Dr. Lance F.W. Lesack - Simon Fraser University Dr. Lance F.W. Lesack - Simon Fraser University
Lesack, L., P. Marsh, F. Hicks, and D. Forbes. 2014. Local spring warming drives earlier river-ice breakup in a large Arctic delta. Geophys. Res. Lett. 41:1560-1566. Geophys. Res. Lett. 41:1560-1566.
See - Canadian media coverage - CBC International 3 Apr 2014.
Lesack, L., P. Marsh, F. Hicks, and D. Forbes. 2013. Timing, duration, and magnitude of peak annual water levels during ice breakup in the Mackenzie Delta and the role of river discharge. Water Resour. Res. 49:8234-8249.
Wrona, F., et al. 2013. Chapter 13, Freshwater ecosystems. Arctic Biodiversity Assessment: Status and trends in Arctic biodiversity. Conservation of Arctic Flora and Fauna, Arctic Council, Akureyri.
Emmerton, C., J. Graydon, J. Gareis, V. St. Louis, L. Lesack, J. Banack, F. Hicks, and J. Nafziger. 2013. Mercury export to the Arctic Ocean from the Mackenzie River, Canada. Environ. Sci. Technol. 47:7644-7654.
Chateauvert, C., L. Lesack, and M. Bothwell. 2012. Bacterial community dominance of particle-attached bacteria in lakes of the Mackenzie River Delta: transparent exopolymer particle contributions. Aquatic Microbial Ecology 68:57-76, doi:10.3354/ame01605.
Chateauvert, C., L. Lesack, and M. Bothwell. 2012. Abundance and patterns of transparent exopolymer particles (TEP) in arctic floodplain lakes of the Mackenzie River Delta. J Geophys Res - Biogeosciences 117: G04013, doi:10.1029/2012JG002132.
See - Research Spotlight - EOS 94: 26 Feb 2013, p96.
Tank, S., L. Lesack, C. Osburn, and R. Hesslein. 2011. Multiple tracers demonstrate distinct sources of dissolved organic matter to lakes of the Mackenzie Delta. Limnol. Oceanogr. 56:1297-1309, doi:10.4319/lo.2011.56.4.1297.
Hopkinson, C. N. Crasto, P. Marsh, D. Forbes, and L. Lesack. 2011. Investigating the spatial distribution of water levels in the Mackenzie Delta using airborne LiDAR. Hydrological Processes 25:2995-3011, doi:10.1002/hyp.8167.
Lesack, L., and P. Marsh. 2010. River-to-lake connectivities, water renewal, and aquatic habitat diversity in the Mackenzie River Delta. Water Resour. Res. 46: W12504, doi:10.1029/2010WR009607.
See - Research Spotlight - EOS 92: 22 Feb 2011, p73.
Gareis, J., L. Lesack, M. Bothwell. 2010. Attenuation of in situ UV radiation in Mackenzie Delta lakes with varying dissolved organic matter compositions. Water Resour. Res. 46: W09516, doi:10.1029/2009WR008747.
Marsh, P., L. Lesack, F. Hicks, A. Roberts, C. Hopkinson, S. Solomon, D. Forbes, M. Russell, and H. Haywood. 2010. Hydrology of the Mackenzie Delta: Off-channel water storage and delta interaction with the Beaufort Sea. Proceedings of the 17th International Northern Research Basins Symposium and Workshop, 2009. p 217-226.
Nafziger, J., F. Hicks, R. Andrishak, P. Marsh, and L. Lesack. 2010. Hydraulic model of river flow and storage effects in the Mackenzie Delta, Canada. Proceedings of the 17th International Northern Research Basins Symposium and Workshop, 2009. p 237-247.
Squires, M., L. Lesack, R. Hecky, S. Guildford, P. Ramlal, and S. Higgins. 2009. Primary production and carbon dioxide metabolic balance of a lake-rich arctic river floodplain: Partitioning of phytoplankton, epipelon, macrophyte, and epiphyton production among lakes of the Mackenzie Delta. Ecosystems 12:853-872. doi:10.1007/s10021-009-9263-3.
Graydon, J., C. Emmerton, L. Lesack, and E. Kelly. 2009. Mercury in the Mackenzie River delta and estuary: Concentrations and fluxes during open-water conditions. Science of the Total Environment 407:2980-2988. doi:10.1016/j.scitoevn.2008.12.060.
Tank, S., L. Lesack, and D. McQueen. 2009. Elevated pH regulates bacterial carbon cycling in lakes with high photosynthetic activity. Ecology 90:1910-1922.
Tank, S., L. Lesack, and R. Hesslein. 2009. Northern delta lakes as summertime CO2 absorbers within the arctic landscape. Ecosystems 12:144-157. doi:10.1007/s10021-008-9213-5.
