2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2018 | 2:00 PM - 2:15 PM | AQUATIC INVERTEBRATE COMMUNITIES VARY BETWEEN STREAMBED HABITATS WITH VARIABLE CONNECTION TO THE HYPORHEIC ZONE IN AN OZARK GRAVEL-BED STREAM | 420 A
AQUATIC INVERTEBRATE COMMUNITIES VARY BETWEEN STREAMBED HABITATS WITH VARIABLE CONNECTION TO THE HYPORHEIC ZONE IN AN OZARK GRAVEL-BED STREAM
The hyporheic zone provides unique habitat for aquatic invertebrates and influences diversity and productivity in streams. The Ozark Highlands ecoregion is dominated by karst topography, containing streams with bedrock-lined reaches alternating with deep, gravel-bedded reaches. Comparing benthic invertebrate communities between bedrock- and gravel-lined reaches can help address a question of hyporheic zone impact on diversity and productivity. We are sampling invertebrates in an Ozark reference stream regularly for a calendar year from three habitats: bedrock benthic, gravel-bed benthic, and hyporheic (~30-45cm below the streambed), to determine if assemblages vary in density, taxonomic richness, composition and (ultimately) secondary production. Preliminary results suggest benthic densities are similar but taxonomic richness is higher in the gravel-lined reach than in the bedrock-lined reach and community composition is different. Furthermore, we have documented taxa in the hyporheic zone not detected in any of the streambed samples. The hyporheic zone is likely important for invertebrate development and production and might provide essential refugia from drought and flood. With the hyporheic zone threatened in many streams by sediment deposition, it is essential we understand the possible impacts to invertebrate communities.
- Hyporheic
- Community
- Connectivity
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Presenters/Authors
Nathan Dorff
(), Missouri State University, natedorff@gmail.com;
ASHA DISCLOSURE:
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Debra Finn
(), Missouri State University, dfinn@missouristate.edu;
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