NDLI: Substantial Variability of Multiple Microbial Communities Collected at Similar Acidic Mine Water Outlets

Content Provider	Springer Nature Link
Author	Falteisek, Lukáš Duchoslav, Vojtěch Čepička, Ivan
Copyright Year	2016
Abstract	Deep sequencing of prokaryotic 16S rDNA regularly reveals thousands of microbial species thriving in many common habitats. It is still unknown how this huge microbial diversity, including many potentially competing organisms, may persist at a single site. One of plausible hypotheses is that a large number of spatially separated microcommunities exist within each complex habitat. Smaller subset of the species may exist in each microcommunity and actually interact with each other. We sampled two groups of microbial stalactites growing at a single acidic mine drainage outlet as a model of multiplicated, low-complexity microhabitat. Samples from six other sites were added for comparison. Both tRFLP and 16S rDNA pyrosequencing showed that microbial communities containing 6 to 51 species-level operational taxonomic units (OTU) inhabited all stalactites. Interestingly, most OTUs including the highly abundant ones unpredictably alternated regardless of physical and environmental distance of the stalactites. As a result, the communities clustered independently on sample site and other variables when using both phylogenetic dissimilarity and OTU abundance metrics. Interestingly, artificial communities generated by pooling the biota of several adjacent stalactites together clustered by the locality more strongly than when the stalactites were analyzed separately. The most probable interpretation is that each stalactite contains likely random selection from the pool of plausible species. Such degree of stochasticity in assembly of extremophilic microbial communities is significantly greater than commonly proposed and requires caution when interpreting microbial diversity.
Starting Page	163
Ending Page	174
Page Count	12
File Format	PDF
ISSN	00953628
Journal	Microbial Ecology
Volume Number	72
Issue Number	1
e-ISSN	1432184X
Language	English
Publisher	Springer US
Publisher Date	2016-04-08
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Acidophiles Chemolithotrophy Phylogenetic dissimilarity Community assembly Neutral processes Microbiology Ecology Microbial Ecology Geoecology/Natural Processes Nature Conservation Water Quality/Water Pollution
Content Type	Text
Resource Type	Article
Subject	Soil Science Ecology Ecology, Evolution, Behavior and Systematics

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