Dr. Maggie Xenopoulos

I am a full Professor in the Department of Biology and Tier 1 Canada Research Chair in Global Change of Aquatic Ecosystems. I am also currently the Editor in Chief of JGR: Biogeosciences, and serve on the Science Advisory Board of the International Joint Commission.

Prior to that, I held a University Faculty Award position from Canada’s Natural Sciences and Engineering Research Council (NSERC), was the recipient of the Early Researcher Award from the Ontario Ministry of Research and Innovation, and from 2017-2020 was Deputy Editor in Chief of Limnology and Oceanography.

I was born in Montréal where I completed a B.Sc. (1995) at the Université du Québec à Montréal (UQAM). I completed an MSc (1997) under the supervision of Dr. David Bird at UQAM followed by a PhD (2001) with Dr. David W. Schindler from the University of Alberta.

Before arriving at Trent University, I was an NSERC postdoctoral fellow (2001-2004) in the lab of Dr. David Lodge at the University of Notre Dame, USA.


Current Lab Members

Nolan Pearce

Nolan Pearce

Research Associate

(2022 – in progress)

Nolan is a limnologist and geographer interested in the biogeochemical processes that influence nutrient and carbon dynamics in aquatic ecosystems and how the composition/balance of macronutrients influences ecosystem structure and function.

Most Shirina Begum

Most Shirina Begum

Postdoctoral Fellow

(2023 – in progress)

I am interested in exploring inland water biogeochemistry particularly how anthropogenic activities and changing climate affect processing of dissolved organic matter and greenhouse gas.

Sandra Klemet-N’Guessan

Sandra Klemet-N’Guessan

PhD Student

(2018 – in progress)

My research explores the role of aquatic animals in the cycling of nutrients and carbon in streams and lakes. I am specifically interested in the nonlinear relationships between ambient dissolved organic matter concentration and composition and animal-mediated elemental recycling.

Claire Stevens

Claire Stevens

PhD student

(2020 – in progress)

My research interests center around the protection of water quality, particularly in urban ecosystems. I primarily study early warning signals of harmful algal blooms, and aim to use the detection of critical transitions in bloom forecasting. I am also interested in winter limnology and the role of ecological memory in aquatic ecosystems.

James Kelley

James Kelley

PhD student

(2021– in progress)

My research background is in waterfowl ecology, specifically modelling migration phenology and population trends. During this work, I learned of the many critical ecological functions freshwater ecosystems provide and have decided to expand my research interests into this field. My PhD will focus on investigating how human activities, such as changes in land use, are impacting metabolism in freshwater ecosystems.

Sasindu Gunawardana

Sasindu Gunawardana

PhD student

(2022 – in progress)

I’m interested in studying ecosystem metabolism in the Great Lakes. I primarily use high-frequency data collected by Autonomous underwater vehicles (AUV’s) to model primary productivity and ecosystem respiration of each Great Lake, which enables me to provide spatially and temporally integrated estimates for large lake ecosystems.

Sherryann Prowell

Sherryann Prowell

PhD student

(2023 – in progress)

My research interest is to explore the dynamics of oxygen depletion and its association with carbon dynamics in lakes. Central to my research is unraveling the relationships between deoxygenation, dissolved organic matter, and their potential effects on greenhouse gas emissions.

Anthony Arsenault

Anthony Arsenault

MSc student

(2021 – in progress)

I am studying spatial and seasonal trends in dissolved organic matter composition at the IISD Experimental Lakes Area and examining how these trends relate to various lake and watershed characteristics. Additionally, I’m studying dissolved organic matter composition patterns in lake ice in the Laurentian Great Lakes. My research interests revolve around understanding linkages between terrestrial and aquatic ecosystems.

Carolina Koebel

Carolina Koebel

MSc student

(2023 – in progress)

My research looks to identify factors influencing Lake Erie algae toxin production. Primarily, I am studying dissolved nutrient ratios (nitrogen to phosphorus) and the resulting microcystin concentrations, nutrient uptake, and phytoplankton community composition.

