2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 9:30 AM - 9:45 AM | EPHEMERAL WETLAND INVERTEBRATES IN A NATURALLY DISAPPEARING HABITAT: EMERGENT PATTERNS OF COMMUNITY DISASSEMBLY | 151 DEF
EPHEMERAL WETLAND INVERTEBRATES IN A NATURALLY DISAPPEARING HABITAT: EMERGENT PATTERNS OF COMMUNITY DISASSEMBLY
Communities inhabiting ephemeral wetlands naturally undergo community disassembly every hydroperiod. Disassembly proceeds through processes including but not limited to emigration, inactivation (diapause, resting eggs, torpor, etc.), or simply killing individuals in the harshening conditions of the disappearing habitat. Emerging from these processes are patterns that can be tracked by following the community structure of ephemeral wetlands through their hydroperiod. We tested the following hypotheses in aquatic invertebrate communities in a group of ephemeral wetlands (Playa Lakes) through their entire hydroperiods in the Pawnee National Grassland in Colorado, USA. As the ephemeral wetlands dried, we expected: 1–Diversity to decrease, 2-Predation to increase, 3-Encounter rates to increase, 4-Immigration of new species to decrease. We found that diversity in the invertebrate community increased in the beginning of the hydroperiod, but decreased towards the end; predation rates increased; encounter rates to be highest in the middle of the hydroperiod; and less immigration to occur as the hydroperiod proceeded. Determining how an ephemeral wetland disassembles is extremely important for understanding the ecology of ephemeral ecosystems. Additionally, monitoring the health of these systems is impossible without knowing when in the hydroperiod sampling is occurring.
- Temporal
- Invertebrate
- Amphibian
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Presenters/Authors
Brian O'Neill
(), University of Wisconsin-Whitewater, oneillb@uww.edu;
ASHA DISCLOSURE:
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Nonfinancial -
James H. Thorp
(), University of Kansas/Kansas Biological Survey, thorp@ku.edu;
ASHA DISCLOSURE:
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Nonfinancial -