, Y. Prairie, P.J. Dillon, M. Macrae, R. Bello, and R.N. Nordin. 2005. Risk analysis of UVB exposure in Canadian inland waters. Can. J. Fish. Aquat. Sci. 61: 2511-2521.

            Hambright, K.D., W. Eckert, P.R. Leavitt and C.L. Schelske. 2004. Conversion of a natural lake into a reservoir: Effects on sediment and phosphorus accumulation rates. Environ. Sci. Technol. 38: 6460-6467.

            Hodgson, D.A., W. Vyverman, E. Verleyen, K. Sabbe, P.R. Leavitt, A. Taton, A. Wilmotte, A.H. Squire, and B.J.K. Keely. 2004. Environmental factors influencing the pigment composition in in situ aquatic microbial communities under the Antarctic ozone hole.  Aquat. Microb. Ecol. 37: 247-263.

            Savage, C., P.R. Leavitt, and R. Elmgren.  2004. Distribution and retention of sewage nitrogen in surface sediments of a coastal bay.  Limnol. Oceanogr. 49: 1503-1511.

            Verleyen, E., D.A. Hodgson, P.R. Leavitt, K.. Sabbe, and W. Vyverman.   2004. Quantifying habitat-specific diatom production: a critical assessment using morphological and biochemical markers in Antarctic lake sediments.  Limnol. Oceanogr. 49: 1528-1539.

            Wakeham, S.G., J. Forrest, C.A. Masiello, Y. Gélinas, C.R. Alexander, and P.R. Leavitt. 2004.  Hydrocarbons in Lake Washington sediments – a 25- year retrospective in an urban lake.  Environ. Sci. Technol. 38: 431-439.

            Rusak, J.A., P.R. Leavitt, S. McGowan, G. Chen, O.Olson, S. Wunsam, and B. Cumming.  2004. Millennial-scale relationships of diatom species richness and production in two prairie lakes. Limnol. Oceanogr. 49: 1290-1299.

            Leavitt, P.R., B.F. Cumming, J.P. Smol, M. Reasoner, R. Pienitz, and D. Hodgson.   2003.  Climatic control of UV radiation effects on lakes.  Limnol. Oceanogr. 48: 2062-2069.

            Laird, K.R., B.F. Cumming, S. Wunsam, O. Olson, J.A. Rusak, R.J. Oglesby, S.C. Fritz, and P.R. Leavitt. 2003.  Lake sediments record large-scale shifts in moisture regimes across the northern Prairies of North America during the past two millennia.  Proc. Nat. Acad. Sci. 100: 2483-2488.            

            Donahue, W.F., M.A. Turner, D.L. Findlay, and P.R. Leavitt. 2003. The role of solar radiation in structuring the shallow benthic communities of boreal forest lakes.   Limnol. Oceanogr. 48: 31-47.

            Leavitt, P.R., D. Hodgson, and R. Pienitz. 2003.  Past UV radiation environments and impacts on lakes. p. 509-545, In Helbling, E.W. and H. Zagarese (eds.) UV Effects in Aquatic Organisms and Ecosystems. Vol 2 in Comprehensive Series in Photosciences, Vol. 2, Royal Society of Chemistry. 

            Sauchyn, D.J., E. Barrow, R.F. Hopkinson, and P.R. Leavitt.  2002. Aridity on the Canadian Prairies.  Géogr. Phys. Quat. 56: 247-259.

            Quinlan, R., P.R. Leavitt, A.S. Dixit, R.I. Hall, and J.P. Smol.  2002. Landscape effects of climate, agriculture and urbanization on benthic invertebrate communities of Canadian prairie lakes.  Limnol. Oceanogr. 47: 378-391.

            Verschuren, D. T.C. Johnson, H.J. Kling, D.N. Edgington, P.R. Leavitt, E.B. Brown, M.R. Talbot, and R.E. Hecky.  2002. History and timing of human impact on Lake Victoria, East Africa.  Proc. Roy. Soc. B. Biol. Sci. 269: 289-294.

            Schindler, D.E., R.A. Knaap, and P.R. Leavitt.  2001. Alteration of nutrient cycles and algal production resulting from fish introductions to mountain lakes.  Ecosystems: 4 308-321.

            Jeppesen, E., P.R. Leavitt, J.P. Jensen, and L. De Meester. 2001. Functional ecology and paleolimnology: Using cladoceran remains to reconstruct anthropogenic impact.  Trend Ecol. Evol. 16: 191-198.

            Leavitt, P.R., and D.A. Hodgson. 2001.  Sedimentary pigments. Pages 295-325 In: Smol, J.P., H.J.B. Birks and W.M. Last (eds.), Tracking Environmental Change using Lake Sediments. Volume 3: Terrestrial, Algal and Siliceous Indicators.  Kluwer.

            Bennett, J., B.F. Cumming, P.R. Leavitt, M. Chiu, J.P. Smol, and J. Szeicz.  2001. Diatom, pollen, and chemical evidence of post-glacial climatic change at Big Lake, south-central British Columbia, Canada. Quat. Res. 55: 332-343.

            Scully, N.M., P.R. Leavitt, and S.R. Carpenter. 2000. Century-long effects of forest harvest on the physical structure and autotrophic community of a small temperate lake.  Can. J. Fish. Aquat. Sci. 57 (Suppl. 2): 50-59.

            Cottingham, K.L, J.A. Rusak, and P.R. Leavitt.  2000.  Increased ecosystem variability and reduced predictability following fertilization: Evidence from palaeolimnology.  Ecology Letters 3: 340-348.

            Pienitz, R., J.P. Smol, W.M. Last, P.R. Leavitt, and B.F. Cumming. 2000.   Multiproxy Holocene paleoclimatic record from a saline lake in the Canadian Subarctic.  Holocene 10: 673-686.

            Blais, J.M., K. Duff, D.W. Schindler, J.P. Smol, P.R. Leavitt, and M. Agbeti. 2000.  Recent eutrophication histories in Lac Ste. Anne and Lake Isle, Alberta, Canada, inferred using paleolimnological methods.  Lake Reserv. Manage.16: 292-304.

            Dixit, A.S., R.I. Hall, P.R. Leavitt, J.P. Smol, and R. Quinlan.  2000. Effects of sequential depositional basins on lake response to urban and agricultural pollution: A paleoecological analysis of the Qu'Appelle Valley, Saskatchewan, Canada. Freshwat. Biol. 43: 319-338.

            Soranno, P.A., K.E. Webster, J.L. Riera, T.K. Kratz, J.S. Baron, P.A. Bukaveckas, G.W. Kling, D.S. White, N. Caine, R.C. Lathrop, and P.R. Leavitt. 1999. Spatial variation among lakes within landscapes: Ecological organization along lake chains.   Ecosystems 2: 395-410.

            Cuddington, K., and P.R. Leavitt.  1999. An individual-based model of pigment flux in lakes: Implications for organic biogeochemistry and paleoecology.  Can. J. Fish. Aquat. Sci. 56: 1964-1977.

            Verschuren, D., C. Cocquyt, J. Tibby, N. Roberts, and P.R. Leavitt.  1999.  Long-term dynamics of algal and invertebrate communities in a small, fluctuating tropical soda lake.   Limnol. Oceanogr. 44: 1216-1231.

            Hall, R.I., P.R. Leavitt, A.S. Dixit, R. Quinlan, and J.P. Smol. 1999.   Limnological succession in reservoirs: a paleolimnological comparison of two methods of reservoir formation. Can. J. Fish. Aquat. Sci. 56: 1109-1121.

            Leavitt, P.R., R.D. Vinebrooke, R.I. Hall, S.E. Wilson, J.P. Smol, R.E. Vance, and W.M. Last.  1999. Multiproxy record of prairie lake response to climatic change and human activity: Clearwater Lake, Saskatchewan.  Geol. Soc. Canada Bull. 354:125-138.

            Verschuren, D., J. Tibby, P.R. Leavitt, and N. Roberts.  1999. The environmental history of a climate-sensitive lake in the former 'White Highland' of central Kenya. Ambio 28: 494-501.

            Leavitt, P.R., D.L. Findlay, R.I. Hall, and J.P. Smol. 1999.  Algal responses to dissolved organic carbon loss and pH decline during whole-lake acidification: Evidence from paleolimnology.  Limnol. Oceanogr. 44: 757-773.

            Hall, R.I., P.R. Leavitt, R. Quinlan, A.S. Dixit, and J.P. Smol. 1999. Effects of agriculture, urbanization and climate on water quality in the northern Great Plains.   Limnol. Oceanogr. 43: 739-756.

            Vinebrooke, R.D., and P.R. Leavitt.  1999. Phytobenthos and phytoplankton as potential indicators of climate change in mountain lakes and ponds: a HPLC-based pigment approach. J. North Am. Benth. Soc. 18: 14-32.

            Vinebrooke, R.D., and P.R. Leavitt. 1999.  Differential responses of littoral communities to ultraviolet radiation in an alpine lake.  Ecology 80: 223-237.

            Vinebrooke, R.D., and P.R. Leavitt. 1998.  Direct and interactive effects of allochthonous dissolved organic matter, inorganic nutrients, and ultraviolet radiation on an alpine littoral food web.   Limnol. Oceanogr. 43: 1065-1081.

            Vinebrooke, R.D., R.I. Hall, P.R. Leavitt, and B.F. Cumming. 1998. Fossil pigments as indicators of phototrophic response to salinity and climatic change in lakes of western Canada.  Can. J. Fish. Aquat. Sci. 55: 668-681.

