PEARL  Paleoecological Environmental Assessment and Research Laboratory

Department of Biology, Queen's University, Kingston ON, Canada, K7L 3N6

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Some Former Students / Researchers


Stephanie Pegler- Assessing the response of metal contamination and remediation efforts of mining-impacted lakes in Sudbury.


Casey Loudoun- I have a growing interest in Limnology and am currently doing my undergrad thesis on a recreational fishing lake, using midge remains to identify past oxygen profiles.










Winnie Deng- Exploring the urban/rural environmental differences between pre-industrial and post-industrial Southern Ontario Lakes.


Clare Nelligan- Assessing long-term environmental trends in Ontario lakes that support Lake Trout.



Jamie Summers, PhD- Diatom-based assessments of lakes in the Athabasca Oil Sands Region (AB) exposed to industrial pollution, climate change, and forest fires.



Madi Perrett- Using diatom assemblages to assess the effects of climate change and contaminants in lakes surrounding ConMine, Yellowknife, NWT.

Maddie Stein- Understanding changes in subfossil Cladocera in response to multiple stressors at Pigeon Lake.


Jennie Moe- Using chironomid assemblages to reconstruct long term deep water oxygen conditions in Limerick Lake.


Allison Covert- Investigating long-term changes in Chrysophyte assemblages in lakes in the Adirondacks

Julie Johannessen- Tracking the long-term development of shallow oligotrophic lakes using algal assemblages within the context of multiple environmental stressors.


Aliya Ali- Analyzing changes in Chrysophyte species in the Adirondacks (Wolf Lake, NY).


Aimee Bertin- Observing changes in cladoceran assemblages from pre-industrialization to modern day, in lakes in the Adirondacks.




Janae Rampone- Assessing changes since Pre-industrial times in cottage lakes in Algonquin Park.




Anya Kochel- A paleolimnological investigation of food-web and carrying capacity changes in Okanagan Sockeye Salmon nursery lakes.


Brett Elmslie- Investigation of the impact of warmer climatic conditions on aquatic life in a small kettle lakes from northern Ontario.



Josh Thienpont, PhD- Working in close collaboration with PEARL at Ottawa U with Prof. Jules Blais











Kathryn Hargan, PhD- Working in close collaboration with PEARL at Ottawa U with Prof. Jules Blais




Guy-Thierry Tenkouano- Arsenic Geochemistry in a Historically Contaminated Lake: Paleolimnological Examination of Moira Lake, Ontario,Canada.



Hillary Quinn-Austin- A chironomid based reconstruction of deep water oxygen conditions over approximately 200 years in Loughborough Lake, Ontario.



Sydney Hennessy- Observing changes between pre-industrial and modern-day cladoceran assemblages in reference lakes at the Experimental Lakes Area (northwestern Ontario).



Charlotte Heller- Using diatom assemblages to examine the hurricane history of Grape Tree Pond, a coastal lagoon in Jamaica.



Mark Giles- Looking for effects of climate change on high-altitude Andean ponds in Ecuador using diatoms as a paleolimnological indicator.



Jianbao Liu- Assessing the influences of climatic change on ecological changes in North China lakes during the last two millennia using sedimentary diatom assemblages.



Chelsea Cheng



Leticia Rizzetto





Liang Zhu- Using paleolimnological indicators to track the effect of highway construction on sub-arctic lakes.


Andrea Zemanek- Using chironomids to track deepwater oxygen changes in Osoyoos Lake, B.C.





Mina Vu- Analyzing the environmental impact of Double-crested cormorants and Ring-billed gulls on Lake Ontario bird ponds using paleolimnological techniques.





Hannah Rundle-Investigating the timing and potential drivers of the shift from unicellular to colonial scaled chrysophytes (specifically Synura petersenii) in sediment cores from minimally disturbed lakes in the Adirondacks.




Olivia Pink- Using chironomid assemblages to assess the past deep water oxygen concentrations of Tadenac Lake, ON, to determine if changes over time have impacted the Lake Trout population.


Donna Paznar- Holocene perspective of changes in cladocera from Wolf Lake in the Adirondacks.

