2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | AN ONGOING STUDY INTO MACROINVERTEBRATE COMMUNITY RECOLONIZATION IN AN INTERMITTENT OZARK STREAM | Virtual Platform
AN ONGOING STUDY INTO MACROINVERTEBRATE COMMUNITY RECOLONIZATION IN AN INTERMITTENT OZARK STREAM
Intermittent streams make up the majority of the total stream length in the USA, but they are understudied, especially in temperate regions like the Ozark Highlands, where they are common and typically have diverse macroinvertebrate communities. We are examining macroinvertebrate recolonization patterns following the dry season in an intermittent Ozark stream that typically loses surface flow 4-5 months annually. Recolonization sources include perennial seeps, small in-channel pools maintained through drought, streambed sediments, and nearby perennial streams. Starting October 2020 (end of dry season), we have collected macroinvertebrates monthly in four longitudinally distributed reaches spanning approximately 700m between a small upstream seep and the confluence with a perennial, 2nd-order stream. Early results show that diverse EPT taxa colonized quickly following flow resumption in November. Recolonist communities were substantially different from perennial mainstem communities, a result that suggests most taxa recolonize the benthos from local, in-channel sources, including several Trichoptera from the upstream seep and Plecoptera and Ephemeroptera from streambed sediments. Our study is the first to thoroughly examine benthic community recolonization in the Ozarks ecoregion and will provide data crucial to conservation and management of common but underappreciated intermittent streams.
- Non-perennial rivers
- Connectivity
- Biodiversity
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Presenters/Authors
Henry Priest
(), Missouri State University , Priest1016@live.MissouriState.edu;
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Hannah Robinson
(), Missouri State University , Bartron19@live.missouristate.edu;
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Debra Finn
(), Missouri State University, dfinn@missouristate.edu;
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