            Leavitt, P.R., R.D. Vinebrooke, D.B. Donald, J.P. Smol and D.W. Schindler.   1997. Past ultraviolet radiation environments in lakes derived from fossil pigments.  Nature 388: 457-459.

            Hall, R.I., P.R. Leavitt, J.P. Smol, and N. Zirnhelt. 1997. Comparison of diatoms, fossil pigments, and historical records as measures of lake eutrophication.   Freshwat. Biol. 38: 401-417.

            Stager, J.C., P.R. Leavitt, and S.S. Dixit.  1997. Assessing impacts of past human activity on the water quality of Upper Saranac Lake, New York.  Lake Reserv. Manage. 13: 175-184.            

            Hauer, F.R., J.S. Baron, D.H. Campbell, K.D. Fausch, S.W. Hostetler, G.H. Leavesley, P.R. Leavitt, D.M. McKnight, and J.A. Stanford. 1997.  Assessment of climate change and freshwater ecosystems of the Rocky Mountains, U.S. and Canada. Hydrol. Proces. 11: 903-924.

            Vinebrooke, R.D., and P.R. Leavitt. 1996.  Effects of UV radiation on periphyton in an alpine lake.  Limnol. Oceanogr. 41: 1035-1040.

            Paul, A.J., P.R. Leavitt, D.W. Schindler, and A.K. Hardie.  1995. Direct and indirect effects of predation by a calanoid copepod (Subgenus: Hesperodiaptomus) and nutrients in a fishless alpine lake.  Can. J. Fish. Aquat. Sci. 52: 2628-2638.

            Miskimmin, B., P.R. Leavitt, and D.W. Schindler. 1995.  Fossil record of littoral Cladocera (Chydoridae) and plant pigment response to fisheries management practises.  Freshwater Biol. 34: 177-190.

            Leavitt, P.R., D.E. Schindler, A.J. Paul, A.K. Hardie, and D.W. Schindler. 1994. Fossil pigment records of phytoplankton in trout-stocked alpine lakes.  Can. J. Fish. Aquat. Sci. 51: 2411-2423.

            Leavitt, P.R., P.R. Sanford, S.R. Carpenter, and J.F. Kitchell. 1994. An annual fossil record of production, planktivory and piscivory during whole-lake experiments.  J. Paleolimnol. 11: 133-149.

            Leavitt, P.R., B.J. Hann, J.P. Smol, B.A. Zeeb, C.C. Christie, B. Wolfe, and H.J. Kling. 1994. Paleolimnological analysis of whole-lake experiments: an overview of results from Experimental Lakes Area Lake 227.  Can. J. Fish. Aquat. Sci. 51: 2322-2332.

            Hann, B.J., P.R. Leavitt, and P.S.S. Chang. 1994.  Cladocera community response to experimental eutrophication in Lake 227 as recorded in laminated sediments.  Can. J. Fish. Aquat. Sci. 51: 2312-2321.

            Leavitt, P.R., and D.L. Findlay. 1994. Comparison of fossil pigments with 20 years of phytoplankton data from eutrophic Lake 227, Experimental Lakes Area, Ontario.   Can. J. Fish. Aquat. Sci. 51: 2286-2299.

            Leavitt, P.R. 1993. A review of factors that regulate carotenoid and chlorophyll deposition and fossil pigment abundance.  J. Paleolimnol. 9: 109-127.

            Leavitt, P.R., P.R. Sanford, S.R. Carpenter, J.F. Kitchell and D. Benkowski. 1993. Annual fossil records of food-web manipulation. Pages 278-309 In: S.R. Carpenter and J.F. Kitchell (eds.), The trophic cascade in lakes. Cambridge.

            Leavitt, P. R. 1992. An analogy for plankton interactions. Pages 483-491 In: J.F. Kitchell (ed.), Food web management: a Case study of Lake Mendota. Springer.

            Vanni, M.F., J. Temte, Y. Allen, R. Dodds, P.R. Leavitt and C. Leucke. 1992. Herbivory, nutrients and phytoplankton dynamics in Lake Mendota, 1987-1989. Pages 243-273 In: J.F. Kitchell (ed.), Food web management: a Case study of Lake Mendota. Springer.

            Pienitz, R., I. Walker, B. Zeeb, J.P. Smol and P.R. Leavitt.  1992. Biomonitoring past salinity changes in an athalassic sub-arctic lake. Internat. J. Salt Lake Res. 1: 91-123.

            Carpenter, S.R. and P.R. Leavitt. 1991. Temporal variation in a paleolimnological record arising from a trophic cascade. Ecology 72: 277-285.

            Smol, J.P., I.R. Walker and P.R. Leavitt. 1991. Paleolimnology and hindcasting climatic trends. Int. Ver. Theor. Angew. Limnol. 24: 1240-1246.

            Leavitt, P.R. and S.R. Carpenter. 1990. Aphotic pigment degradation in the hypolimnion: Implications for sedimentation studies and paleolimnology. Limnol. Oceanogr. 35: 520-534.

            Leavitt, P.R. and S.R. Carpenter. 1990. Regulation of pigment sedimentation by herbivory and photo-oxidation. Can. J. Fish. Aquat. Sci. 47: 1166-1176.

            Leavitt, P.R. and S.R. Carpenter. 1989. Effects of sediment mixing and benthic algal production on fossil pigment stratigraphies. J. Paleolimnol. 2: 147-158.

            Leavitt, P.R., S.R. Carpenter and J.F. Kitchell. 1989. Whole-lake experiments: The annual record of fossil pigments and zooplankton. Limnol. Oceanogr. 34: 700-717.

            Leavitt, P.R. and S.R. Brown. 1988. Effects of grazing by Daphnia on algal carotenoids: Implications for paleolimnology. J. Paleolimnol. 1: 201-213.

            Leavitt, P.R. 1988. Experimental determination of carotenoid degradation. J. Paleolimnol. 1: 215-227.

            Carpenter, S.R., P.R. Leavitt, J.J. Elser and M.M. Elser. 1988. Chlorophyll budgets: Response to food web manipulation. Biogeochemistry 6: 79-90.

 

Technical Paper:

            Leavitt, P.R. 1991. Practical methods for analysis of carotenoids. Department of Botany, University of Alberta. 133 pp.

 

Manuscripts under Review:

            Finlay, K., A. Patoine, D.B. Donald, M.Bogard, and P.R. Leavitt. Experimental evidence that pollution with urea can degrade water quality in phosphorus-rich lakes of the northern Great Plains. Submitted to Limnology and Oceanography, July 2009.

            Finlay, K., P.R. Leavitt, A. Patoine, and B. Wissel. Magnitudes and controls of organic and inorganic carbon flux through a chain of hard-water lakes on the northern Great Plains.  Submitted to Limnology and Oceanography, July 2009.

            Savage, C., P.R. Leavitt, and R. Elmgren.  Effects of land use, urbanization, and climate variability on coastal eutrophication in the Baltic Sea.  Revised for Limnology and Oceanography, July 2009.

            Chen, G., E. Saulnier-Talbot, D. T. Selbie, E. Brown, D.E. Schindler, L. Bunting, P.R. Leavitt, B.P. Finney, and I. Gregory-Eaves.  Salmon-derived nutrients drive diatom beta-diversity patterns in Alaskan lakes.  Submitted to Ecology, Mar 2009.

            Bunting, L. P.R. Leavitt, R.P. Weidman, and R.D. Vinebrooke. Regulation of the nitrogen biogeochemistry of mountain lakes by subsidies of terrestrial dissolved organic matter and the implications for climate studies.  Submitted to Limnology and Oceanography, May 2009.

        

Published Abstracts (* = invited)

         McLaughlan, K.K., and P.R. Leavitt. Ecosystem response to changes in climate and vegetation during the Holocene: Sediment records from Deming Lake, Minnesota, USA.   Association of American Geographers. Las Vegas, NV, 2009.

           Donald, D.B, K. Finlay, M.J. Bogard, and P.R. Leavitt. Impacts of urea on phosphorus rich lakes of the Northern Great Plains.  American Society of Limnology and Oceanography. Nice, France, 2009.

           Bogard, M.J., R. Cooper, D.B. Donald, K. Finlay, and P.R. Leavitt. Spatial and predictive patterns of urea occurrence in lakes of the northern Great Plains. Society of Canadian Limnologists. Ottawa, Canada, 2009.

           Finlay, K.  P.R. Leavitt, and A. Patoine. Impacts of urea pollution to lakes of the Northern Great Plains. Society of Canadian Limnologists. Ottawa, Canada, 2009.

        *Leavitt, P.R. Mechanisms and patterns of climate effects on lakes of the northern Great Plains.   North American Lake Management Society 2008 Symposium. Plenary speaker. Lake Louise, Canada, 2008.

           *Leavitt, P.R.  Degradation of lake ecosystems by urban and agricultural nitrogen.  Lake Winnipeg Red Zone Symposium.  Plenary speaker. Winnipeg, Canada, 2008.

            *Leavitt, P.R.  Paleolimnological evidence of the effects on lakes of energy and mass transfer from climate and humans.  American Geophysical Union Chapman Conference on Lakes and Reservoirs as Sentinels, Integrators, and Regulators of Climate Change. Incline Village, USA, 2008.

