2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2018 | 9:30 AM - 9:45 AM | SHORT AND LONG-TERM IMPACTS OF SALMON CARCASS DECOMPOSITION ON STREAM MICROBIAL COMMUNITY STRUCTRE: ALLOCHTHONOUS MICROBIAL SUBSIDIES TO DOWNSTREAM FOOD WEBS. | 321
SHORT AND LONG-TERM IMPACTS OF SALMON CARCASS DECOMPOSITION ON STREAM MICROBIAL COMMUNITY STRUCTRE: ALLOCHTHONOUS MICROBIAL SUBSIDIES TO DOWNSTREAM FOOD WEBS.
Salmon decomposition is traditionally viewed through the lens of energy and nutrient subsidies, but not from the perspective of also acting as “microbial subsidies.” Salmon have microbial communities residing on and within them that are directly introduced into streams, by microbes sloughing off and integrating into biofilms, or indirectly, by invertebrates facilitating dispersal. The objective of this study was to track the effects of salmon decomposition on stream microbial communities over time. Microbial communities (epilithic biofilms and macroinvertebrate internal) were sampled at both treatment (downstream reach) and reference sites (upstream reach) before (September), during (October), and after (November to August) salmon carrion introduction. The study was repeated to assess inter-annual variation (September 2014-August 2016). A significant influence of treatment and time on biofilm communities (PERMANOVA, p<0.01) was detected. These results were predominately influenced by Cyanobacteria dynamics, which had a significant reduction (relative abundance) in the treatment reach two weeks after carcass introduction. The internal microbiomes of Baetis brunneicolor (collector-gatherer) and Stegopterna mutata (collector-filterer) were not significantly different between reaches over time (PERMANOVA, p>0.05). These foundational data highlight the importance of carrion’s role in the microbial ecology of lotic systems.
- Microbial
- Biofilm
- Decomposition
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Presenters/Authors
Courtney Larson
(), Michigan State University, courtneyelarson126@gmail.com;
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Courtney Weatherbee
(), Michigan State University, weath108@msu.edu;
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Jennifer L. Pechal
(), Michigan State University, pechalje@msu.edu;
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Brandon Gerig
(), Northern Michigan University, bgerig@nmu.edu;
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Dominic Chaloner
(), University of Notre Dame, dchaloner@nd.edu;
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Gary Lamberti
(), University of Notre Dame, glambert@nd.edu;
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M. Eric Benbow
(), Michigan State University, benbow@msu.edu;
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