2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | BLUE WATERS, GREEN BOTTOMS: DIRECT AND INTERACTIVE CONTROLS ON THE EMERGENCE OF FILAMENTSOUS ALGAL BLOOMS (FABS) IN CLEAR LAKES | Virtual Platform
BLUE WATERS, GREEN BOTTOMS: DIRECT AND INTERACTIVE CONTROLS ON THE EMERGENCE OF FILAMENTSOUS ALGAL BLOOMS (FABS) IN CLEAR LAKES
Littoral zones of clear lakes with excellent water quality are experiencing prolonged greening events. Throughout the world, nearshore, well-lit habitats are increasingly carpeted by luxuriant growths of attached filamentous algae. Are littoral filamentous algal blooms (FABs) an early indicator of eutrophication in lakes that are newly exposed to anthropogenic nutrient loading? Or are FABs an emerging threat to clear lakes generated by the combined effects of groundwater pollution, weakened top-down control, and climate-induced changes in hydrodynamics? We review conceptual models developed at a 2019 international workshop on FABs. FABs require high light intensities and proliferate in clear lakes where nutrient concentrations in ground water is high relative to the overlying water. Filamentous chlorophytes may have high nitrogen demand, and overtake other benthic taxa when N:P is high and grazing is weak. As climate changes, longer growing seasons and stronger stratification may keep water columns clear. Climate-driven changes in terrestrial landscapes may be accelerating groundwater nutrient loading, facilitating the development of FABs. Current limnological models and monitoring practices leave us ill-equipped to advise the public on management and prevention of this emerging threat to clear lakes.
- Ecotones
- Anthropogenic
- Ecosystem functioning
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Presenters/Authors
Yvonne Vadeboncoeur
(), Wright State University, yvonne.vadeboncoeur@wright.edu;
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Simon Stewart
(), Cawthron Institute, simon.stewart@cawthron.org.nz;
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Marianne Moore
(), Wellesley College, mmoore@wellesley.edu;
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Sudeep Chandra
(), Global Water Center and Biology Department, University of Nevada, Reno, sudeep@unr.edu;
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