           *Leavitt, P.R.. Degradation of lake ecosystems by anthropogenic nitrogen: A new paradigm for future lake eutrophication.  American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

           Finlay, K., and P.R. Leavitt. Inorganic and organic carbon sequestration in lakes of the northern Great Plains. American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

           Bunting, L., P.R. Leavitt, D.E. Schindler, B.P. Finney, I. Gregory-Eaves, D.T. Selbie, G. Chen, M.G. Pellatt, and D. G. Bos. Continental gradients in the effects of marine-derived nutrients from salmon on lake primary production. American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

           Phillips, I.D., G. McMaster, and P.R. Leavitt. New approaches to prairie bio-monitoring: Incorportating nitrogen stable isotopes with community analysis for source and consequence in watershed management. American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

           Wissel, B., P.R. Leavitt, R.N. Cooper, and S.V. Pham. Environmental controls of food-web structure in prairie lakes. American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

           Dröscher, I., A. Patoine, K. Finlay, and P.R. Leavitt. Climate control of spring clear-water phase development through the transfer of energy and mass to lakes. American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

           McGowan, S., P.R. Leavitt, P. Barker, E. Turner, and S. Maberly. Improved assessment of cultural eutrophication using limnological and paleolimnological records from Lake Windermere. American Society of Limnology and Oceanography. St. John’s, Canada, 2008.

Patoine, A., and P.R. Leavitt. Relative importance of climate, food-web structure, and water chemistry as controls of inter-annual variability in landscape patterns of nitrogen fixation. International Association of Theoretical and Applied Limnology.  Montreal, Canada, 2007.

Selbie, D.T., I. Gregory-Eaves, L. Bunting, G. Chen, P.R. Leavitt, D.E. Schindler, J.P. Smol, and B.P. Finney. Long-term spatial and temporal variability in north Pacific salmon production: relationships to large-scale environmental drivers.  International Association of Theoretical and Applied Limnology.  Montreal, Canada, 2007.

Hampton, S. S. Fradkin, E. Seminet-Reneau, and P.R. Leavitt. Disproportionate importance of nearshore habitat in a large oligotrophic lake. International Association of Theoretical and Applied Limnology.  Montreal, Canada, 2007.

Finlay, K., and P.R. Leavitt.  Climatic effects on CO₂ flux in hardwater prairie lakes.  International Association of Theoretical and Applied Limnology.  Montreal, Canada, 2007.

Dröscher, I., P.R. Leavitt, A. Patoine, and K. Finlay. Climate regulation of spring clear-water phase within a lakes chain of prairie lakes: Unique pathways of hydrology and temperature.  International Association of Theoretical and Applied Limnology.  Montreal, Canada, 2007.

Chen, G., I. Gregory-Eaves, D.T. Selbie, J., Sweetman, B.P. Finney, D.E. Schindler, L. Bunting, and P.R. Leavitt.  Zooplankton responses to salmon-derived nutrients in the northeast Pacific – a paleolimnological perspective. International Association of Theoretical and Applied Limnology.  Montreal, Canada, 2007.

Finlay, K, and P.R. Leavitt. Carbon flux in prairie lakes.  Canadian Society of Ecology and Evolution. Toronto, Canada, 2007.

*Leavitt, P.R. Degradation and destabilization of freshwater ecosystems by anthropogenic  nitrogen: A new paradigm for future lake eutrophication. F.H. Rigler Memorial Award Lecture. Society of Canadian Limnologists. Montreal, Canada, 2007. 

Selbie, D.T., L. Bunting, G. Chen, I. Gregory-Eaves, P.R Leavitt, D.E. Schindler, and B.P. Finney. Mid to late Holocene trends in northern pacific salmon production. Society of Canadian Limnologists. Montreal, Canada, 2007.

Wissel, B., R. Cooper, S. Deitrich, and P.R. Leavitt.  Environmental controls of food web structure and energy flow in saline prairie lakes.  Society of Canadian Limnologists. Montreal, Canada, 2007.

Chen, G., D.T. Selbie, I. Gregory-Eaves, B.P. Finney, L. Bunting, P.R. Leavitt, and D.E. Schindler. Tracking the history of Pacific salmon populations and related trophic dynamics over the past ~5000 years using multi-proxy paleolimnological techniques.  Society of Canadian Limnologists. Montreal, Canada, 2007.

*Leavitt, P.R. Change, chance and causation: New approaches to quantify ecosystem variability in the 21^st century.  US Long-term Ecological Research Network, All Scientists Meeting. Estes Park, CO, USA, 2006.

           Bunting, L., P.R. Leavitt, C.E. Gibson, E.J. McGee, and V.A. Hall. Degradation of water quality in Lough Neagh, Northern Ireland, by diffuse nitrogen flux from a phosphorous-rich catchment.  10^th International Paleolimnology Symposium. Duluth, MN, USA, 2006.

           *Leavitt, P.R. Degradation and destabilization of freshwater ecosystems by diffuse and urban sources of nitrogen. Plenary speaker.  10^th International Paleolimnology Symposium. Duluth, MN, USA, 2006.

           Levine, S.N., A. Lini, P.R. Leavitt, L. Bunting, D.M. Dahlen, H.D. Burgess, and M.L. Ostrofsky.  Trophic status of Lake Champlain over 400 years of changing land use: III Biological Indicators. 10^th International Paleolimnology Symposium. Duluth, MN, USA, 2006.

           McGowan, S., P.R. Leavitt, P. Barker, E. Turner, and S.C. Maberly.   Cultural eutrophication of Lake Windermere during the Victorian era: Comparison of limnological and palaeolimnological records. 10^th International Paleolimnology Symposium. Duluth, MN, USA, 2006.

           Sanford, P.R., and P.R. Leavitt. A cladoceran microfossil analysis of lake response to sewage input, nutrient diversion and subsequent lake basin developments. 10^th International Paleolimnology Symposium. Duluth, MN, USA, 2006.

           Vereyen, E., D.A. Hodgson, K. Sabbe, P.R. Leavitt, A.H. Squier, B.J. Keely, and W. Vyverman.  The reconstruction of past changes in ultraviolet radiation using diatoms and fossil algal pigments in antarctic lake sediments. 10^th International Paleolimnology Symposium. Duluth, MN, USA, 2006.

           Patoine, A., B. Matthews, and P.R. Leavitt. Inter-annual variation in nitrogen fixation and utilization by aquatic food webs: A Landscape perspective. American Society of Limnology and Oceanography.  Victoria, Canada, 2006.

           S. McGowan, T. Barker, K. Hatton, P.R. Leavitt, B. Moss, and M. O’Connor.  Contrasting impacts of nitrogen and salinity enrichment on algal community composition and biomass in shallow pond mesocosms.  American Society of Limnology and Oceanography.  Victoria, Canada, 2006.

           Leavitt, P.R., S. Wunsam, J.A. Rusak, S.C. Fritz, B.F. Cumming, K.R. Laird, and A. Michels. Regulation of lake structure and function by jet-stream movement over the northern Great Plains. American Society of Limnology and Oceanography.   Victoria, Canada, 2006.

           Hill, A.C., J.A. Stanford, P.R. Leavitt, and L.L. Bahls.  Sedimentary legacy of sockeye salmon returns to an ultra-oligotrophic lake in coastal B.C.: Coherence with conventional and traditional ecological knowledge. American Society of Limnology and Oceanography.  Victoria, Canada, 2006.

           Deitrich, S.V., P.R. Leavitt, S. McGowan, and B. Wissel.  Spatial and temporal variability of lake response to climate: New approaches using stable isotopes of H and O. American Society of Limnology and Oceanography.   Victoria, Canada, 2006.

           Bunting, L., P.R. Leavitt, C.E. Gibson, E.J. McGee, V.A. Hall, and D.R. Engstrom.  Effects of diffuse sources of nitrogen on water quality and cyanobacterial abundance.  American Society of Limnology and Oceanography.  Victoria, Canada, 2006.

           Brock, C.S., P.R. Leavitt, D.E. Schindler, and P.D. Quay.  Regulation of algal and salmon production in coastal Alaskan lakes by marine derived nutrients and climate.  American Society of Limnology and Oceanography.  Victoria, Canada, 2006.

        *Leavitt, P.R., C.S. Brock, C. Ebel and A. Patoine.  Landscape-scale effects of urban nitrogen on a changing of freshwater lakes in central North America.  Integrated Water Resources Management Workshop, Canadian Water Resources Association-Saskatchewan Network of Watershed Stewards.  Regina, Canada, 2006.

           Leavitt, P.R., C.S. Brock, D.E. Schindler, S.P. Johnson and P.D. Quay. Regulation of Salmon Nursery Lake Production by Marine Derived Nutrients and Climate during the Past 1000 Years.  Society of Canadian Limnologists.  Calgary, Canada, 2006.

           Dietrich, S. S. McGowan, and P.R. Leavitt.  A Quantitative Analysis of Lake Relative Sensitivity to Variations in Climate and Land-use Practices.  Society of Canadian Limnologists.  Calgary, Canada, 2006.

           McGowan, S., T. Barker, K. Hatton, P.R. Leavitt, B. Moss and M. O’Connor.  Effects of nitrogen and salinity enrichment on algal community composition and biomass in shallow pond mesocosms.  Society of Canadian Limnologists.  Calgary, Canada, 2006.

