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5/22/2018 | 2:15 PM - 2:30 PM | EFFECTS OF CYANOBACTERIAL ALGAE BLOOMS ON SHORE FOOD WEBS OF LAKE ERIE AND THE MAUMEE RIVER | 320

EFFECTS OF CYANOBACTERIAL ALGAE BLOOMS ON SHORE FOOD WEBS OF LAKE ERIE AND THE MAUMEE RIVER

Decades of research have shown that aquatic resources can subsidize terrestrial consumers living near the shores of streams, oceans, and lakes. Typically subsidies take the form of emergent aquatic insects consumed by terrestrial predators, or algal “sea wrack,” consumed by detritivores. But what if the subsidy is composed of cyanobcteria, which can be toxic, and are often assumed to be of low nutritional quality, despite sparse and often conflicting information justifying this assumption. Here we describe the nutritional quality of “wrack” washed ashore the Maumee River and Lake Erie, along a gradient of cyanobacterial algal bloom severity. We find that C:N and C:P of wrack decline with increasing bloom severity, suggesting cyanobacteria potentially represent a high quality nutrient source for riparian consumers. However, we also explore the toxicity of the wrack and the potential combined effects on growth rate and survival of consumers. Additionally, we discuss potential effects on riparian wildlife. Cyanobacterial algal blooms are becoming an increasing occurrence globally. Although effects on drinking water and aquatic ecosystems are key, potential impacts on riparian wildlife should not be neglected.

Aquatic-terrestrial Linkage
Diet
Ecotoxicology

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Presenters/Authors

Kevin McCluney (), Bowling Green State University, kmcclun@bgsu.edu;