2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/07/2017 | 9:30 AM - 9:45 AM | Persistence and Stability of Ozark Highland Fish Assemblages in Relation to Landscape and Local Variables | 302C
Persistence and Stability of Ozark Highland Fish Assemblages in Relation to Landscape and Local Variables
Studies examining relationships between land use and fish assemblage persistence and stability are rare but necessary to understand associations at multiple temporal and spatial scales. We examined persistence and stability over 32–43 years in four streams in the Ozark Highlands by repeating previous surveys. Smaller catchments (<120 km2) exhibited the lowest and most variable persistence and stability, suggesting smaller catchments were more vulnerable across time. Within smaller catchments, persistence was significantly correlated to both forest and pasture; in contrast, persistence in larger catchments was not significantly correlated to land use. Stability was significantly correlated to pasture land use in small catchments. Seven species showed significant range expansions across all four systems, and one species, Micropterus dolomieu, exhibited a range reduction (from 20 to four sites). At sites where M. dolomieu was missing, we observed colonization of M. punctulatus and M. salmoides. An apparent downstream shift of headwaters species was detected in two systems and suggests a change in upstream hydrology. In-stream habitat reflected changes in land use and may provide proximate factors that explain the correlation between assemblage shifts and land use.
- C02 Fish and Other Aquatic Vertebrates
- C17 Bioassessment
- C11 Community Ecology
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Presenters/Authors
Ginny Adams
(), University of Central Arkansas, gadams@uca.edu;
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Reid Adams
(), University of Central Arkansas, radams@uca.edu;
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Heather Saco
(), Arkansas Department of Environmental Quality, hla916@gmail.com;
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Chelsey Sherwood
(), University of Central Arkansas, csherwood1@cub.uca.edu;
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