           Patoine, A., and P.R. Leavitt.  Nitrogen fixation by cyanobacteria: Landscape-scale patterns and importantce to the invertebrate food web.  Society of Canadian Limnologists.  Calgary, Canada, 2006.

            Leavitt, P.R., C.S. Brock, D.E. Schindler, S.P. Johnson and P.D. Quay. Regulation of Salmon Nursery Lake Production by Marine Derived Nutrients and Climate during the Past 1000 Years. Fisheries and Climate Conference, C-CAIRN Canada, Victoria, 2005.

            Tibby, J. P.R. Leavitt, C.D. Sayer, and H. Heijnis.  Assessing human impact on eastern Australian coastal lakes: a palaeo perspective.  INQUA congress, China, 2005.

            McGowan, S., P.R. Leavitt, R.I. Hall, B.B. Wolfe, T.W. Edwards, T. Karst-Riddoch, S.R. Vardy.  Relative importance of river flooding and regional climate variability as controls of algal production in lakes of the Peace-Athabasca Delta.  American Society of Limnology and Oceanography.  Santiago, Spain, 2005.

            Michels, A., K. Laird, D. Thompson, P.R. Leavitt and B.F. Cumming.  Reconstructing drought regimes during the past six millennia.  Canadian Quaternary Association, (CANQUA) Winnipeg, MB, 2005.

            *Leavitt, P.R., S.E. Hampton, D.E. Schindler, P.R. Sanford, and B.F. Cumming. Persistent increases in ecosystem variability following lake eutrophication and recovery: The case of Lake Washington, USA.  American Society of Limnology and Oceanography. Salt Lake City, UT, 2005.

*Patoine, A., M.D. Graham, R. Hesslein, and P.R. Leavitt.  Landscape-scale patterns of nitrogen fixation by cyanobacteria.  American Society of Limnology and Oceanography. Salt Lake City, UT, 2005.

*Dietrich, S.V., S. McGowan, and P.R. Leavitt. Quantitative evaluation of lake relative sensitivity to climate variation and land-use practices.  American Society of Limnology and Oceanography. Salt Lake City, UT, 2005.

Bunting, L., P.R. Leavitt, V. Hall, C.E. Gibson, and D. Gallagher.   Nitrogen degradation of water quality in a phosphorus-saturated catchment: The case of Lough Neagh, Northern Ireland, 1930-2001. American Society of Limnology and Oceanography. Salt Lake City, UT, 2005.

            *Leavitt, P.R., R.D.Vinebrooke, D.E. Schindler, S.E. Hampton, and S. Fradkin.  Mountain lakes as indicators of human and natural stressors: Past patterns, modern concerns and future forecasts.  Gordon Research Conferences, Santa Ynez, CA, 2005.

Bunting, L., P.R. Leavitt, V. Hall, C.E. Gibson, and D. Gallagher.   Nitrogen degradation of water quality in a phosphorus-saturated catchment: The case of Lough Neagh, Northern Ireland, 1930-2001.Gordon Research Conferences, Santa Ynez, CA, 2005.

Brock, C.S., P.R. Leavitt, S.P. Johnson, J.W. Moore, D.E. Schindler and P.D. Quay.  Spatial variability of stable isotopes and fossil pigments in surface sediments of two Alaskan salmon lakes: Constraints on quantitative estimates of past fish populations.  Society of Canadian Limnologists.  Windsor, Canada, 2005.

*Leavitt, P.R. Science, politics, doubt and hope: The future of limnology in Canada. Society of Canadian Limnologists.  Windsor, Canada, 2005.

Patoine, A., and P.R. Leavitt. Spatial and temporal variability of planktonic food-chain length: Influence of lake size, productivity, dietary shifts and weather conditions. Society of Canadian Limnologists.  Windsor, Canada, 2005.

Michels-Estrada, A., B.F. Cumming, P.R. Leavitt and D. Thompson.  Multi-decadalto millennial-scale shifts in drought conditions on the Canadian Prairies over the past six millennia. Society of Canadian Limnologists.  Windsor, Canada, 2005.

*Leavitt, P.R. Change, chance and causation: New approaches to quantify ecosystem variability in the 21^st century.  International Association of Theoretical and Applied Limnology.  Lahti, Finland, 2004.

            Bunting, L., V. Hall, P.R. Leavitt, C.E. Gibson, R.H. Foy, D.R. Engstrom, and D. Gallagher. Nitrogen degradation of water quality in a                          phosphorus-saturated catchment: The case of Lough Neagh, Northern Ireland. International Association of Theoretical and Applied Limnology. Lahti, Finland, 2004.

McGowan, S., A. Patoine, M.D. Graham, and P.R. Leavitt. Intrinsic and extrinsic controls of  lake phytoplankton synchrony. International Association of Theoretical and Applied Limnology.  Lahti, Finland, 2004.

*Patoine, A., M.D. Graham, and P.R. Leavitt. Landscape-scale patterns of nitrogen fixation by cyanobacteria. International Association of Theoretical and Applied Limnology.  Lahti, Finland, 2004.

*Leavitt, P.R., R.D.Vinebrooke, D.E. Schindler, S.E. Hampton, and S. Fradkin.  Mountain lakes as indicators of human and natural stressors: Past patterns, modern concerns and future forecasts.  Ecological Society of America. Portland, OR, 2004.

Leavitt, P.R., S.E. Hampton, D.E. Schindler, S.R. Sanford, and B.F. Cumming. Reduced ecosystem predictability arising from pollution: Fossil and historical records of lake response to sewage, its diversion and continued land use.  Society of Canadian Limnologists.  St. John’s, NFLD, 2004.

Patoine, A., and P.R. Leavitt. Patterns and controls of prairie lake synchrony during the 20^th century: Evidence from fossil pigments.  Society of Canadian Limnologists.  St. John’s, NFLD, 2004.

McGowan, S., P.R. Leavitt, R.I. Hall, N.J. Anderson, E. Jeppesen, and B.V. Odgaard. Controls of algal abundance and community composition during alternative stable state changes.  9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

Leavitt, P.R., S.E. Hampton, D.E. Schindler, and S.R. Sanford.   Resistance, resilience and recovery: Comparison of historica and fossil records of lake response to sewage, its diversion and continued land use.  9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

Hall, R.I., and PAD project co-authors.  The Peace-Athabasca Delta Paleolimnology study: Assessing the roles of climate variability and river regulation on hydro-ecological conditions of a northern delta. 9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

Clogg-Wright, K.P., and PAD project co-authors. Mud and maps: Comparison of sedimentary analyses of hydrological and ecological change with historical maps in the Peace-Athabasca Delta, northern Canada. 9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

Karst-Riddoch, T.L., and PAD project co-authors. 18^th century drought in the Peace-Athabasca Delta (Canada): Evaluating the role of regional climate variability on hydrology and ecology of delta lakes.  9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

McGowan, S., and PAD project co-authors. Assessment of the alternative stable states hypothesis in lakes of the Peace-Athabasca delta, northern Alberta.   9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

Fluin, J., P.R. Leavitt,  C.D. Sayer, H. Heijnis, and J.. Tibby.  A multiproxy assessment of the limnological history of Lake Ainsworth, northern New South Wales, Australia.  9^th International Paleolimnology Symposium. Espoo, Finland, 2003.

Leavitt, P.R., B.F. Cumming, J.P. Smol, M. Reasoner, R. Pienitz, and D.A. Hodgson. Climatic control of UV radiation impacts on lakes.  Ecological Society of America. Savannah, GA, 2003.

*Leavitt, P.R.  Change, chance and causation: the role of paleoecology in defining ecosystem variability.  American Society of Limnology and Oceanography.  Salt Lake City, UT, 2003.

Brock, C.S., N.E. Knezacek, M.D. Graham, and P.R. Leavitt.   Stable isotope evidence of nitrogen saturation in riverine lake ecosystems by 75 years of urban effluent.  American Society of Limnology and Oceanography.  Salt Lake City, UT, 2003.

McGowan, S., R.I. Hall, and P.R.Leavitt.  Regulation of lake stable states by hydrologic variability in central North America: Evidence from whole-lake experiments. American Society of Limnology and Oceanography.  Salt Lake City, UT, 2003.

Karst-Riddoch, T.L., and 12 others.  Linkages between hydrology and limnology over the last 300 years in the Peace-Athabasca Delta, Canada.  American Society of Limnology and Oceanography.  Salt Lake City, UT, 2003.

*Leavitt, P.R. Impacts of urbanization and tertiary sewage treatment on water quality in central North America.  LIMPACS International Workshop.  Silkeborg, Denmark, 2003.

Leavitt, P.R. Stranger in a strange land: the importance of limnology in an arid regions.  Society of Canadian Limnologists.  Ottawa, ON, 2003.

McGowan, S., P.R. Leavitt, E. Jeppesen, B. Odgaard, N.J. Anderson, and R.I. Hall.  Controls of algal production and community composition through the clearwater-turbid transition in two Danish Lakes.  British Ecological Society.  University of York, UK, 2002.

            Wolfe, B.B., A. Paterson, T. Karst, R.I. Hall, S. McGowan, P.R. Leavitt,S.R. Vardy, T.W.D. Edwards, T.W.D., and W.M. Last.  Comparing paleolimnological reconstructions with observed ice-jam flood frequency, Peace-Athabasca Delta, Alberta. International Association for Great Lakes Research. Winnipeg, MB, 2002.

