Microbial subnetworks related to short-term diel O2fluxes within geochemically distinct freshwater wetlands
| Autor: | Deric R. Learman, Donald G. Uzarski, Peter Stefanov Kourtev, Matthew J. Cooper, Anthony J. Wing, Dean J. Horton |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Biogeochemical cycle Denitrification Fresh Water Wetland Photosynthesis Microbiology 03 medical and health sciences Genetics Ecosystem Molecular Biology Diel vertical migration Phylogeny Soil Microbiology geography geography.geographical_feature_category Bacteria Ecology Microbiota Community structure Archaea Oxygen 030104 developmental biology Microbial population biology Wetlands Environmental science |
| DOI: | 10.1101/363226 |
| Popis: | O2concentrations often fluctuate over diel timescales within wetlands, driven by temperature, sunlight, photosynthesis, and respiration. These daily fluxes have been shown to impact biogeochemical transformations (e.g. denitrification), which are mediated by the residing microbial community. However, little is known about how resident microbial communities respond to diel dramatic physical and chemical fluxes in freshwater wetland ecosystems. In this study, total microbial (bacterial and archaeal) community structure was significantly related to diel time points in just one out of four distinct freshwater wetlands sampled. This suggests that daily environmental shifts may influence wetlands differentially based upon the resident microbial community and specific physical and chemical conditions of a freshwater wetland. However, when exploring at finer resolutions of the microbial communities within each wetland, subcommunities within two wetlands were found to correspond to fluctuating O2levels. Microbial taxa that were found to be susceptible to fluctuating O2levels within these subnetworks may have intimate ties to metabolism and/or diel redox cycles. This study highlights that freshwater wetland microbial communities are often stable in community structure when confronted with short-term O2fluxes, however, specialist taxa may be sensitive to these same fluxes. |
| Databáze: | OpenAIRE |
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