Emmerton, C., L. Lesack, and W. Vincent. 2008. Nutrient and organic matter patterns across the Mackenzie River, estuary and shelf during the seasonal recession of sea-ice. J. Marine Systems 74:741-755. doi:10.1016/j.jmarsys.2007.10.001.
Emmerton, C., L. Lesack, and W. Vincent. 2008. Mackenzie River nutrient delivery to the Arctic Ocean and effects of the Mackenzie Delta during open water conditions. Global Biogeochemical Cycles 22: GB1024, doi:10.1029/2006GB002856.
Lesack, L., and P. Marsh. 2007. Lengthening plus shortening of river-to-lake connection times in the Mackenzie River Delta respectively via two global change mechanisms along the arctic coast. Geophys. Res. Lett. 34: L23404,doi:10.1029/2007GL031656.
See - Journal Cover Image
Emmerton, C., L. Lesack, and P. Marsh. 2007. Lake abundance, potential water storage, and habitat distribution in the Mackenzie River Delta, western Canadian Arctic. Water Resour. Res. 43: W05419, doi:10.1029/2006WR005139.
Febria, C., L. Lesack, J. Gareis, and M. Bothwell. 2006. Patterns of hydrogen peroxide among lakes of the Mackenzie Delta, western Canadian Arctic. Can. J. Fish. Aquat. Sci. 63:2107-2118.
Spears, B. & L. Lesack. 2006. Bacterioplankton production, abundance, and nutrient limitation among lakes of the Mackenzie Delta (western Canadian Arctic). Can. J. Fish. Aquat. Sci. 63:845-857.
Squires, M.M., & L.F.W. Lesack. 2003. The relation between sediment nutrient content and macrophyte biomass and community structure along a water transparency gradient among lakes of the Mackenzie Delta. Can. J. Fish. Aquat. Sci. 60:333-343.
Squires, M., & L. Lesack. 2003. Spatial and temporal patterns of light attenuation among lakes of the Mackenzie Delta. Freshwater Biol. 48:1-20.
Squires, M.M., & L.F.W. Lesack. 2002. Water transparency and nutrients as controls on phytoplankton along a flood-frequency gradient among lakes of the Mackenzie Delta, western Canadian arctic. Can. J. Fish. Aquat. Sci. 59:1339-1349.
Squires, M.M., L.F.W. Lesack, & D. Huebert. 2002. The influence of water transparency on the distribution and abundance of macrophytes among lakes of the Mackenzie Delta, western Canadian arctic. Freshwater Biol. 47:2123-2135.
Headley, J.V., P. Marsh, C.J. Akre, K.M. Peru, and L.F.W. Lesack. 2002. Origin of polycyclic aromatic hydrocarbons in lake sediments of the Mackenzie Delta. J. Environ. Sci. Health A37:1159-1180.
Squires, M.M., & L.F.W. Lesack. 2001. Benthic algal response to pulsed versus distributed inputs of sediments and nutrients in a Mackenzie Delta lake. J. North Amer. Benthol. Soc. 20:369-384.
Michelutti, N., M. Hay, P. Marsh, L. Lesack, & J. Smol. 2001. Diatom changes in lake sediments from the Mackenzie Delta, NWT, Canada: Paleohydrological applications. Arctic, Antarctic, and Alpine Research 33:1-12.
Marsh, P., L. Lesack, & A. Roberts. 1999. Lake sedimentation in the Mackenzie Delta, NWT. Hydrol. Process. 13:2519-2536.
Lesack, L.F.W., P. Marsh, and R.E. Hecky. 1998. Spatial and temporal dynamics of major solute chemistry among Mackenzie Delta lakes. Limnol. Oceanogr. 43:1530-1543.
Rouse, W., M. Douglas, R. Hecky, A. Hershey, G. Kling, L. Lesack, P. Marsh, M. McDonald, B. Nicholson, N. Roulet, and J. Smol. 1997. Effects of climate change on the freshwaters of arctic and subarctic North America. Hydrological Processes 11:873-902.
Hay, M.B., J.P. Smol, K.J. Pipke, and L.F.W. Lesack. 1997. A paleohydrological model for the Mackenzie Delta, NWT (Canada): A diatom-based approach for evaluation of past river discharge. Arctic and Alpine Research 29:430-444.
Marsh, P., and L.F.W. Lesack. 1996. The hydrologic regime of perched lakes in the Mackenzie Delta: Potential responses to climate change. Limnol. Oceanogr. 41:849-856.
Roberts, A.C.B., C. Kirman, and L.F.W. Lesack. 1995. Suspended sediment concentration estimation from multispectral video imagery. Int. J. Remote Sensing 16:2439-2455.
