2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 9:30 AM - 9:45 AM | MICROBES RUN THROUGH IT: THE ROLE OF ALLOCHTHONOUS ORGANIC MATTER IN STRUCTURING STREAM AND RIVER MICROBIAL COMMUNITIES | 151 G
MICROBES RUN THROUGH IT: THE ROLE OF ALLOCHTHONOUS ORGANIC MATTER IN STRUCTURING STREAM AND RIVER MICROBIAL COMMUNITIES
Decomposition of organic matter (OM) is fundamental to nearly all ecosystems and is often mediated by microbes and consumers of the necrobiome. As headwaters receive phototrophically derived allochthonous OM from riparian zones, there is intense microbial and invertebrate processing affecting residual downstream transport. Some systems experience pulses of heterotrophically derived OM as phenological-based (e.g., salmon life cycle) or mass mortality subsidies (e.g., fish kills). Both subsidy types harbor exogenous microbes that are transported to receiving habitats; the fate of which is not well understood. Novel microbes bring intrinsic functions that are also not well documented. Here we used two systems to explore how microbes from allochthonous OM disperse and persist in recipient habitats and become processed or incorporated within consumers. Microbial communities from decomposing leaf litter and carrion were found in both epilithic biofilms and invertebrate consumers in Great Lakes region streams. We also identified different internal microbiomes of stream invertebrate scrapers, shredders and predators from two elevations of contrasting riparian cover along an Alpine river (NW Italy). These studies suggest allochthonous OM contributes new microbes to stream communities, but the function of such biotic subsidies remains unknown.
- Microbial
- Decomposition
- Aquatic-terrestrial Linkage
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Presenters/Authors
M. Eric Benbow
(), Michigan State University, benbow@msu.edu;
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Courtney Larson
(), Michigan State University, courtneyelarson126@gmail.com;
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Stefano Fenoglio
(), University of Piemonte Orientale (Italy), stefano.fenoglio@uniupo.it;
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Joseph Receveur
(), Michigan State University, receveur@msu.edu;
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