2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/20/2019 | 11:00 AM - 11:15 AM | THE RIVER CONTINUUM CONCEPT PREDICTS FISH PREY ASSEMBLAGE STRUCTURE FOR AN INSECTIVOROUS FISH ALONG A TEMPERATE RIVERSCAPE | 151 G
THE RIVER CONTINUUM CONCEPT PREDICTS FISH PREY ASSEMBLAGE STRUCTURE FOR AN INSECTIVOROUS FISH ALONG A TEMPERATE RIVERSCAPE
The river continuum concept (RCC) provides a framework for processes structuring lotic ecosystems by synthesizing sources and transport of C in streams. The RCC has received considerable attention since its inception >35 y ago, but few investigators have tested its predictions by explicitly linking consumer groups. We assessed insect assemblage structure in the diet of a broadly distributed insectivorous fish (Cottus carolinae) in Tennessee to test 3 predictions from the RCC: 1) longitudinal change in relative biomass of insect functional feeding groups (FFGs); 2) maximum taxonomic diversity at stream orders 3 to 5; and 3) temporal turnover in taxonomic composition across 1 y. We found that relative biomass of insect FFGs consumed by C. carolinae broadly matched predictions from the RCC. Maximum taxonomic diversity assessed at the family rank occurred at stream order 4, and monthly prey assemblages followed a sequence of turnover and a return to starting conditions across 1 y. Our approach illustrates proof of concept that RCC tenets are integrated into the diet of at least 1 higher-level consumer and transcend assemblage boundaries in regulating the longitudinal and vertical flow of C in streams.
- Diet
- Fish
- Landscape
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Presenters/Authors
William Curtis
(), Tennessee Tech University, mrlliw1@gmail.com;
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Amy Gebhard
(), South Dakota Game, Fish, and Parks, amy.e.doll1@gmail.com;
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Joshuah Perkin
(), Texas A & M University , jperkin@tamu.edu;
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