2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 2:00 PM - 3:30 PM | Positive biotic interactions mediate metapopulation-level association in stream fishes | Virtual Platform
Positive biotic interactions mediate metapopulation-level association in stream fishes
Understanding factors affecting species distribution is a key topic in freshwater ecology. While most studies of freshwater fishes have focused on the effects of environmental drivers and negative interactions on species distribution, positive interactions (e.g., mutualism) are now recognized as an important determinant of species distribution. However, much less is known about the role of positive interactions in driving large-scale distribution patterns, such as metapopulation occupancy. Here, we focus on reproductive mutualisms between nest-building (host) and nest associates (beneficiary species) to quantify the effect of positive biotic interactions on metapopulations of stream fishes in the Midwest USA. We used a regional fish database and developed a conceptual hypothetical pathway depicting interrelationships between abiotic variables and biotic interactions to quantify watershed-scale occupancies of study species and their associations with environments. Piecewise structural equation modeling highlighted that host species greatly increased the metapopulation occupancy of nest associates, while influences of abiotic predictors on the occurrence varied by species. Our results provide quantitative evidence that positive interactions drive large-scale distributions of stream fishes that may provide valuable insights into conservation and management actions.
- Biodiversity
- Mutualism
- Stream
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Presenters/Authors
Seoghyun Kim
(), Department of Biology, University of North Carolina at Greensboro, s_kim53@uncg.edu;
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Christy Dolph
(), Department of Ecology, Evolution and Behavior, University of Minnesota, dolph008@umn.edu;
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Akira Terui
(), Department of Biology, University of North Carolina at Greensboro, hanabi0111@gmail.com;
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