Abstract
Climate change interacts with other environmental stressors (e.g., acid deposition, calcium depletion, invasive species) to alter both the chemical and biological characteristics of Boreal Shield lakes, potentially leading to changes in aquatic biodiversity. Changes in biodiversity can result in loss of sensitive species and affect dynamic interactions among species at varying trophic levels. Currently, little is known about the effect of climate warming on predator-prey relationships in aquatic ecosystems. I examine how predicted warming of Boreal Shield lakes may affect predation rate. More specifically, my research examines how temperature affects the predation rate on zooplankton by common macroinvertebrate predators. Zooplankton, Chaoborus and Notonectidae were used from Swan Lake in Sudbury, ON. I performed 24-hr laboratory feeding trials to examine the rate at which predators feed over a range of natural and predicted lake temperatures. By investigating differences in invertebrate predation occurring in Swan Lake, we will be able to predict predator -prey relationships in Boreal Shield lakes subject to warming as a result of climate change.
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