Miracle Denga

Miracle Denga

BSc Honour’s thesis student

(2023 – in progress)

I am interested in understanding the dynamics of oxygen in lake hypolimnia and the drivers behind its depletion rates. My undergraduate research thesis explores and characterises these factors underlying the depletion rates of dissolved oxygen in the deep-waters of lakes.

Courtney Arnestad

BSc student

Victoria Allicock

BSc independent study

Past Lab Members


Postdoctoral Researchers

  • Nolan Pearce (2020-22); currently Research Specialist, Ontario Ministry of Natural Resources and Forestry
  • Christina Fasching (2017-20); currently Research Scientist, Philipps-Universität Marburg Germany)
  • Kern Lee (2015-17); currently Research Scientist, Alberta Government
  • Stephen Oni (2016-18); currently Data Scientist
  • Richard Vogt (2014-16)
  • Beth Norman (Nee Cheever) (2012-14); currently Director of Science and Research, Lacawac Biological Station
  • Emily Porter-Goff (2011-13); Education Program Coordinator, USDA Natural Resources Service Center, Vermont
  • Clayton Williams (2008-12); currently Assistant Professor, St. Michael’s College
  • Matthew Roberts (2008-10); currently Fish Biologist, Mississippi Natural History Museum
  • Daniel Spooner (2007-10); currently Professor, Lock Haven University
  • Victor Evrard (2007-08); currently Research Specialist, University of Hawaii
  • Daelyn Woolnough (2006-08); currently Associate Professor, Central Michigan University


  • Katarina Cetinic (2012-19); currently Ruđer Bošković Institute, Zagreb, Croatia
  • Daniel Rearick (2013-17); currently New York State Department of Environmental Conservation, Division of Water
  • Marisha Lamond (2010-23); currently Academic Skills Instructor, Trent University
  • Pranab Das (2008-13); Research Project Manager, Chemical Engineering, Queen’s University
  • Christina Fridgen (2008-15; ABD); currently Academic Advisor, Trent University
  • Henry Wilson (2005-09) currently Research Scientist, Agriculture and Agri-Food Canada
  • Michael White (2005-09) currently Senior Scientist and Project Manager, EcoReg Solutions

Lab Managers and Research Associates

  • Oghenemise Abirhire (2020-21)
  • Sarah D’Amario (2018-20)
  • Sarah King (2016-18)
  • Andrew Scott (2007-16)
  • Melanie Kingsbury (2006-08)


  • Matthew Soares-Paquin (2020-22)
  • Meredith Kadjeski (2017-20)
  • Jessica Dyczko (2014-19); currently Technical Specialist, Ontario Ministry of Natural Resources and Forestry
  • Sarah King (2014-23); currently Technical Specialist, Ontario Ministry of Natural Resources and Forestry
  • Sarah D’Amario (2015-18); currently home business
  • Ceara Talbot (2016-18); currently Postdoctoral Fellow, Carnegie Mellon University
  • Jennifer Vincent (2012-15); currently Regional Fish Biologist, State of Idaho
  • Mallory Nadon (2011-14); currently Regional Species at Risk Specialist, Ontario Ministry of Natural Resources and Forestry
  • Lisa Graham (2011-14); currently Aquatic Science Analyst, Ontario Ministry of Natural Resources and Forestry
  • Rathika Balthasar (2008-11); currently PhD student, Trent University
  • Aisha Chiandet (2007-09); currently Water Scientist, Severn Sound Environmental Association

BSc Honour’s Theses and NSERC USRA Projects

  • Carolina Koebel, BSc (2022-23); currently MSc student, Trent University

  • Emily Yeung, BSc (2020-21); currently MSc student, Dalhousie University

  • Elizabeth Rohde, USRA/BSc (2020-21); currently MSc student, Occupational Therapy, McMaster University