Donna P




Sari Ohsada-






Paul Kraly- Timing of the shift from unicellular Mallomonas taxa to colonial Synura sphagnicola chrysophytes in a minimally-disturbed lake; Adirondack Lake.


Dara Corrigan- Assessing past deep water oxygen availability of Peninsula Lake (ON) using chironomid assemblages.




Jessica Almeida- Investigating the application of chironomids as an indicator of past oxygen levels.


Rachael Melnik-Proud- Diatoms as indicators of environmental and climatic change in High Arctic ponds. Specifically in the Cape Herschel area.




Kris Hadley- Working in close collaboration with PEARL at Hutchinson Environmental Sciences Ltd. Kitchener, ON











Jenny Korosi- Currently an assistant professor at York University









Katie Griffiths - Heterogeneity in northern climate trends: Assessing the role of glacial modulation.


Mackenzie Waller-Predicting the occurrence of nuisance algal blooms (cyanobacteria) in Lake St. Francis through the study of watershed and limnological features, as well as GIS derived metrics.Makenzie














Laura Redmond- The effects of calcium decline on cladoceran assemblages of Crosson Lake, Ontario:  Have low calcium conditions favoured Holopedium glacialis?



Kelly Rentz- Looking at the relative abundances of diatoms throughout the last 10,000 years of sediment accumulation at Lake of the Woods and to determine whether changes in assemblage composition track the environmental history of lake development including changes in climate​.



Spencer Yakaback- The use of paleolimnological techniques to track the impacts of Dorset-Paleoeskimos on a freshwater lake near Port au Choix, Newfoundland, Canada.


Emma Pascoe- Analyzing water quality in Lake Simcoe through the Holocene using diatom assemblages.




Gladys Kong- Analysis of macroscopic charcoal to characterize fire history in the Adirondacks and assess the utility of charcoal morphotype analysis.


Kelli Charbonneau- SWEP


Kristen Coleman- Assessing ecological changes and their impacts on mercury transport in Northern Boreal lakes using sedimentary diatom assemblages.


Research Technician

Esteban Camilo Rodriguez Pinto, MSc

Phone: (+1) 613-533-6000 ext 75221



Moumita Karmakar- Understanding changes in water quality and quantity from northwestern Ontario over millennia: A multiproxy paleolimnological perspective. E-mail


Joshua Kurek, PhD- Aquatic invertebrates and environmental change.
 Josh Kurek







Assistant Professor
Mount Allison University
Geography & Environment
Avard-Dixon Building144 Main St.,
Sackville, NB E4L 1A7
joshua.kurek [at]


Erin Neville- Long-term response of chironomids to environmental change in the Athabasca oil sands region.


Brendan Wiltse - Determining the role of climate on recent changes in algal communities in boreal lakes.E-mail












Zara Jennings- Assessing the impacts of mining on heavy metal concentrations and chironomid assemblages in a Sudbury region lake.


Rebecca Hansford-Assessing possible climate-related shifts in pollen and charcoal assemblages in Wolf Lake (Adirondack Park, NY) during the Hypsithermal.



Vanessa Bourne- Using Chironomid Assemblages to Asses the Impacts of Uranium Mining on Surrounding Lakes, in Northern Saskatchewan.


Kristina Arseneau - Acidification and climate warming: a multi-proxy paleolimnological study assessing the response of Adirondack (NY, USA) lakes to regional anthropogenic stressors. E-mail


Cassandra Cummings- Using paleolimnology to assess changes in chrysophyte species assemblages in Wolf Lake (NY, USA), and Adirondack 'Heritage Lake'.


Diana Zeng- DDT use at the '67 World Expo.


Todd French- Spatial and temporal trends in contaminant concentrations in Great Lakes fishes, with emphasis on identified areas of concern.E-mail 


Maddy Sugar-Diatom assemblages in Sverdrup Pass pond sediments.


Jordan D. Suffel- Analysis of Cladoceran species assemblages in Wolf Lake (NY, USA) to assess fluctuations in lake water Ca levels related to industrial acid deposition.


Sarah Shenstone-Harris-Assessing the impacts of seabird-derived nutrient inputs on islands in the Great Lakes, using sedimentary diatom assemblages



Colin Robinson- Analysis of diatom species in Wolf Lake (NY, USA) to assess ecological responses to mid-Holocene climate warming.









