2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 2:00 PM - 2:15 PM | TAXONOMIC AND FUNCTIONAL TRAIT STRUCTURE WITHIN THE SIZE SPECTRUM: COMMON BUILDING BLOCKS OR IDIOSYNCRASY? | 251 DE
TAXONOMIC AND FUNCTIONAL TRAIT STRUCTURE WITHIN THE SIZE SPECTRUM: COMMON BUILDING BLOCKS OR IDIOSYNCRASY?
Size-structure within aquatic communities can often be characterized by a simple scaling relationship between average body mass and abundance within log-2 size classes. This ‘size spectrum’ has been documented in a variety of ecosystems and as the empirical database grows, critical comparisons are being used to characterize central tendencies and anomalies in model parameters (regression model slopes and intercepts). The present study takes an additional step by examining taxonomic and functional trait structure within the discrete size classes that are used in traditional size spectra models. Basic model parameters will first be compared among size spectra from an array of eastern and western U.S. streams. Total biomass within each size class will then be partitioned into taxonomic and functional feeding group components (e.g. summed biomass of mayflies or predators within each size class). By comparing size-specific taxonomic and functional feeding group components among streams, I will test the hypothesis that the size spectrum is an emergent construct of common taxonomic and/or functional building blocks in temperate forested streams.
- Fish
- Invertebrate
- Modeling
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Presenters/Authors
Daniel McGarvey
(), Center for Environmental Studies, Virginia Commonwealth University, djmcgarvey@vcu.edu;
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Nonfinancial -