2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/08/2017 | 11:00 AM - 11:15 AM | GAUGING THE IMPORTANCE OF MICROHABITAT IN QUALITATIVE MACROINVERTEBRATE SAMPLING THROUGH THE ANALYSIS OF FIVE COMMONLY SAMPLED MICROHABITAT TYPES IN AN EFFLUENT-IMPACTED RIVER | 306C
GAUGING THE IMPORTANCE OF MICROHABITAT IN QUALITATIVE MACROINVERTEBRATE SAMPLING THROUGH THE ANALYSIS OF FIVE COMMONLY SAMPLED MICROHABITAT TYPES IN AN EFFLUENT-IMPACTED RIVER
We have used different sampling strategies to relate macroinvertebrate assemblages with habitat quality in the Sangamon River, above and below the sanitary district effluent discharge in Decatur, IL. The standard 20 jab method of proportional sampling in multiple microhabitats, based on QHEI physical habitat score, sampled allowed for comparison between sites based on overall community composition. However, it oversampled fine sediments, which dominate the Sangamon, therefore potentially missing sensitive taxa in isolated quality habitats. In the fall of 2016 we tested an enhanced qualitative approach to better gauge the importance of microhabitat types to macroinvertebrate assemblages in the river. We sampled five different natural microhabitats (riffles, fine sediments, root wads, snags, leaf packs) and 2 artificial substrates (hester dendy, artificial leaf packs) at seven different sites. Sampling a subset of specific microhabitats should allow for comparisons between sites, capture of sensitive taxa, and identification of specific habitats important in reclamation efforts. Preliminary results indicate that root wad microhabitats would fall into this category. However, samples are currently being processed.
- C11 Community Ecology
- C08 Urban Ecology
- C03 Invertebrates
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Presenters/Authors
Samuel Gradle
(), Eastern Illinois University, samgradle@gmail.com;
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Robert Colombo
(), Eastern Illinois University, recolombo@eiu.edu;
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Charles Pederson
(), Eastern Illinois University , clpederson@eiu.edu;
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Jeffrey Laursen
(), Eastern Illinois University , jrlaursen@eiu.edu;
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