2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 9:15 AM - 9:30 AM | LONG-TERM ZOOPLANKTON COMMUNITY PATTERNS IN LAKE CHAMPLAIN, USA: THE ROLE OF INVASIVE SPECIES IN RE-STRUCTURING LAKE FOOD WEBS. | 410 A
LONG-TERM ZOOPLANKTON COMMUNITY PATTERNS IN LAKE CHAMPLAIN, USA: THE ROLE OF INVASIVE SPECIES IN RE-STRUCTURING LAKE FOOD WEBS.
Freshwater lakes provide ideal habitat for invasive species that may deteriorate ecological integrity by altering food web dynamics. Lake Champlain Long-term
patterns from 1992-present illustrate the impact of invasive species on the pelagic food web. Zooplankton exhibited major shifts including a decline in rotifer abundance in the mid-1990s, following invasion of zebra mussels. More recent community shifts represent invasion of Alewife (Alosa pseudoharengus) and Spiny Waterflea (Bythotrephes longimanus). The primary driver of change in Lake Champlain’s plankton over the past two decades appears to be species invasions rather than patterns in water quality or trophic status. Food web analysis suggests zebra mussel direct impacts on Rotifers, via predation, with potential indirect effects on Cladocera, Copepods, and Mysids. Impacts of Alewife and Spiny waterflea invasion in the mid-2000s and 2014, respectively, occurred on selected larger bodied Cladocera and Copepod taxa. Post- invasion patterns in Lake Champlain’s pelagic plankton communities illustrate the threat that invasive species pose to the integrity of freshwater ecosystems.
- Invasive
- Monitoring
- Biodiversity
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Presenters/Authors
Timothy Mihuc
(), SUNY Plattsburgh, mihuctb@plattsburgh.edu;
ASHA DISCLOSURE:
Financial -
Nonfinancial -