Effects of environmental conditions on Hesperodiaptomus arcticus phenology in alpine lakes of the Canadian Rocky Mountains
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The biota of alpine lakes are highly sensitive to climate-driven changes in environmental conditions. This study explored the phenological response of calanoid copepod, Hesperidiaptomus arcticus to environmental drivers in four lakes in a longitudinal dataset, and examined patterns of synchrony in environmental drivers and in phenology. By enumerating the proportion of individuals at each juvenile stage, an aggregated measure of mean stage was used to represent the phenology population in each lake for any given year. I found that lake surface temperature and ice off drove phenology in different systems depending on individual lake characteristics, and that both temperature and H. arcticus phenology were fairly synchronous. A regular alternating pattern of all early and all advanced mean stages for Lake Opabin also reveals the possibility of a two-year life cycle. Predictions for warming climate indicate that the phenology of H. arcticus will advance, altering community dynamics as competitors simultaneously respond. Though shifts in competitive interactions have been observed in many ecosystem types, the sensitivity and relative simplicity of these alpine lakes more clearly illustrates these implications for climate warming.
Franklin and Marshall College Archives, Undergraduate Honors Thesis 2017
- F&M Theses Collection