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research article

Fluvial network organization imprints on microbial co-occurrence networks

Widder, Stefanie
•
Besemer, Katharina
•
Singer, Gabriel A.
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2014
Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS)

Recent studies highlight linkages among the architecture of ecological networks, their persistence facing environmental disturbance, and the related patterns of biodiversity. A hitherto unresolved question is whether the structure of the landscape inhabited by organisms leaves an imprint on their ecological networks. We analyzed, based on pyrosequencing profiling of the biofilm communities in 114 streams, how features inherent to fluvial networks affect the co-occurrence networks that the microorganisms form in these biofilms. Our findings suggest that hydrology and metacommunity dynamics, both changing predictably across fluvial networks, affect the fragmentation of the microbial co-occurrence networks throughout the fluvial network. The loss of taxa from co-occurrence networks demonstrates that the removal of gatekeepers disproportionately contributed to network fragmentation, which has potential implications for the functions biofilms fulfill in stream ecosystems. Our findings are critical because of increased anthropogenic pressures deteriorating stream ecosystem integrity and biodiversity.

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Type
research article
DOI
10.1073/pnas.1411723111
Web of Science ID

WOS:000341230800065

Author(s)
Widder, Stefanie
•
Besemer, Katharina
•
Singer, Gabriel A.
•
Ceola, Serena  
•
Bertuzzo, Enrico  
•
Quince, Christopher
•
Sloan, William T.
•
Rinaldo, Andrea  
•
Battin, Tom J.  
Date Issued

2014

Publisher

National Academy of Sciences

Published in
Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS)
Volume

111

Issue

35

Start page

12799

End page

12804

Subjects

stream networks

•

hydrological regime

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
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Available on Infoscience
October 23, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/108019
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