2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/27/2021 | 2:00 PM - 3:30 PM | MACROINVERTEBRATE COMMUNITY COMPOSITION AND SECONDARY PRODUCTION IN STREAMS WITH A HISTORY OF ACIDIFICATION | Virtual Platform
MACROINVERTEBRATE COMMUNITY COMPOSITION AND SECONDARY PRODUCTION IN STREAMS WITH A HISTORY OF ACIDIFICATION
Acidification inhibits macroinvertebrate ion exchange causing decreased taxon fitness and survival. While it is understood that macroinvertebrate diversity declines with acidification, less is known about functional (e.g., secondary production) responses to acidification. Trait-based metrics (e.g., feeding group) approximate ecosystem function without direct measures. For example, changes in trait representation within macroinvertebrate communities predicts altered secondary production. While traits better correlate with function than taxonomically-based metrics, their predictive ability needs to be tested. We hypothesized that decreased trait richness will correspond to decreased production because of diminished resource use in acidified streams. From July 2019 - June 2020, five Hess samples were collected monthly from one acidified and one circumneutral stream in Shenandoah National Park. Trait richness and density were compared with measures of secondary production. Preliminary analyses suggest decreased richness and density of large bodied and semivoltine taxa could correspond to lower annual production in the more acidified stream. We will also present a comparison of trait structure and function to determine if changes in trait composition predict changes in macroinvertebrate secondary production.
- Anthropogenic
- Ecosystem functioning
- Energy flows
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Presenters/Authors
Kelly McIntyre
(), Virginia Tech, mcintyrek@vt.edu;
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Craig Snyder
(), U.S. Geological Survey's (USGS) , cdsnyder02@gmail.com ;
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Kelly Maloney
(), U.S. Geological Survey's (USGS) , kmaloney@usgs.gov;
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Sally Entrekin
(), Virginia Tech, sallye@vt.edu;
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