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High-Latitude Responses of Diatom and Chironomid Assemblages to Regional Climate Changes and Other Environmental Stressors
(2015-07-03)
High-latitude freshwater ecosystems are amongst the most vulnerable to climate change impacts. However, the response to warming is rarely straightforward and may be modulated by local or regional factors, producing variability ...
Assessing Diatom Shifts in Embayments and Lakes in and Around Georgian Bay (Lake Huron) Using Paleolimnology
(2016-04-22)
Freshwater ecosystems in Ontario are affected by a growing number of multiple stressors, with climate change often acting as a “threat multiplier”. Diatom-based paleolimnological approaches are used to provide the much ...
A comparative paleolimnological assessment of the influences of early Arctic population groups on freshwater ecosystems from southern Baffin Island, Nunavut
(2011-10-04)
Recent paleolimnological research in the eastern Canadian high Arctic on the ecological impact of the Thule c.1000-1500 AD has documented the influence of prehistoric anthropogenic activities. Six lake and pond sites ...
Changes in Scaled-Chrsyophyte Assemblages in Response to Recent Climate Change in Northwestern Ontario
(2011-09-30)
A two-part paleolimnological study was conducted to: i) understand the important factors that are related to the present-day distribution of scaled-chrysophytes; ii) investigate changes in the scaled-chrysophyte assemblages ...
Biomanipulation in two Ontario Precambrian Shield lakes: a multi-proxy paleolimnological analysis
(2012-10-18)
Food web biomanipulations provide the means to partly control water quality problems (i.e. algal blooms) in lakes by altering internal ecological mechanisms. However biomanipulation mechanisms are complex and the results ...
Importance of Climate on Boreal Lakes from Northwest Ontario Over Millennia: A Paleolimnological Perspective
(2014-12-08)
The lack of long-term data on the response of boreal lakes to climate change has been seen as an impediment to the assessment of the vulnerability and risks that northwest Ontario faces in light of future climate change. ...
Diatoms as Bioindicators of Environmental Change in Cape Herschel and Pim Island (Nunavut, Canada) Ponds
(2016-02-29)
The High Arctic is especially sensitive to climatic change, but typically direct long-term monitoring data are lacking. Instead, paleolimnological approaches are now widely used to reconstruct past environmental changes. ...
Divergent fish mercury trends in two South-Central Ontario lakes and the relationship to changes in atmospheric sulfate deposition
(2013-01-11)
Environmental conditions can lead to mercury accumulations in fish that are highly variability among spatially close lakes in Ontario, Canada. Mercury methylation caused by sulfate reduction can influence total mercury ...
Acidification and Climate Warming: Understanding the Impact of Multiple Anthropogenic Stressors on Adirondack (NY, USA) Lakes
(2014-05-05)
Lakes in the Adirondack Park (NY, USA) are undergoing chemical recovery from acidification. There is now a pressing research need to define recovery targets for acid-impacted sites. Researchers attempting to designate such ...
Assessing Biological Recovery of Cladocera from Sudbury-Area Lakes Using Paleolimnology
(2014-04-28)
Lakes near Sudbury, Ontario, experienced widespread acidification and metal-contamination beginning in the late-19th century. These stressors caused extreme damage to regional aquatic systems and their catchments, with ...