Norman D Yan
Professor Emeritus, Department of Biology Senior Scholar
Lay Research Summary
My research is currently focuses on five main areas: identifying the key factors that regulate the recovery of lakes from historical damage, attempting to determine the influence of nonindigenous species on Ontario lakes, exploring the influence of climatic change on zooplankton of shield lakes, exp ...read moreloring the influence of Ca concentrations on crustacean zooplankton and finally exploring the interactive impacts of multiple environmental stress on Ontario’s inland lakes. read less
Scientific Research Summary
Canadian ecosystems are currently challenged by many local, regional and global environmental stressors including the introduction of exotic species, climatic change and stratospheric ozone depletion. My career research focus is quantifying the effects of these and other man-made stressors on the li ...read morefe in Canadian Shield lakes, particularly on their animal plankton, or zooplankton. Zooplanktons are good target organisms for such work because of their diverse life styles, ecological responsiveness, and ease of sampling. My broad research focus also reflects my desire to provide information of significance to both ecologists and to lake managers.read less
Changes in water chemistry can disable plankton prey defenses.
Journal: Proc Natl Acad Sci U S A
Application of Biotic Ligand and Toxic Unit modeling approaches to predict improvements in zooplankton species richness in smelter-damaged lakes near Sudbury, Ontario.
Journal: Environ Sci Technol.
An integrated multi-disciplinary approach for studying multiple stressors in freshwater ecosystems: Daphnia as a model organism.
Journal: Integr Comp Biol.
Environmental stability and lake zooplankton diversity - contrasting effects of chemical and thermal variability.
Journal: Ecol Lett.
Baker SL, Yan ND.
Journal: J Am Mosq Control Assoc.
Dr. Norman Yan of York University is conducting research that will enhance our understanding of the direct and indirect effects of Ca decline on the biota, especially the crustacean zooplankton, of Canadian Shield lakes in south-central Ontario in the face of ongoing phosphorus decline, climate change, and the spread of the invading predator Bythotrephes.Dr. Yan will test the hypothesis that Ca decline is a threat to the crustacean zooplankton in Shield lakes; identify the lethal, sub-lethal and non-lethal (i.e. physiological saturating) Ca concentrations for native daphniids in field and lab-based experiments; compare the temporal trajectories of crustacean zooplankton in Dorset area lakes with different long-term patterns in pH and Ca; collaborate with Ministry scientists at Dorset to improve our understanding of the broader effects of Ca decline on lake ecosystems, beyond zooplankton; and take the lead on a major review paper summarizing our current understanding of the effects of Ca decline on aquatic biota, especially zooplankton.
Honours & Awards
Ontario Ministry of Environment and Energy, Environmental Research and Technology Staff Achievement Award 1992
the Patalas Award, which is presented to a North American limnologist whose research has been instrumental in underpinning rational lake management.1996
the Frank Rigler Memorial Award from the Society of Canadian Limnologists for excellence in limnological research.1998
the Government of Ontario Premier’s Research Excellence Award2003
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