M. Sinead McGowan- Patterns in diatom and chrysophyte assemblages across a gradient of water depth in an Adirondack Lake.


Jill Lemmen- Using chironomid-based paleolimnology to track recent environmental change in the Ecuadorian Andes.


Michelle Lavery- An analysis of past climate in Eastern Quebec using preserved diatom assemblages in lake sediments










Mark Kelly- Impacts of acidification on the movement of mercury from sediment into biota.E-mail

Larkin Mosscrop - Cladoceran communities of small, shallow lakes. Website



Angelo Sorce - A paleolimnological investigation of ecological responses to climate change and a piscivore manipulation in Mouse and Ranger lakes, Ontario
Angelo at work


Jennifer Barrow- A paleolimnological investigation using diatom assemblages to disentangle the long-term impacts of acidification and calcium decline in softwater lakes of Central Ontario, Canada.


Reba McIver- Diatoms as indicators of recovery from hyper-eutrophication in high arctic ponds.

Katherine Mataya


Iain MacKenzie- A paleolimnological investigation of eutrophication and recovery in Lake Washington (Seattle, WA).


Elisa Cheng- A paleolimnological assessment of the response of Arctic lakes in the Mackenzie Delta uplands (NT, Canada) to failed drilling-mud sumps.

Chris Ng- Diatoms as a paleolimnological confirmation of climate change in the Adirondacks, New York.







Kathryn McCleary- An Evaluation of Climate Change and Eutrophication in a High Arctic Lake.






Karlee Flear- A paleolimnological investigation of chrysophytes and chironomids in the Experimental Lakes Area.









Susan Ma-    Assessment of water availability of southern lakes in the Winnipeg River Drainage Basin over the past 2 Millennia to determine the susceptibility of this basin to synchronous droughts.


Robyn Laing- A paleolimnological assessment of the impacts of anthropogenic disturbances on chrysophyte diversity in the Winnipeg River Drainage basin.


Daniel Johnson- Paleolimnological investigation of diatoms in dead zone lakes of the Western Canadian Arctic.


Kayla Deasley- A paleolimnological investigation of Cladocera in the dead zone of the Western Canadian Arctic.


Ayla Fenton

Melanie Shapiera- Calcium effects in softwater lakes: Investigating changes in zooplankton community structure.


Heather Haig - Analysis of drought susceptibility and water variability of northern lakes within the Winnipeg River drainage basin over the past two millennia to determine synchronicity water levels.


Alexandra Rouillard - Paleolimnological assessment of environmental changes occurring on Pim Island, Nunavut, High Arctic Canada










Jessica Hawryshyn - Paleolimnological diatom reconstruction of water-quality changes related to multiple stressors in Lake Simcoe, Ontario. E-mail










Crystal Hyatt - A diatom-based paleolimnological investigation of environmental change in Lake of the Woods, Ontario. E-mail







Samantha Burke - A paleolimnological investigation of changes in cladoceran size structure in Lake George, Nova Scotia due to recent anthropogenic warming.


Holly Nesbitt - A paleolimnological investigation of diatoms in the dead zone of the Western Canadian Arctic.







Melanie Kingsbury - Determining the characteristics that define the ecotone boundary between benthic and planktonic diatom communities in boreal lakes in North-western Ontario.
Website E-mail


Alexandra Gerber - A paleoecological study of fire regime during the Holocene in St. Lawrence Islands National Park, Southeastern Ontario using the charcoal record.







Melissa Moos -  Paleolimnological Investigation of Holocene Level Climate Regimes in Lake 239 (Experimental Lakes Area, NW Ontario). E-mail






Kim Sontag- Tracking the Effects of Acidification and Recovery on Aquatic Invertebrates in the Wawa and Sudbury Regions.E-mail
Phone: 613-533-6000 Ex. 77380






Suzie Ellwood - Reconstructing Holocene fire history in Southeastern Ontario through an investigation of sedimentary charcoal.






Thiyake Rajaratnam- Assessment of environmental changes in Halifax over the last 150 years using sub-fossil diatom assemblages.








