2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | HIGH SPECIES REPLACEMENT AT SMALL SPATIAL SCALES: LOCAL CONDITIONS DRIVE TURNOVER IN INTERDUNAL WETLAND MACROINVERTEBRATE COMMUNITIES | Virtual Platform
HIGH SPECIES REPLACEMENT AT SMALL SPATIAL SCALES: LOCAL CONDITIONS DRIVE TURNOVER IN INTERDUNAL WETLAND MACROINVERTEBRATE COMMUNITIES
Environmental conditions and spatial processes structure communities, but the relative roles of these factors vary across the landscape, resulting in spatially variable biodiversity. Interdunal wetlands are nested within Lake Michigan’s coastal dune ecosystem and host abundant communities of aquatic macroinvertebrates. These wetlands contain previously undocumented aquatic macroinvertebrate diversity, are locally variable, and span a strong temperature and precipitation gradient across four degrees of latitude. To determine the relative roles of spatial processes and environmental conditions on alpha diversity patterns and community composition, we sampled 36 wetlands along the coastline and implemented abundance-based beta partitioning, multivariate, and species estimation analyses. Total estimated species richness was 115.69. Despite a short latitudinal gradient, we found a negative relationship between species richness and latitude (R2 = 0.11, P = 0.03). At local spatial scales, we found moderate to highly dissimilar communities structured by species replacement tracking local conditions (Mantel r = 0.329, P = < 0.01). This pattern was repeated along the coastline. Contrary to neutral theory, multiple-site Bray-Curtis dissimilarity did not increase with increasing spatial scale. Results suggest coastline connectivity and numerous protected areas are critical to maintain biodiversity in the dune ecosystem.
- Monitoring
- Connectivity
- Conservation
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Presenters/Authors
Nicole Stewart
(), Western Michigan University, nicole.a77.thompson@wmich.edu;
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Tiffany Schriever
(), Western Michigan University, tiffany.schriever@wmich.edu;
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