2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 2:00 PM - 3:30 PM | INVASIVE DREISSENID MUSSELS HARBOR BENTHIC ALGAL ASSEMBLAGES DINSTINCT FROM SURROUNDING SEDIMENTS IN LAKE ONTARIO AND LAKE ERIE | Virtual Platform
INVASIVE DREISSENID MUSSELS HARBOR BENTHIC ALGAL ASSEMBLAGES DINSTINCT FROM SURROUNDING SEDIMENTS IN LAKE ONTARIO AND LAKE ERIE
Assessments of benthic algae in large lakes are rare owing to difficulties in sampling an extensive, structurally heterogeneous habitat. The shells of invasive dreissenid mussels may provide novel hard surfaces in an expanse of otherwise soft sediments in the Great Lakes benthos. We measured the composition, biomass, and photosynthesis of algae growing on sediments and attached to dreissenid mussels across broad depth gradients during the Cooperative Science and Monitoring Initiative surveys in September 2018 (Lake Ontario; 46 sites) and July 2019 (Lake Erie; 43 sites). Sediment chlorophyll was greatest in shallow littoral waters and decreased with depth. We detected benthic photosynthesis from 10 – 40 m in both lakes. Sediments contained abundant mobile benthic diatoms but there were also many settled planktonic diatoms. Biofilms on Dreissena were composed of similar diatoms as sediments, but rarely contained planktonic taxa. Cyanobacteria (Pseudoanabaena, Phormidium) and green algae (Pediastrum) were more common on Dreissena than on sediments. The colonization of soft sediments by Dreissena is providing opportunities for filamentous algae to persist in previously unsuitable habitats throughout the Great Lakes, which could have profound ramifications for nutrient and energy flow in the littoral zone.
- Species interactions
- Ecosystem
- Ecosystem functioning
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Presenters/Authors
Leon Katona
(), Wright State University , katona.2@wright.edu;
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Lyubov E. Burlakova
(), Great Lakes Center at SUNY Buffalo State, burlakle@buffalostate.edu;
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Alexander Y. Karatayev
(), Great Lakes Center at SUNY Buffalo State, karataay@buffalostate.edu;
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Yvonne Vadeboncoeur
(), Wright State University, yvonne.vadeboncoeur@wright.edu;
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