  • Marina Taskovic, USRA/BSc (2018-20); currently, PhD student, University of Alberta

  • Lauren Beauchamp, BSc (2018-19)

  • Nicholas Nelson, BSc (2018-19)

  • Christian Akotoye, USRA/BSc (2017-18); currently Medical School in the USA

  • Peter Silk, USRA/BSc (2017-18)

  • Ty Gerhke, USRA (2017-18)

  • Sabateeshan Mathavarajah, USRA (2016-18); currently postdoctoral fellow, Harvard University

  • Katie Musial, USRA (2015-16), currently Medical School, Poland

  • Joseph Tonin, BSc (2015-16); currently Aquatic Biologist, Stantec

  • Andrew Darcy, BSc (2015-16); currently Fisheries Technician, Fisheries and Oceans Canada

  • Kelsey Marwood, BSc (2014-15)

  • Erin Hayward, BSc (2014-15)

  • Sarah D’Amario, USRA (2013-15); currently home business

  • Paul Finigan, BSc (2012-13)

  • Laura Tessier, BSc (2012-13); currently Stock Assessment Biologist, Fisheries and Oceans Canada

  • Kate Doughty, BSc (2011-12); currently Managing Consultant and GIS specialist, Ricondo & Associates, Inc.,Chicago

  • Myra Juckers, USRA/BSc (2010-12); currently Environmental Officer, First Nation (Tobacco Plains Indian Band)

  • Robert Buchkowski, USRA (2009-11); currently Canada Research Chair and Assistant Professor, University of Western Ontario

  • Elysabeth Théberge, USRA/BSc (2009-11)

  • Graham Irvine, BSc (2009-10); currently Research Technologist, Natural Resources Canada

  • Jennifer VanEindhoven, BSc (2009-10)

  • Olisemeke Enubuzor, BSc (2008-09)

  • Olivia Puckrin, BSc (2008-09); currently Director of Sales Development Salesforce, Denver

  • Betty Luu, USRA (2008-09)

  • Jacob Brownscombe, BSc (2008-09); currently Research Scientist , Fisheries and Oceans Canada

  • Lindsey Waterworth, BSc (nee McAlister) (2007-08); currently Senior Ecologist, Beacon Environmental

  • Heather Foy, BSc (2007-08)

  • Stephanie Lyons, BSc (2006-07)

  • Joseph Norman, USRA (2006-07); currently Research Associate, Sick Kids Hospital

  • Jessica Plourde, USRA, BSc (2006-07)

  • Paul Heydon, BSc, (2005-06)

  • Kyla Warren, BSc (2005-06); currently Environmental Assessment Biologist at Skeena Fisheries Commission

  • Leah James, BSc (2004-06); currently lead Aquatic Biologist, WSP

Technicians, Research Assistants and Other BSc Students

  • Courtney Arnestad, BSc summer student (2023-24)

  • Niamul Haque, research assistant (2023)

  • Helen Zheng, BSc summer student (2022-23)

  • Miracle Denga, BSc summer student (2022)

  • Clare Taylor, BSc summer student (2022)

  • Emma Vokey, BSc summer student (2021)

  • Sinead Addis, BSc summer student and independent study (2021-22)

  • Katelyn Doughty, SH Intern (2014-15)

  • Nicole Novodvorsky, SH Intern (2012-13)

  • Michelle Marcus, SH Intern (2008)

  • Sarah Nienhuis, Research Assistant (2008-10)

  • Darren Doherty, SH Intern (2007 )

  • Naheed Mirebrahimi, BSc Summer student (2007)

  • Jasmine Hamilton, BSc Summer student (2007)

  • Ryan Kelly, BSc Summer student (2007)

  • Cassandra Borm, BSc Summer student (2006)

  • Stephen McCarthy, BSc Summer student (2006)

  • Laura Hansen, BSc Summer student (2005-06)

  • Kristy Hogsden, research assistant (2004-06)