PMID- 19052630
OWN - NLM
STAT- MEDLINE
DCOM- 20090320
LR  - 20090219
IS  - 1751-7370 (Electronic)
IS  - 1751-7362 (Linking)
VI  - 3
IP  - 3
DP  - 2009 Mar
TI  - Seasonal dynamics of SAR11 populations in the euphotic and mesopelagic zones of 
      the northwestern Sargasso Sea.
PG  - 283-95
LID - 10.1038/ismej.2008.117 [doi]
AB  - Bacterioplankton belonging to the SAR11 clade of a-proteobacteria were counted by 
      fluorescence in situ hybridization (FISH) over eight depths in the surface 300 m 
      at the Bermuda Atlantic Time-series Study (BATS) site from 2003 to 2005. SAR11 
      are dominant heterotrophs in oligotrophic systems; thus, resolving their temporal 
      dynamics can provide important insights to the cycling of organic and inorganic 
      nutrients. This quantitative time-series data revealed distinct annual 
      distribution patterns of SAR11 abundance in the euphotic (0-120) and upper 
      mesopelagic (160-300 m) zones that were reproducibly correlated with seasonal 
      mixing and stratification of the water column. Terminal restriction fragment 
      length polymorphism (T-RFLP) data generated from a decade of samples collected at 
      BATS were combined with the FISH data to model the annual dynamics of SAR11 
      subclade populations. 16S rRNA gene clone libraries were constructed to verify 
      the correlation of the T-RFLP data with SAR11 clade structure. Clear vertical and 
      temporal transitions were observed in the dominance of three SAR11 ecotypes. The 
      mechanisms that lead to shifts between the different SAR11 populations are not 
      well understood, but are probably a consequence of finely tuned physiological 
      adaptations that partition the populations along physical and chemical gradients 
      in the ecosystem. The correlation between evolutionary descent and 
      temporal/spatial patterns we describe, confirmed that a minimum of three SAR11 
      ecotypes occupy the Sargasso Sea surface layer, and revealed new details of their 
      population dynamics.
FAU - Carlson, Craig A
AU  - Carlson CA
AD  - Department of Ecology, Evolution, and Marine Biology, University of 
      California-Santa Barbara, CA, USA.
FAU - Morris, Robert
AU  - Morris R
FAU - Parsons, Rachel
AU  - Parsons R
FAU - Treusch, Alexander H
AU  - Treusch AH
FAU - Giovannoni, Stephen J
AU  - Giovannoni SJ
FAU - Vergin, Kevin
AU  - Vergin K
LA  - eng
SI  - GENBANK/EU984307
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PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20081204
PL  - England
TA  - ISME J
JT  - The ISME journal
JID - 101301086
RN  - 0 (DNA, Bacterial)
RN  - 0 (DNA, Ribosomal)
RN  - 0 (RNA, Bacterial)
RN  - 0 (RNA, Ribosomal, 16S)
SB  - IM
MH  - Alphaproteobacteria/*growth & development
MH  - Bermuda
MH  - *Biodiversity
MH  - Cloning, Molecular
MH  - Colony Count, Microbial/methods
MH  - DNA Fingerprinting
MH  - DNA, Bacterial/chemistry/genetics
MH  - DNA, Ribosomal/chemistry/genetics
MH  - Gene Library
MH  - Genes, rRNA
MH  - In Situ Hybridization, Fluorescence
MH  - Molecular Sequence Data
MH  - Phylogeny
MH  - Polymorphism, Restriction Fragment Length
MH  - RNA, Bacterial/genetics
MH  - RNA, Ribosomal, 16S/genetics
MH  - Seasons
MH  - Seawater/*microbiology
MH  - Sequence Analysis, DNA
MH  - Sequence Homology, Nucleic Acid
EDAT- 2008/12/05 09:00
MHDA- 2009/03/21 09:00
CRDT- 2008/12/05 09:00
PHST- 2008/12/05 09:00 [pubmed]
PHST- 2009/03/21 09:00 [medline]
PHST- 2008/12/05 09:00 [entrez]
AID - ismej2008117 [pii]
AID - 10.1038/ismej.2008.117 [doi]
PST - ppublish
SO  - ISME J. 2009 Mar;3(3):283-95. doi: 10.1038/ismej.2008.117. Epub 2008 Dec 4.