Document Detail


Ocean currents shape the microbiome of Arctic marine sediments.
MedLine Citation:
PMID:  23190727     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Prokaryote communities were investigated on the seasonally stratified Alaska Beaufort Shelf (ABS). Water and sediment directly underlying water with origin in the Arctic, Pacific or Atlantic oceans were analyzed by pyrosequencing and length heterogeneity-PCR in conjunction with physicochemical and geographic distance data to determine what features structure ABS microbiomes. Distinct bacterial communities were evident in all water masses. Alphaproteobacteria explained similarity in Arctic surface water and Pacific derived water. Deltaproteobacteria were abundant in Atlantic origin water and drove similarity among samples. Most archaeal sequences in water were related to unclassified marine Euryarchaeota. Sediment communities influenced by Pacific and Atlantic water were distinct from each other and pelagic communities. Firmicutes and Chloroflexi were abundant in sediment, although their distribution varied in Atlantic and Pacific influenced sites. Thermoprotei dominated archaea in Pacific influenced sediments and Methanomicrobia dominated in methane-containing Atlantic influenced sediments. Length heterogeneity-PCR data from this study were analyzed with data from methane-containing sediments in other regions. Pacific influenced ABS sediments clustered with Pacific sites from New Zealand and Chilean coastal margins. Atlantic influenced ABS sediments formed another distinct cluster. Density and salinity were significant structuring features on pelagic communities. Porosity co-varied with benthic community structure across sites and methane did not. This study indicates that the origin of water overlying sediments shapes benthic communities locally and globally and that hydrography exerts greater influence on microbial community structure than the availability of methane.
Authors:
Leila J Hamdan; Richard B Coffin; Masoumeh Sikaroodi; Jens Greinert; Tina Treude; Patrick M Gillevet
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2012-11-29
Journal Detail:
Title:  The ISME journal     Volume:  7     ISSN:  1751-7370     ISO Abbreviation:  ISME J     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-19     Completed Date:  2013-09-30     Revised Date:  2014-04-01    
Medline Journal Info:
Nlm Unique ID:  101301086     Medline TA:  ISME J     Country:  England    
Other Details:
Languages:  eng     Pagination:  685-96     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Alaska
Archaea / classification*,  genetics
Arctic Regions
Bacteria / classification*,  genetics
Biodiversity
Euryarchaeota / classification,  genetics
Geologic Sediments / chemistry,  microbiology*
Metagenome*
Pacific Ocean
Phylogeny
RNA, Ribosomal, 16S / genetics
Chemical
Reg. No./Substance:
0/RNA, Ribosomal, 16S
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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