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Fillinger, L. ; Hug, K. ; Griebler, C.

Selection imposed by local environmental conditions drives differences in microbial community composition across geographically distinct groundwater aquifers.

FEMS Microbiol. Ecol. 95:fiz160 (2019)
Publ. Version/Full Text Postprint Research data DOI PMC
Open Access Green
Several studies have analyzed biogeographic distribution patterns of microbial communities across broad spatial scales. However, it is often unclear to what extent differences in community composition across different regions are caused by dispersal limitation or selection, and if selection is caused by local environmental conditions alone or additional broad-scale region-specific factors. This is especially true for groundwater environments, which have been understudied in this context relative to other non-subsurface habitats. Here, we analyzed microbial community composition based on exact 16S rRNA amplicon sequence variants (ASVs) from four geographically separated aquifers located in different regions along a latitudinal transect of similar to 700 km across Germany. Using a combination of variation partitioning and ecological null models revealed that differences in microbial community composition were mainly the product of selection imposed by local environmental conditions and to a smaller but still significant extent dispersal limitation and drift across regions. Only similar to 23% of the total variation in microbial community composition remained unexplained, possibly due to underestimated effects of dispersal limitation among local communities within regions and temporal drift. No evidence was found for selection due to region-specific factors independent of local environmental conditions.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Biogeography ; Community Assembly ; Species Sorting ; Dispersal ; Metacommunity ; Amplicon Sequence Variants; Assembly Processes; Bacterial Communities; Beta-diversity; Biogeography; Framework; Patterns; Extrapolation; Biodiversity; Rarefaction; Mechanisms
ISSN (print) / ISBN 0168-6496
e-ISSN 1574-6941
Journal FEMS Microbiology Ecology
Quellenangaben Volume: 95, Issue: 11, Pages: , Article Number: fiz160 Supplement: ,
Publisher Wiley
Publishing Place Oxford
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Groundwater Ecology (IGOE)