2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | THE EFFECTS OF ECOLOGICAL STOICHIOMETRIC CONSTRAINTS AND HYDROLOGIC REGIME ON THE FUNCTIONAL TRAIT DIVERSITY OF AQUATIC INSECT COMMUNITIES | Virtual Platform
THE EFFECTS OF ECOLOGICAL STOICHIOMETRIC CONSTRAINTS AND HYDROLOGIC REGIME ON THE FUNCTIONAL TRAIT DIVERSITY OF AQUATIC INSECT COMMUNITIES
Natural and anthropogenic disturbances are causing declines in biodiversity, greater intermittency of formerly perennial streams, and increased frequency and intensity of flood and drought events. Associated variation in basal resource stoichiometry and flow regime alter P availability, which alters competitive dynamics and drives functional trait diversity of aquatic communities. To examine the response of aquatic insect communities to varying elemental and hydrological environments, we investigated the relationship between functional diversity of benthic macroinvertebrate communities, basal resource stoichiometry, and flow regime using data from 17 lotic NEON sites. Shannon diversity and functional richness negatively correlated with algal C:P. Shannon diversity and functional dispersion negatively correlated with hydrograph skewness. The functional trait composition of sites with the lowest functional dispersion, all found in the interior of the U.S., showed that dominant traits were small body size, fast seasonal development, and univoltinism. These results indicate basal resource stoichiometry and flow regime similarly constrain insect life histories while differentially impacting functional trait diversity. Climate change and human impact will exacerbate these constraints which, as indicated by our results, will further reduce functional and taxonomic diversity of aquatic communities.
- Dry rivers
- Stream
- Anthropogenic
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Presenters/Authors
Annie Blalock
(), Middlebury College, ablalock@middlebury.edu;
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Jessica Corman
(), University of Nebraska-Lincoln, jcorman3@unl.edu;
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Steven Thomas
(), School of Natural Resources, University of Nebraska-Lincoln, Lincoln, sthomas5@unl.edu;
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Eric Moody
(), Middlebury College, ekmoody@middlebury.edu;
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