2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 8:30 AM - 10:30 AM | URBAN STRESSORS DRIVE FISH-BASED ECOLOGICAL NETWORKS IN STREAMS OF COLUMBUS, OHIO, USA | Virtual Platform
URBAN STRESSORS DRIVE FISH-BASED ECOLOGICAL NETWORKS IN STREAMS OF COLUMBUS, OHIO, USA
Integrating network perspectives into stream research can reveal stressor effects and estimate taxonomic and functional community characteristics, thus representing a novel approach to stressor and connectivity paradigms in urban catchments. Using six years of data from twelve streams of Columbus, Ohio, USA, the effects of nutrients (N:P), impervious surface (%IS), and sedimentation on fish community network properties were quantified. All stressors impacted some properties of network topology – linkage density (number of links per species), connectance (fraction of possible links in network), and compartmentalization (degree to which networks contain sub-webs), including synergistic interactive effects between sedimentation and stream size. We also found support for antagonistic effects between (1) sedimentation and %IS and between %IS and N:P on the magnitude of trophic interactions among species, and (2) %IS and stream size on the distribution of total magnitude of all trophic interactions per species. Our results point to the potential for urban stressors to decrease network complexity, compartmentalization, and stability, likely by altering upstream-downstream connectivity, homogenizing habitat, and limiting food resources. The observation that larger streams often buffered negative stressor effects suggests that restoration might be most beneficial in smaller headwater streams.
- Connectivity
- Urban streams
- Stressor
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Presenters/Authors
S. Mažeika Patricio Sulliván
(), The Ohio State University, sullivan.191@osu.edu;
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Jason R. Bohenek
(), The Ohio State University, bohenek.3@osu.edu;
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Carlos Cáceres
(), The Ohio State University, carlos.l.caceres@gmail.com;
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Laura W. Pomeroy
(), The Ohio State University, pomeroy.26@osu.edu;
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