Wolfe B.B., A. Paterson, T. Karst, R.I. Hall, S. McGowan, P.R. Leavitt, S.R. Vardy, T.W.D. Edwards and W.M. Last. 2002. Comparing paleolimnological reconstructions with observed ice-jam flood frequency, Peace-Athabasca Delta, Alberta. International Diatom Symposium. Ottawa, ON, 2002.

*Leavitt, P.R., G. Chen, J.A. Rusak, O.G. Olson, S. Wunsam, B.F. Cumming, and K. Laird. The past, present and future of prairie droughts and their impacts.   American Society of Limnology and Oceanography.  Victoria, BC, 2002.

McGowan, S., P.R. Leavitt, R.I. Hall, B.B. Wolfe, T.W. Edwards, T. Karst, A. Paterson, S.R. Vardy, M.C. English, B. Boots.  Temporal and spatial assessment of the alternative stable states hypothesis in sub-Arctic delta lake systems (Peace-Athabasca Delta, northern Alberta).  American Society of Limnology and Oceanography.  Victoria, BC, 2002.

*Schindler, D.E, M.D. Schuerell, J.W. Moore, R. Hilborn, T.P. Quinn, P.R. Leavitt, and V.L. St. Louis.  Climate, marine-derived nutrients, and fisheries as drivers of Pacific salmon population dynamics.  American Society of Limnology and Oceanography.  Victoria, BC, 2002.

Donahue, W.F., M.A. Turner, D.L. Findlay, P.R. Leavitt, M.P. Stainton, and S.J. Page. The role of ultraviolet radiation in structuring the shallow benthic communities of boreal forest lakes. American Society of Limnology and Oceanography.   Victoria, BC, 2002.

Wolfe, B.B., T.W.D. Edwards, R.I. Hall, M. Falcone, T. Karst, B. Boots, M.C. English, W.M. Last, P.R. Leavitt, S. McGowan and S. R. Vardy. Quantitative Assessment of Present and Past Hydrological Status of "Spruce Island Lake", Peace-Athabasca Delta, Canada, Using Water Isotope Tracers. American Geophysical Union.   San Fransisco, CA, 2002.

*Leavitt, P.R., G. Chen, J.A. Rusak, O.G. Olson, S. Wunsam, B.F. Cumming, and K. Laird. The past, present and future of prairie droughts.  Society of Canadian Limnologists. Vancouver, BC, 2002.

*Schindler, D.E., P.R. Leavitt, W. Lew, R. Hilborn, T.P. Quinn, and D.E. Rogers. Do climate change and fisheries cause depensation in Sockeye Salmon? Society of Canadian Limnologists. Vancouver, BC, 2002.

Rusak, J.A., P.R. Leavitt, M.D. Graham, S. McGowan, S. Wunsam, and B.F. Cumming.  Multi-scale control of prairie lake nutrient cycling and production. Society of Canadian Limnologists. Vancouver, BC, 2002.

Wolfe, B., A. Paterson, T. Karst, R.I. Hall, S. McGowan, P.R. Leavitt, S. Vardy, T. Edwards, and W.M. Last.  Comparing paleolimnological reconstructions with observed ice-jam flood frequency, Peace-Athabasca Delta, Alberta. Society of Canadian Limnologists. Vancouver, BC, 2002.

Karst, T., A. Paterson, R.I. Hall, S. McGowan, P.R. Leavitt, S. Vardy, and B. Wolfe.  Biological indicators for assessing hydrological changes in the Peace-Athabasca Delta, Alberta.  Society of Canadian Limnologists. Vancouver, BC, 2002.

Wolfe, B., R.I. Hall, T. Edwards, B. Warner, T. Karst, A. Paterson, S. Vardy, M. English, B. Boots, W.M. Last, P.R.Leavitt, and S. McGowan.  Determining flood and climate history of the Peace-Athabasca delta using a multidisciplinary paleolimnological approach.  Society of Canadian Limnologists. Vancouver, BC, 2002.

Wolfe, B., T.W.D. Edwards, R.I. Hall, T. Karst, A. Paterson, M.C. English, B. Boots, W.M. Last, P.R. Leavitt, S. McGowan, B.G. Warner, and S.R. Vardy.   Determining flood and climate history of the Peace-Athabasca Delta using a multidiscipiny paleolimnological approach.  Canadian Quaternary Association.  Whitehorse, Canada, 2001.

Pienitz, R., J.P. Smol, W.M. Last, P.R. Leavitt, and B.F. Cumming.   Multi-proxy Holocene paleoclimatic record from a saline lake in the Yukon, Canadian subArctic.  Canadian Quaternary Association.  Whitehorse, Canada, 2001.

Wakeham, S., J. Forrest, Y. Gelinas, C. Alexander, C. Masiello and P.R. Leavitt. Aliphatic and aromatic hydrocarbons in Lake Washington sediments – a 25-year retrospective.  20^th International meeting on Organic Geochemistry.  Nancy, France, 2001.

            *Leavitt, P.R.  Time will tell: Paleoecology and the hidden impacts of variability on ecosystem experiments.   Ecological Society of America.  Madison, WI, 2001. 

            Schindler, D.E., W. Lee, and P.R. Leavitt.  Depensatory mechanisms in the ecology of sockeye salmon and their ecosystems.  Ecological Society of America.  Madison, WI, 2001.

            Rusak, J.A., C.S. Brock, P.R. Leavitt, and N.D. Yan.  Population synchrony in a hydrologically connected landscape: Quantifying patterns and identifying processes. Ecological Society of America.  Madison, WI, 2001.

            McGowan, S., P.R. Leavitt, R.I. Hall, E. Jeppesen and N.J. Anderson.   The relative importance of nutrients and food-web interactions as controls of ecosystem state change in shallow Danish lakes.  Workshop on Ecology of Wetlands and Shallow Lakes.  Delta Marsh, MB,2001.

            *Leavitt, P.R.  The past, present and future of Prairie droughts: How bad is bad?  National Crop Insurance General Managers’ Conference.  Regina, SK, 2001.

            Leavitt, P.R., M.D. Graham, and D. Wang.  Landscape impacts of sewage pollution revealed by stable isotope analysis of lake sediments.  American Society of Limnology and Oceanography.  Albuquerque, NM, 2001.

            Rusak, J.A., P.R. Leavitt, M.D. Graham, S. Wunsam, G. Chen, and B. Cumming.  Climatic and agricultural influences on the relationship between richness and lake productivity on the Great Plains: A paleolimnological perspective.  American Society of Limnology and Oceanography.  Albuquerque, NM, 2001.

            Xenopoulos, M.A., P.R. Leavitt, and D.W. Schindler.  The effect of water column mixing and ambient UVR on phytoplankton pigment concentrations in boreal lakes.  American Society of Limnology and Oceanography.  Albuquerque, NM, 2001.

            Leavitt, P.R., M.D. Graham, and D. Wang.  Landscape impacts of sewage pollution revealed by stable isotope analysis of lake sediments. Society of Canadian Limnologists.  Toronto, ON, 2001.

            *Rusak, J.A., C.S. Brock, and P.R. Leavitt.  Landscape-level patterns of zooplankton abundance in lakes of the Qu'Appelle Valley, Saskatchewan. Society of Canadian Limnologists.  Toronto, ON, 2001.

            Leavitt, P.R., J.A. Rusak, O.G. Olson, S. Wunsam, G. Chen, M. Chen, J. You, L. Zhang, and B. Cumming.  Crops, craps and canonical analyses: Ecological risk assessment using mud and math.  8th International Symposium on Paleolimnology. Kingston, ON, 2000.

            Hodgson, D.A., P.O. Montiel, W. Vyerman, P.R. Leavitt, and P.E. Noon.   Past UV-R environments in Antarctic lakes.   8th International Symposium on Paleolimnology. Kingston, ON, 2000.

            Leavitt, P.R., J.A. Rusak, O.G. Olson, S. Wunsam, G. Chen, M. Chen, J. You, L. Zhang, and B. Cumming.  Droughts, lakes and crop insurance: Ecological risk assessment using mud and math.  Ecological Society of America.  Snowbird, UT, 2000.

            Rusak, J.A., P.R. Leavitt, G. Chen, M. Chen, J. You, and L. Zhang.   Predicting the future and unravelling the past: Paleolimnological analyses of fluctuations in the climate and water quality of central Saskatchewan.  American Society of Limnology and Oceanography.  Copenhagen, Denmark, 2000.

            Hambright, K.D., W. Eckert, P.R. Leavitt, T. Zohary, and S.S. Schwartz.   Hydrological controls of P accumulation in Lake Kinneret: Role of dams and diversions in regulating lake productivity.  American Society of Limnology and Oceanography.  Copenhagen, Denmark, 2000.

.           Leavitt, P.R., M.D. Graham, and R. Hesslein.  Landscape patterns of N₂-fixation in lakes of the North American Great Plains.  Applications of Stable Isotope Techniques to Ecological Studies.  Braunschweig, Germany, 2000.

            Leavitt, P.R., R. Knapp, and D.E. Schindler. Perturbations to nutrient cycles and primary production from trout stocking in fishless alpine lakes of western North America. North Pacific Chapter of American Fisheries Society.  Mount Vernon, WA, 2000.

            Leavitt, P.R., M.D. Graham, B.F. Cumming, J.P. Smol, M. Reasoner, R. Pienitz, and D. Hodgson.  Regulation of lake production by UV radiation and dissolved organic matter: Evidence from Holocene lake sediments. Society of Canadian Limnologists.  Fredericton, NB, 2000.

