2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/27/2021 | 2:00 PM - 3:30 PM | Investigating energetic scaling predictions for stream invertebrate communities | Virtual Platform
Investigating energetic scaling predictions for stream invertebrate communities
Considerable effort has been dedicated to understanding whether and how individual metabolism scales to influence energy use and production of populations within communities. The energy-equivalence rule posits that population-level energy use is independent of body size – and equivalent among populations – because of opposing body size-metabolism and body size-abundance relationships. Support for this hypothesis is mixed, and many previous studies suffer from comparing populations across disparate communities or estimating metabolic rate using general statistical models. We compiled thousands of direct estimates of annual population-level invertebrate production, a proxy for energy use, across stream communities that span a range of environmental conditions. As expected, we found that abundance (number/m2) was negatively correlated with body size, but slopes were shallower than predicted (-0.44-0.69 vs. -0.75). We also found that individual production scaled positively with body size, but the slope was steeper than predicted (0.84 vs. 0.75). Finally, relationships between body size and population-level production within communities were variable and trended positive, but slopes generally did not differ from zero. Our preliminary results suggest that the energy equivalence rule cannot be rejected for stream invertebrate communities, although alternative hypotheses merit further examination.
- Ecosystem functioning
- Food webs
- Ecological dynamics
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Presenters/Authors
Wyatt Cross
(), Montana State University, wyatt.cross@montana.edu ;
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Kurt Anderson
(), University of California, Riverside, kurt.anderson@ucr.edu;
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Arthur Benke
(), University of Alabama, abenke@ua.edu;
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Thomas Brey
(), Alfred Wegener Institute, thomas.brey@awi.de;
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Erin R. Hotchkiss
(), Virginia Tech, ehotchkiss@vt.edu;
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Alexander D. Huryn
(), The University of Alabama, huryn@ua.edu;
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Jeremy Jones
(), University of Alaska Fairbanks, jbjonesjr@alaska.edu;
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Lillian McGill
(), University of Washington , lmcgill@uw.edu;
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Christopher Patrick
(), Virginia Institute of Marine Science (VIMS), cpatrick@vims.edu;
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Parsa Saffarinia
(), University of California, Riverside, psaff001@ucr.edu;
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Eric Scholl
(), Montana State University, escholl86@gmail.com ;
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Matthew Troia
(), University of Texas San Antonio, troiamj@gmail.com;
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J. Bruce Wallace
(), Dept. Entomology and Odum School of Ecology, University of Georgia, bwallace@uga.edu;
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Matt Whiles
(), University of Florida, mwhiles@ufl.edu;
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