EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/27/2021 | 2:00 PM - 3:30 PM | DO SUMMER MORTALITY EVENTS OF ZEBRA MUSSELS CAUSE NUTRIENT PULSES IN LAKE CANYON? | Virtual Platform
DO SUMMER MORTALITY EVENTS OF ZEBRA MUSSELS CAUSE NUTRIENT PULSES IN LAKE CANYON?
Large mortality events can cause nutrient pulses that affect nutrient cycling withing a system and ecosystem functioning. Invasive zebra mussels (Dreissena polymorpha) in Canyon Lake, Texas occur at the southern edge of their North American distribution and hot temperatures during summer can lead to high mortality. The goal of this study was to examine nutrient release of decaying mussel tissue in the laboratory and to combine this with field observations of zebra mussel density and mortality to estimate the amount of nutrients released during summer mortality events. Zebra mussels were decayed at 30°C to determine mass loss and nutrient release rates. Dive surveys along several transects were used to estimate population size of zebra mussels at different depths throughout the lake. Cages with smaller and larger zebra mussels were placed at three marinas and monitored bimonthly to determine mortality rates. Preliminary findings showed that about 60% of the mussel tissue was decayed within the first 2 days and decay constants did not differ between smaller (10-15mm) and larger (15-25mm) mussels.
- Decomposition
- Nutrient cycling
- Biological effects
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Presenters/Authors
David Swearingen
(), Texas State University, d_s279@txstate.edu;
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Emily Lorkovic
(), Texas State University, e_l328@txstate.edu;
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Weston Nowlin
(), Texas State University, wnowlin@txstate.edu;
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Astrid Schwalb
(), Texas State University, schwalb@txstate.edu;
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