            *Leavitt, P.R.  Drought prediction using conditional probability analysis of paleoclimate records.  Annual Crop Insurance Research Managers Conference. Guelph, ON, 1999.

            Leavitt, P.R., M.D. Graham, B.F. Cumming, J.P. Smol, M. Reasoner, R. Pienitz, and D. Hodgson.  The evolution of boreal lake sensitivity to UV radiation and DOM.  American Society of Limnology and Oceanography. Santa Fe, NM, 1999.

            Graham, M.D., R.D. Vinebrooke, and P.R. Leavitt.  Influence of herbivory and UV radiation on interactions between phytoplankton and periphyton in a prairie wetland. American Society of Limnology and Oceanography. Santa Fe, NM, 1999.

            Olson, O.G., P.R. Leavitt, G. Chen, M. Chen, J. You, and K. Laird.   Drought prediction using conditional probability analysis of paleoclimate records. Society of Limnology and Oceanography. Santa Fe, NM, 1999.

            *Leavitt, P.R., O.G. Olson, G. Chen, M. Chen, J. You, L. Zhang, and K.R. Laird. Forward into the past: Drought prediction using paleoclimate records. Society of Canadian Limnologists.  Edmonton, AB, 1999.

            Leavitt, P.R., K. Kidd, M.D. Graham, and R.H. Hesslein.  Spatial and temporal variation in MeHg transfer in lakes: Effects of diel vertical migration by invertebrate predators.  Society of Canadian Limnologists.  Edmonton, AB, 1999.

            Hovdebo, J., and P.R. Leavitt.  Indirect effects of ultraviolet light in a high dissolved organic carbon lake. Society of Canadian Limnologists.  Edmonton, AB, 1999.

            Smol, J.P., P.R. Leavitt, R.I. Hall, A. Dixit, and R. Quinlan. Paleolimnological assessment of water quality changes in the Northern Great Plains: The effects of agriculture, urbanization, and climate on prairie lakes and reservoir ecosystems.   North American Lake Management Society.   Banff, AB, 1998.

            Leavitt, P.R. Pigments as biogeochemical fossils in lake sediments: Taphonomic studies and novel environmental applications.  Geological Society of America.  Toronto, ON, 1998.

            Chen, G., O.G. Olson, P.R. Leavitt, and K.R. Laird.  Drought frequency in North America: Predicting the future using conditional probability analysis of paleoclimate records.  Geological Society of America.  Toronto, ON, 1998.

            *Leavitt, P.R., R.I. Hall, J.P. Smol, A. Dixit, and R. Quinlan. Effects of agriculture, urbanization and climate on water quality in northern Great Plains lakes: Evidence from paleoecology. Prairie Division of Canadian Association of Geographers.   Watrous, SK, 1998.

            Leavitt, P.R., M.D. Graham, B.F. Cumming, J.P. Smol, M. Reasoner, R. Pienitz, and D. Hodgson.  The evolution of boreal lake sensitivity to UV radiation.  27th Congress of Societas Internationalis Limnologiae (SIL).  Dublin, Ireland, 1998.

            *Smol, J.P., P.R. Leavitt, R.I. Hall, A. Dixit, and R. Quinlan. A landscape, paleolimnological assessment of the effects of agriculture, urbanization and climate on water quality changes in the northern Great Plains.  27th Congress of Societas Internationalis Limnologiae (SIL).   Dublin, Ireland, 1998.

            Hall, R.I., P.R. Leavitt, A. Dixit, R. Quinlan, and J.P. Smol. New techniques in paleoecology: Quantification of causal relationships using variance partitioning.  27th Congress of Societas Internationalis Limnologiae (SIL).  Dublin, Ireland, 1998.

            Cottingham, K.L., and P.R. Leavitt. Increased ecosystem variability and reduced predictability following nutrient enrichment: Implications for large scale manipulations. Ecological Society of America. Baltimore, MD, 1998.

            Leavitt, P.R., K.A. Kidd, M.D. Graham, and R.H. Hesslein.  Spatial and temporal variation in MeHg transfer in lakes: Effects of diel vertical migration by invertebrate predators.  International Meeting on Applications of Stable Isotope Techniques to Ecological Studies.  Saskatoon, SK, 1998.

            Graham, M.D., P.R. Leavitt, and R.H. Hesslein.  Complementary use of stable isotope and gut pigment analyses to determine zooplankton trophic positions in prairie lakes.  International Meeting on Applications of Stable Isotope Techniques to Ecological Studies.  Saskatoon, SK, 1998.

            *Leavitt, P.R. The revitalization of environmental monitoring: Unexpected uses of long-term data in aquatic sciences.  Plenary speaker. Society of Canadian Limnologists. Kingston, ON, 1998.

            Hall, R.I., P.R. Leavitt, R. Quinlan, A.S. Dixit, and J.P. Smol. Limnological succession in reservoirs: Paleolimnological evidence from two prairie habitats.   Society of Canadian Limnologists. Kingston, ON, 1998.

            Vinebrooke, R.D., and P.R. Leavitt. Donor-control of a littoral food web by allochthonous dissolved organic matter in an alpine lake.  Society of Canadian Limnologists. Kingston, ON, 1998.

            Pienitz, R., J.P. Smol. W.M. Last, P.R. Leavitt, S.E. Wilson, and B.F. Cumming.  Holocene palaeolimnology of Lake U60, an athalassic saline lake from the Canadian Subarctic: A multiproxy approach.  Society of Canadian Limnologists. Kingston, ON, 1998.            

            Pienitz, R., J.P. Smol. W.M. Last, P.R. Leavitt, S.E. Wilson, and B.F. Cumming.  Holocene palaeolimnology of Lake U60, an athalassic saline lake from the Canadian Subarctic: A multiproxy approach.  Seventh International Paleolimnological Congress. Germany, 1997.

            Leavitt, P.R., T.P. Cobb, M.D. Graham, and C.J. Teichreb.  Regulation of invertebrate migration and aquatic food-web structure by UV radiation and zooplanktivorous fish.  Ecological Society of America.  Albuquerque, NM, 1997.

            *Leavitt, P.R., and R.D. Vinebrooke.  Habitat-specific responses of algae to UV radiation and herbivores in an alpine lake. American Society of Limnology and Oceanography. Santa Fe, NM, 1997.

            Hall, R.I., P.R. Leavitt, J.P. Smol, A. Dixit and R. Quinlan.  New techniques to quantify landscape effects of multiple stressors on prairie lakes.  American Society of Limnology and Oceanography. Santa Fe, NM, 1997.

            Vinebrooke, R.D., and P.R. Leavitt. The ecological significance of allochthonous DOM in an ultraoligotrophic clearwater lake.  American Society of Limnology and Oceanography. Santa Fe, NM, 1997.

            Verschuren, D., C. Cocquyt, P.R. Leavitt, and N. Roberts.  Geochemical and biological history of a fluctuating tropical soda lake: Lake Sonachi, Kenya. American Society of Limnology and Oceanography. Santa Fe, NM, 1997.

            Leavitt, P.R., D.W. Schindler, D.L. Findlay, and J.P. Smol.  Algal responses to DOC loss during whole-lake acidification: Evidence from paleolimnology.  Society of Canadian Limnologists. Ottawa, ON, 1997.

            Vinebrooke, R.D., and P.R. Leavitt. Allochthonous DOM in an ultraoligotrophic clearwater lake: Nutrient regulator or UV-radiation protectant? Society of Canadian Limnologists. Ottawa, ON, 1997.

            Hall, R.I., P.R. Leavitt, J.P. Smol, A. Dixit, and R. Quinlan.  Use of long-term data to quantify cause and effect on paleolimnology: A case study from the Prairies.  Society of Canadian Limnologists. Ottawa, ON, 1997.

            Graham, M.D., P.R. Leavitt, and R.H. Hesslein. Do omnivory and selective herbivory in zooplankton vary along a lake productivity gradient?  Society of Canadian Limnologists. Ottawa, ON, 1997.

            Hall, R.I., P.R. Leavitt, J.P. Smol, A. Dixit, and R. Quinlan.  Novel uses of century-long environmental monitoring data in water quality evaluation.  Ecological Monitoring and Assessment Network National Science Meeting.  Saskatoon, SK, 1997.

            Hall, R.I., P.R. Leavitt, J.P. Smol, A. Dixit, and R. Quinlan.  Effects of agriculture and sewage treatment on lakes of the northern Great Plains: A paleoecological perspective. Canadian Society for Landscape Ecology and Management.  Regina, SK, 1996.

            *Leavitt, P.R., R.I. Hall, J.P. Smol, A. Dixit, and R. Quinlan.  Effects of agriculture and sewage treatment on lakes of the northern Great Plains: A paleoecological perspective.  Ecological Society of America.  Providence, RI, 1996.

            Leavitt, P.R., D.W. Schindler, D.L. Findlay, and J.P. Smol.  Algal responses to DOC loss during whole-lake acidification: Evidence from paleolimnology.  American Society of Limnology and Oceanography.  Milwaukee, WI, 1996.

            Teichreb, C.J., M.D. Graham, and P.R. Leavitt.  Role of dissolved organic carbon in regulating nutrient availability in prairie lakes and reservoirs. American Society of Limnology and Oceanography.   Milwaukee, WI, 1996.