Roberts, A., K. Bach, C. Kirman, L. Lesack, & P. Marsh. 1995. Multitemporal classification of flood parameters in the Mackenzie Delta from airborne MSV & SAP imagery. p.127-136, Application of Remote Sensing in Hydrology: Proc. Second Internat. Remote Sensing Symp. NHRI Symp. No. 14.
Marsh, P., L.F.W. Lesack, and A.C.B. Roberts. 1994. The environmental effects of ice jam flooding on lakes in the Mackenzie Delta. p.359-381, Proceedings of the Workshop on Environmental Aspects of River Ice. Environ. Can., NHRI Symp. No. 12, Aug. 1993, Saskatoon.
Pomeroy, J.W., P. Marsh, and L.F.W. Lesack. 1993. Relocation of major ions in snow along the Tundra-Taiga ecotone. Nordic Hydrology 24:151-168.
Marsh, P., and L.F.W. Lesack. 1993. The effect of environmental change on the hydrologic regime of lakes in the Mackenzie Delta. p.339-358, IN Prowse, T.D., C.S.L. Ommanney, and K.E. Ulmer (eds.), 9th International Northern Research Basins Symposium. Environ. Can., NHRI Symp. No. 10, August 1992, Whitehorse, Yukon.
Lesack, L.F.W., Marsh, P., and R.E. Hecky. 1991. Ice cover growth and freeze-out of solutes in a Mackenzie Delta lake. p.219-236, IN Prowse, T.D., and C.S.L. Ommanney (eds.), Northern Hydrology: Selected Perspectives. Environ. Can., NHRI Symp. No. 6, July 1990, Saskatoon.
Lesack, L.F.W., Hecky, R.E., and P. Marsh. 1991 The influence of frequency and duration of flooding on the nutrient chemistry of Mackenzie Delta lakes. p.19-36, IN Marsh, P., and C.S.L. Ommanney (eds.), The Mackenzie Delta: Environmental Interactions and Implications of Development. Environ. Can., NHRI Symp. No. 4, Oct. 1989, Saskatoon.
Lesack, L., & J. Melack. 1996. Nutrient balance of a rainforest catchment in the central Amazon Basin: Implications for nutrient budgets in tropical rainforests. Biogeochemistry 32:115-142.
Lesack, L. 1995. Seepage exchange in an Amazon floodplain lake. Limnol. Oceanogr. 40:598-609.
Lesack, L.F.W., and J.M. Melack. 1995. Flooding hydrology and mixture dynamics of lakewater derived from multiple sources in an Amazon floodplain lake. Water Resour. Res. 31:329-345.
Lesack, L.F.W. 1993. Water balance and hydrologic characteristics of a rainforest catchment in the central Amazon Basin. Water Resour. Res. 29:759-773.
Lesack, L.F.W. 1993. Export of nutrients and major ionic solutes from a rainforest catchment in the central Amazon Basin. Water Resour. Res. 29:743-758.
Lesack, L., and J. Melack. 1991. The deposition, composition, and potential sources of major ionic solutes in rain of the central Amazon Basin. Water Resour. Res. 27:2953-2978.
Fisher, T.R., Lesack, L.F.W., and L.K. Smith. 1991. Input, recycling, and export of N and P on the Amazon Floodplain at Lake Calado. p.34-53, IN Tiessen, H., D. Lopez-Hernandez, and I.H. Salcedo (eds.), Phosphorus Cycles in Terrestrial and Aquatic Ecosystems. SCOPE Regional Workshop Proceedings: South and Central America, December 1989, Maracay, Venezuela.
Crill, P.M., Bartlett, K.B., Wilson, J.O., Sebacher, D.I., Harriss, R.C., Melack, J.M., MacIntyre, S., Lesack, L.F.W., and L. Smith-Morrill. 1988. Tropospheric methane from an Amazonian floodplain lake. J. Geophys. Res. 93:1564-1570.
Lesack, L.F.W. 1986. Estimates of catch and potential yield for the riverine artisanal fishery in The Gambia, West Africa. J. Fish Biol. 28:679-700.
Lesack, L.F.W., Melack, J.M., and R.E. Hecky. 1985. Transport of organic carbon in the Gambia River, West Africa. IN Degens, E.T., Kempe, S., and R. Herrera (eds.), Transport of Carbon and Minerals in Major World Rivers, Pt.3, Mitt. Geol.-Palaont. Inst. Univ. Hamburg, SCOPE/UNEP Sonderbd. 58:431-434.
Lesack, L.F.W., Hecky, R.E., and J.M. Melack. 1984. Transport of carbon, nitrogen, phosphorus, and major solutes in the Gambia River, West Africa. Limnol. Oceanogr. 29:816-830.
Bodaly, R.A., and L.F.W. Lesack. 1984. Response of a boreal northern pike (Esox lucius) population to lake impoundment: Wupaw Bay, Southern Indian Lake, Manitoba. Can. J. Fish. Aquat. Sci. 41:706-714.