Document Detail


Bacterial community structure and dissolved organic matter in repeatedly flooded subsurface karst water pools.
MedLine Citation:
PMID:  24716603     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Bacterial diversity, community assembly, and the composition of the dissolved organic matter (DOM) were studied in three temporary subsurface karst pools with different flooding regimes. We tested the hypothesis that microorganisms introduced to the pools during floods faced environmental filtering towards a 'typical' karst water community, and we investigated if DOM composition was related to floodings and the residence time of water in stagnant pools. As predicted, longer water residence consistently led to a decline of bacterial diversity. The microbial assemblages in the influx water harbored more 'exotic' lineages with large distances to known genotypes, yet these initial communities already appeared to be shaped by selective processes. Betaproteobacterial operational taxonomic units (OTUs) closely related to microbes from subsurface or surface aquatic environments were mainly responsible for the clustering of samples according to water residence time in the pools. By contrast, several Cytophagaceae and Flavobacteriaceae OTUs were related to different floodings, which were also the main determinants of DOM composition. A subset of compounds distinguishable by molecular mass and O/C content were characteristic for individual floods. Moreover, there was a transformation of DOM in stagnant pools towards smaller and more aromatic compounds, potentially also reflecting microbial utilization. This article is protected by copyright. All rights reserved.
Authors:
Tanja Shabarova; Jörg Villiger; Oleg Morenkov; Jutta Niggemann; Thorsten Dittmar; Jakob Pernthaler
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-10
Journal Detail:
Title:  FEMS microbiology ecology     Volume:  -     ISSN:  1574-6941     ISO Abbreviation:  FEMS Microbiol. Ecol.     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8901229     Medline TA:  FEMS Microbiol Ecol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
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