            Cobb, T.P., M.D. Graham, and P.R. Leavitt. Sex and size-dependent diel migration of Leptodora in an unstratified lake.  American Society of Limnology and Oceanography.  Milwaukee, WI, 1996.

            Graham, M.D., P.R. Leavitt, T.P. Cobb, and R.H. Hesslein.  Omnivory and selective feeding by zooplankton in an eutrophic lake.   American Society of Limnology and Oceanography.  Milwaukee, WI, 1996.

            Hall, R.I., J.P. Smol, and P.R. Leavitt.  Comparison of fossil algal pigments and diatoms as measures of lake eutrophication.  American Society of Limnology and Oceanography.  Milwaukee, WI, 1996.

            Vinebrooke, R.D., and P.R. Leavitt.  Epilithic and epipelic periphyton responses to ultraviolet radiation and zoobenthos in an alpine lake.  North American Benthological Society.  Flathead Lake, MO, 1996.

            Leavitt, P.R., R.D. Vinebrooke, M.A. Reasoner, M. Hickman, R. Pienitz, and J.P. Smol. Regulation of primary production in alpine lakes by climatic change, forest development, and UV radiation.  Society of Canadian Limnologists. Montreal, PQ, 1996.

            Graham, M.D., P.R. Leavitt, and R.H. Hesslein.  Omnivory and zooplankton trophic position: Testing the existence of a trophic continuum.  Society of Canadian Limnologists. Montreal, PQ, 1996.

            Smol, J.P., A. Dixit, R. Quinlan, P.R. Leavitt, and K. Muir. Long-term water quality changes in the Qu'Appelle Valley (SK) lakes and reservoirs: The paleolimnology of Pasqua Lake.  Society of Canadian Limnologists. Montreal, PQ, 1996.

            Vinebrooke, R.D., and P.R. Leavitt.  Responses of phytoplankton and periphyton to ultraviolet radiation and invertebrates in an alpine lake.  Society of Canadian Limnologists. Montreal, PQ, 1996.

            *Vinebrooke, R.D., and P.R. Leavitt.  Impact of solar ultraviolet radiation on aquatic ecosystems.  International Association of Great Lakes Research. Toronto, ON, 1996.

            Leavitt, P.R., and R.D. Vinebrooke.  Effects of human activity and recent climatic variability on lakes of the Palliser triangle. 1996 Canadian Association of Geographers.  Saskatoon, SK, 1996.

            *Hall, R.I., P.R. Leavitt, J.P. Smol, A. Dixit, and R. Quinlan.  Effects of agriculture and sewage treatment on prairie lakes: a paleoecological perspective. Canadian Association of Geographers.  Saskatoon, SK, 1996.

            Quinlan, R., J.P. Smol, and P.R. Leavitt. Chironomid (Diptera: Chironomidae) as indicators of past hypolimnetic oxygen changes in Qu'Appelle Valley Lakes. Canadian Association of Geographers.  Saskatoon, SK, 1996.

            Wilson, S., B.F. Cumming, R. Pienitz, J.P. Smol, P.R. Leavitt, and M. Heinrichs.  Tracking climatic and other environmental changes in closed-basin lakes from western Canada: The PISCES II project.  Symposium on Climatic Variations and Biodiversity Change during the Last Millenium.  Geological Survey of Canada.  Ottawa, ON, 1996.

            Hall, R.I., P.R. Leavitt, J.P. Smol, A. Dixit, and R. Quinlan.  Effects of agriculture and sewage treatment on the Qu'Appelle Valley lakes: A paleoecological perspective.  Workshop on Lakeshore Management in Saskatchewan. Canadian Water Resources Association.   Saskatoon, SK, 1996.

            Leavitt, P.R., D. Sherbot, A. Dixit, R. Quinlin, and J.P. Smol.  Water quality changes in prairie lakes and reservoirs: paleolimnological tools to assist lake managers.  North American Lake Management Society.  Toronto, ON, 1995.

           Leavitt, P.R., D. Sherbot, A. Dixit, R. Quinlan, and J.P. Smol.  Water quality changes in prairie lakes and reservoirs: paleolimnological tools to assist lake managers. Canadian Society of Environmental Biologists. Regina, SK, 1995.

            Stager, J.C., R.I. Hall, and P.R. Leavitt.  Paleolimnology and the study of eutrophication in Upper Saranac Lake, New York.  North American Lake Management Society.  Toronto, ON, 1995.

            Leavitt, P.R., R.D. Vinebrooke, B.F. Cumming, and J.P. Smol. Evaluation of pigments as paleoclimatic indicators in saline lakes.  Ecological Society of America. Snowbird, UT, 1995.

            Leavitt, P.R., R.D. Vinebrooke, M.A. Reasoner, M. Hickman, R. Pienitz, and J.P. Smol.  Regulation of primary production in alpine lakes by climatic change and forest development.  American Society of Limnology and Oceanography. Reno, NV, 1995.

            Graham, M.D., and P.R. Leavitt.  Variation in trophic position of aquatic invertebrates across a lake productivity gradient: testing the trophic continuum hypothesis. American Society of Limnology and Oceanography.  Reno, NV, 1995.

            Cumming, B., S.E. Wilson, J.P. Smol, P.R. Leavitt, I. Walker, and M. Heinrichs.  Paleolimnological reconstructions of climatic and other environmental changes in closed-basin lakes from western Canada: The PISCES II Project.  Canadian Quaternary Association (CANQUA). St. John's, NFLD, 1995.

            Vinebrooke, R.D., and P.R. Leavitt.  Effects of UV radiation and macrograzers on periphyton in an alpine lake. ASLO. Reno, NV, 1995.

            Verschuren, D., C. Cocquyt, and P.R. Leavitt.  Patterns and mechanisms of biotic change in a fluctuating tropical soda lake: Lake Sonachi (Kenya), ca. 1815 to present.  American Society of Limnology and Oceanography.  Reno, NV, 1995.

            Vinebrooke, R.D., and P.R. Leavitt.  Can high ambient UV radiation levels directly affect phototrophs in alpine lakes?  Society of Canadian Limnologists.  Ottawa, ON, 1995.

            Cumming, B.F., S.E. Wilson, R. Pienitz, J.P. Smol, B.A. Zeeb, P.R. Leavitt, and M. Heinrichs.  Tracking climatic and other environmental changes in closed-basin lakes from Western Canada: the PISCES-II project.  American Society of Limnology and Oceanography (ASLO) / North American Benthological Society (NABS) joint symposium on climatic change. Leesburg, VA, 1994.

            Cumming, B.F., S.E. Wilson, R. Pienitz, J.P. Smol, B.A. Zeeb, P.R. Leavitt, and M. Heinrichs.  Paleolimnological investigations of salinity, climatic, and environmental shifts - II (PISCES II): tracking environmental changes in closed-basin lakes from Western and Northern Canada.   American Quaternary Association (AMQUA). Minneapolis, MN, 1994.

            Leavitt, P.R., D.E. Schindler, and D.W. Schindler. Effects of trout introduction on primary production in a fishless alpine lake.  American Society of Limnology and Oceanography.  Miami, FL, 1994.

            *Dibble, K.M., and P.R. Leavitt. Regulation of pigment deposition by photo-oxidation and zooplankton grazing: an individual-based model.  American Society of Limnology and Oceanography.  Miami, FL, 1994.

            *Leavitt, P.R., B.F. Cumming, and J.P. Smol. Evaluation of pigments as paleoclimatic indicators in saline lakes. Society of Canadian Limnologists. Saskatoon, SK, 1994.

            Leavitt, P.R., B.J. Hann, B.L. Zeeb, D.L. Findlay, and D.W. Schindler. Calibration of fossil pigments, diatoms, and Cladocera with 20 years of plankton data from eutrophic Lake 227, Experimental Lakes Area, Ontario, Canada.  Sixth International Palaeolimnology Symposium. Canberra, Australia, 1993.

            Smol, J.P., B.F. Cumming, S.E. Wilson, I.R. Walker, and P.R. Leavitt.   Paleolimnological investigations of salinity, climatic and environmental shifts (the PISCES project): Reconstructing environmental trends from western Canada.  Sixth International Palaeolimnology Symposium, Canberra, 1993.

            *Leavitt, P.R., A.J. Paul, A.K. Hardie, K. Kidd, and D.W. Schindler.   Selective herbivory by zooplankton in two alpine lakes: Results from HPLC analysis of body pigments. ASLO. Edmonton, AB, 1993.

            Paul, A.J., P.R. Leavitt, D.W. Schindler, and A.K. Hardie. Trophic interactions in fishless alpine lakes: Direct and indirect effects of predation by copepods. American Society of Limnology and Oceanography.  Edmonton, AB, 1993.

            Leavitt, P.R. Comparison of 20 years of whole-lake eutrophication and annual fossil pigment records as indicators of ecosystem variability. American Society of Limnology and Oceanography.  Santa Fe, NM, 1992.

            *Leavitt, P.R. and S.R. Sanford. Multiple effects of piscivory on food-web structure: Evidence from paleolimnology. American Society of Limnology and Oceanography.  Halifax, NS, 1991.

            *Leavitt, P.R. Use of fossil pigments for interpretation of whole-lake experiments. IV International Phycological Congress Workshop, Durham, NC, 1991.

            Leavitt, P.R. Herbivore and nutrient regulation of algal blooms in eutrophic Lake Mendota. American Society of Limnology and Oceanography.  Williamsburg, VA, 1990.

