Marguerite A. Xenopoulos
Associate Professor
NSERC University Faculty Award

B.Sc., M.Sc. (Université du Québec à Montréal), Ph.D. (University of Alberta) Office: LHS  D238 Phone: 705-748-1011 ext. 7699 Lab: ESC A146 ext.7675          ESC A143 ext. 7676 Email: mxenopoulos@trentu.ca Webpage: http://people.trentu.ca/mxenopoulos Lab: LHS D233,D234,D239

Research interests:
Stream and Lake Ecology
Global change
Biogeochemistry

My research examines how human activities (e.g., climate change, eutrophication, land use) affect ecosystem structure and function in lakes and rivers. I’m also interested in how land use affects the material (e.g., dissolved organic carbon, nutrients) exported and processed in aquatic ecosystems.

Teaching:
BIOL/ERSC 2260H: Introductory Ecology
BIOL 3050H: Limnology
BIOL/ERSC 4330H: Global Change of Aquatic Ecosystems

Selected publications  

Spooner, D.E., M.A. Xenopoulos, C. Schneider and D.A. Woolnough. 2011. Co-extirpation of host-affiliate relationships in rivers: The role of climate change, water withdrawal, and host-specificity. Global Change Biology 17: 1720-1732.

Wilson, H.F. and M.A. Xenopoulos. 2011. Nutrient recycling by fish in streams along a gradient of agricultural land use. Global Change Biology 17: 130-139.

White, M.S., M.A. Xenopoulos, R.M. Metcalfe and K.M. Somers. 2010. On the role of natural water level fluctuations in structuring littoral benthic macroinvertebrates in lakes. Limnology and Oceanography 55: 2275-2284.

Williams, C.J., Y. Yamashita, H.F. Wilson, R. Jaffé, and M.A. Xenopoulos. 2010. Unraveling the role of land use and microbial activity in shaping dissolved organic matter in stream ecosystems. Limnology and Oceanography 55: 1159-1171.

Xenopoulos, M.A., P.R. Leavitt and D.W. Schindler. 2009. Ecosystem regulation of boreal lake phytoplankton by ultraviolet radiation. Canadian Journal of Fisheries and Aquatic Sciences 66: 2002-2010.

Wilson, H.F., and M.A. Xenopoulos. 2009. Effects of agricultural land use on the composition of fluvial dissolved organic matter. Nature Geoscience 2: 37-41.

Xenopoulos, M.A. and D.M. Lodge. 2006. Going with the flow: using species-discharge relationships to forecast losses in fish biodiversity. Ecology 87: 1907-1914.

Dobson, A., D. Lodge, J. Alder, G. Cumming, J. Keymer, J. McGlade, H. Mooney, J.A. Rusak, O. Sala, D. Wall, V. Wolters and M.A. Xenopoulos. 2006. Habitat loss, trophic collapse and the decline of ecosystem services. Ecology 87: 1915-1924.

Information for prospective students:
My research is interdisciplinary and I expect students in my lab to master a range of numerical techniques and analytical chemistry skills (or be willing to learn them). Generally, students in my lab are encouraged to develop independent scientific research and be highly motivated. If you select a field of study that you are not really interested in, the temptation to drop out when things become difficult will be high. I welcome any inquiries from students with backgrounds in ecology, environmental sciences, environmental chemistry or geography.  Students are encouraged to employ field, laboratory and theoretical approaches to their work.