Alyson Paul - A diatom-based paleolimnological investigation of long-term climate change in Canada's arctic tundra.








Lindsay Brager - Assessment of the extent of biological recovery of Big Moose Lake, NY from acidification using chrysophytes as paleoecological indicators.





Jaclyn Brash -






Carole Chueng- Scaled chrysophytes as indicators of taste and odour water issues in Ontario lakes.


Ashley Jenkin - Contrasting the Effects of Nutrient Additions Versus Climate Change in Forrest Island,  Lake of the Woods, ON






Mark Katchouni - Assessment of scaled Chrysophytes in Arpin Lake from pre-industrial to recent times (NW Ontario).






Ian Watson - Aquatic osteoporosis in the Experimental Lakes Area using cladocerans as an indicator.






Clair Broughton - Climate change effects on diatom community structure in northwestern Ontario.








Cheryl Wilson - Multiple generations of interglacial lake sediment preserved beneath the Laurentide Ice Sheet: a paleolimnological reconstruction of Lake CF8, Baffin Island.






Chris Lorenz - Fire-climate relationship at the forest-prairie ecotone in Alberta, Canada.








Christine Greenaway - Diatoms and scaled-chrysophytes as indicators of biological recovery from acid rain in lakes near Wawa, Ontario.






Amy Tropea- Diatoms and scaled chrysophytes as indicators of biological recovery from acidic deposition in Sudbury, Canada.








Kyle McIver - A paleolimnological investigating of a possible calcium concentration tipping point in Cladocera communities in Nova Scotia.

Kyle McIver


Karen Ross - The extent of biological recovery of Big Moose Lake, NY from acidification.

Karen Ross


Daniel Selbie- Paleolimnological reconstructions of long-term sockeye salmon population dynamics in the U.S. Pacific Northwest, British Columbia and Yukon Territory in relation to human and natural forcing mechanisms.


Brian Ginn-
Assessment of water quality in Nova Scotia using diatoms as paleoecological indicators. 


Isla Milne - A high-resolution fossil diatom record of climate and environmental change in equatorial East Africa over the past 21,000 years.






Bronwyn Keatley - Diatoms as indicators of environmental change from three distinct ecosystem types in the Canadian High Arctic.

Pic of Bronwyn


Jeannine St. Jacques - Drought variability in the North American Great Plains during the last 1500 years.

Pic of Jennine



Shelley Wilkinson- Assessing the relationship between sedimentary charcoal, climate, and recorded fires events







Christina Clark-









Erin MacMillan- A spatial scale approach to the analysis of primary and secondary transported charcoal.


Mihaela Enache, PhD - Climate and fire dynamics.







Astrid Michels, PhD






Jen Bondy - Tracking past sockeye salmon presence in relation to oral tradition from a remote sub-arctic lake (Yukon Territory, Canada)






Anne Harris - Impacts of Environmental Stressors on Lakes of New Brunswick, Canada: A Paleolimnological Assessment    

Allison Foster-

Crystal Lai - The Effects of Zebra Mussels and Elevated Temperature on Zooplankton Assemblage in Two Eastern Ontario Lakes






Laura Grace - Assessing Environment Change in three Atlantic Whitefish (Coregonus huntsmani) Lakes in Nova Scotia, Canada using Paleolimnological Techniques.

Sergi Pla, PhD-








Kyle Gervais- The Effects of Zebra Mussel (Dreissena polymorpha) Predation on Seasonal Phytoplankton Succession in Lake Opinicon, Ontario.






Erica Johnson - Fossil chironomids as indicators of environmental change in Russell Lake, Halifax, Nova Scotia, Canada.

Elyse LaFace -  Cladocera as paleolimnological indicators of recent warming in subarctic Canada

Nafisha Lalani - Assessing the Role of Epilithic Diatoms as Indicators of Nutrient Enrichment at Cape Vera, Devon Island, Canadian High Arctic







Laura Schrumm / Lawlor -  Chironomids: Indicators of hypolimnetic oxygen change
in Nova Scotian Brook Trout lakes.






Jon Sweetman, PhD - Aquatic invertebrates and climate change in Arctic and Subarctic regions.





Link to List of Current Students