            Smol, J.P., I.R. Walker and P.R. Leavitt. Paleolimnology and hindcasting climatic trends. Soc. Internat. Limnol., Munich, 1989.

            Leavitt, P.R., P. Sanford and J.F. Kitchell. Road-building, hypolimnetic aeration, liming and food-web manipulation: The annual record of fossil pigments. Vth International Symposium on Paleolimnology, Ambleside, England, 1989.

            Leavitt, P.R. and S.R. Carpenter. Sedimentary pigment concentrations record changes in fish community composition. American Society of Limnology and Oceanography.  Boulder, CO, 1988.

            Leavitt, P.R. and S.R. Carpenter. Whole-lake experiments: The sedimentary record of algal pigments. Ecological Society of America. Davis, CA, 1988.

            Leavitt, P.R. and S.R. Carpenter. Pigment budgets: Comparisons of select carotenoids.  American Society of Limnology and Oceanography. Madison, WI, 1987.

            Leavitt, P.R. and S.R. Brown. Effects of Daphnia grazing on the carotenoids of Oscillatoria utermöhlii. American Society of Limnology and Oceanography. Vancouver, B.C., 1984.

 

Other Invited Presentations:

            2008     Raincoast Conservation Foundation/Fisheries and Oceans Canada

            2007     National Center for Ecological Analysis and Synthesis (NCEAS)

            2006     NOAA (Seattle), McGill University, University of Lethbridge, Last Mountain Lake Watershed Advisory Committee.

            2005     SK Watershed Authority

            2004     University of Victoria, Alberta Environment Prairie Drought Workshop, US Long Term Ecological Research (LTER) Network Variability-Disturbance Workshop, University of Regina.

            2003     Danish National Environmental Research Institute (LIMPACS, 2), Norlakes Symposium, (1), University of Minnesota (4), University of Alberta (2). Semi-Arid Network Workshop (PARC).

            2002     Cornell University (2), University of Saskatchewan (2), University of Stockholm, Lund University.

            2001     SaskPower Corporation, University of Arizona, Institute for Ecosystems Studies, Great Lakes Environmental Research Lab., University of Montreal, US-Geological Survey.

            2000     University of Washington (5), University of Umeä, Sweden (4), University of Stockholm.

            1999     BIOCAP Canada, Duke University, National Aeronautics and Space Administration, North Dakota State University, University of Montreal (in french), US Environmental Protection Agency, Government of Saskatchewan.

            1998     University of Montana.

            1997     British Antarctic Survey, Danish National Environmental Research Institute, University of Saskatchewan, University of Copenhagen-Hilleröd.

            1996     Loyola University of Chicago, Universite Laval (in french), University of Minnesota (2), University of Wisconsin-Madison.

 

Grants Awarded:  

            2009     Canada Foundation for Innovation, Leading Edge Fund, with 9 others (PI, $2,799,999)

            2008     NSERC Special Research Opportunity, with P. Francus and 7 others (co-PI, $794,356) 

            2007     NSERC Discovery Grant (PI, $313,750)

            2005     Betty and Gordon Moore Foundation, with D.E. Schindler, B. Finney and R. Gregory-Eaves (co-PI, $2,396,805 USD). 

            2004     Canada Foundation for Innovation Grant/ Saskatchewan Economic and Cooperative Development Strategic Initiative, with R. Bailey, M. Birgham, G. Huang, H. Qing, Z. Chen, Regina (co-PI, $1,876,503)

            2003     Canada Research Chair (Tier I)/Western Economic Development/Canada Foundation for Innovation (PI, $2,262,300)

            2002     NSF Research Grant, with D.E. Schindler and 3 others ($527,703 USD)

            2002     NSERC Research Grant (PI, $246,000)

            2000     BC Hydro Research Contract, with R.I. Hall and 4 others ($1,914,791)

            2000     BIOCAP Canada Research Grant (PI, $49,000)

            1999     Canada Foundation for Innovation Grant/ Saskatchewan Economic and Cooperative Development Strategic Initiative, with M. Brigham, G. Huang, H. Weger, S. Wilson, Regina (PI $768,970)

            1998     NSERC Research Grant (PI $140,077)

            1998     NSERC Equipment Grant (PI $33,943)

            1997     NSERC Strategic Grant, with G. Chen, Regina (PI $278,104)

            1997     Agri-food Innovation Fund (PI $31,000)

            1996     Canadian Association of Universities and Colleges (PI $4000)

            1995     NSERC Equipment Grant (PI $36,428)

            1995     University of Regina, Natural and Applied Sciences Grant (PI $1,500)

            1995     University of Regina, General Research Grant (PI $2,100)

            1994     NSERC Research Grant (PI $108,000)

            1994     NSERC Equipment Grant (PI $28,903)

            1994     NSERC Strategic Grant, with J. Smol, Queen's Univ. (co-PI, $310,000)

            1994     NSERC-DFO Collaborative Research and Development Grant (PI $20,000)

            1994     Department of Energy, Mines and Resources Research Grant (PI $11,000)

            1994    University of Regina, President's NSERC General Research Grant (PI $2,826)

            1994    University of Regina, Dean's Equipment Fund (PI $17,500)

            1993    University of Regina, Dean's Equipment Fund (PI $25,000)

            1993    University of Regina, President's NSERC General Research Grant (PI $5,000)

            1992     Canadian Circumpolar Institute (PI $2,600)

            1986     U.S. National Science Foundation. BSR-85-21832. Doctoral Dissertation Improvement Grant (PI $10,000 US).

            1986     Indiana Academy of Science. Grant-in-Aid-of-Research (PI $500 US)

            1986     Sigma Xi. Grant-in-Aid-of-Research (PI $900 US)

 

Awards:

            2007     Frank H. Rigler Award, Society of Canadian Limnologists. (Highest society honour in recognition of importance and influence of contributions to Canadian limnology)

            2004     University of Regina Alumni Association Award for Excellence in Research

            2003     Canada Research Chair in Environmental Change and Society (Tier I)

            1995     Kalium Professor of Natural Science and Engineering

            1991-2  NSERC Postdoctoral Fellowship

            1989     Visiting Fellowship in Canadian Government Laboratory

            1985-9  Notre Dame Tuition Scholarship

            1983     Senator F. Carrel Scholarship

            1983     Ontario Graduate Scholarship

            1982     Ontario Graduate Scholarship

            1981     Senator F. Carrel Scholarship

 

Professional Societies:

            American Society of Limnology and Oceanography; Canadian Society of Ecology and Evolution; Canadian Society of Environmental Biologists; Ecological Society of America; Geological Society of America; International Association for Great Lakes Research; Sigma Xi; Society of Canadian Limnologists.

 

Professional Activities:

            -Past-President (2006), President (2003-2005), and Vice-President (1999-2002), Society of Canadian Limnologists

            -Conference Co-Chair, American Society of Limnology and Oceanography (2006)

            -Conference Chair: Society of Canadian Limnologists (2001, 2002)

            -National Organizing Committee, 2007 Congress of International Association of Theoretical and Applied Limnology (SIL)

            -National Organizing Committee and Working Group Chair, 2008 Chapman Conference on Lakes and Reservoirs as Sentinels, Integrators, and Regulators of Climate Change, (ASLO, AGU).

            -Editorial Board, Ecology and Ecological Monographs (2002-present)

      -Editorial Board, University of California Press, Freshwater Ecology Series (2007-present)

            -US National Science Foundation Grant Selection Panel, Dynamics of Coupled Natural and Human Systems (2009)

            -Redfield Award Committee, American Society of Limnology and Oceanography (2007-2010)

         -Nominating Committee, American Society of Limnology and Oceanography (2008-2011)

        -Endowment Committee: American Society of Limnology and Oceanography (1997-1999)

            -Canada Research Chair, College of Reviewers (2002-present)

            -Outstanding Reviewer Citation, Limnology and Oceanography (2003)

            -Reviewer: Advances in Limnology, Ambio, Applied and Environmental Microbiology, Aquatic Sciences, Arctic, Antarctic and Alpine Research, Biogeochemistry, Canadian Journal of Fisheries and Aquatic Sciences, Catena, Ecology, Ecological Applications, Ecosystems, Estuaries, Freshwater Biology, Geological Survey of Canada Bulletin, Hydrobiologia, Journal of Environmental Monitoring and Assessment, Journal of Global Planetary Change, Journal of Great Lakes Research, Journal of Limnology, Journal of the North American Benthological Society, Journal of Paleolimnology, Limnology and Oceanography, Mem, Ist. Ital. Idrobiol., Organic Geochemistry, Palaeogeography Palaeoclimatology Palaeoecology, Proceedings of the National Academy of Science, Transactions of the American Fisheries Society, Water Air and Soil Pollution,Wetlands, Alberta Challenge Grants in Biodiversity, American Chemical Society, Canada Research Chairs, Exxon Valdez Trustee Council, Geological Survey of Canada, National Geographic Society, Israel Science Foundation, Maryland Seagrant Program, Natural Environmental Research Council (UK), Natural Science and Engineering Research Council of Canada, Netherlands Organization for Scientific Research, US Geological Survey.

           -Senior scientific reviewer for Clifton Associates, Regina (1999)          

            -Session Chair: Annual Meetings of American Society of Limnology and Oceanography; Ecological Society of America; Society of Canadian Limnologists.

            -Student Presentation Award Judge: Annual Meeting of Ecological Society of America.