PMID- 15186345
OWN - NLM
STAT- MEDLINE
DCOM- 20040921
LR  - 20131121
IS  - 1462-2912 (Print)
IS  - 1462-2912 (Linking)
VI  - 6
IP  - 7
DP  - 2004 Jul
TI  - Adaptation of sympatric Achromatium spp. to different redox conditions as a 
      mechanism for coexistence of functionally similar sulphur bacteria.
PG  - 669-77
AB  - Changes in the abundance of sympatric Achromatium spp. in response to the 
      artificial manipulation of redox conditions in sediment microcosms was determined 
      by fluorescence in situ hybridization (FISH). Adaptation to different redox 
      conditions was shown to be one mechanism that supported the coexistence of 
      functionally similar Achromatium spp. In sediment microcosms, in which the 
      overlying water was oxygenated, Achromatium community size and composition 
      remained unchanged over time. However, imposition of anoxic conditions induced 
      changes in community structure. Anoxia caused a reduction in the relative 
      abundance of Achromatium sp. RY8 (72 +/- 4% to 49 +/- 2%) and an increase in 
      Achromatium sp. RY5 (19 +/- 5% to 32 +/- 3%) and a newly identified Achromatium 
      sp., RYKS (14 +/- 4% to 27 +/- 2%). In anoxic microcosms supplemented with a 
      single addition of nitrate at different initial concentrations the relative 
      decline in Achromatium sp. RY8 was dependent on the initial nitrate 
      concentration. In these experiments nitrate was rapidly removed. In contrast, 
      when high levels of nitrate were maintained by periodic replacement of the 
      overlying water with nitrate supplemented anoxic water, the composition of the 
      Achromatium community remained stable over time. This suggested that all of the 
      coexisting Achromatium spp. are obligate or facultative anaerobes, but, 
      Achromatium sp. RY8 was more sensitive to sediment redox conditions than the 
      other Achromatium species. Given the heterogeneous nature of sedimentary 
      environments, redox-related niche differentiation may promote coexistence of 
      sympatric Achromatium spp.
FAU - Gray, Neil D
AU  - Gray ND
AD  - School of Civil Engineering and Geosciences, University of Newcastle, Newcastle 
      upon Tyne, NE1 7RU, UK. n.d.gray@newcastle.ac.uk
FAU - Comaskey, Daria
AU  - Comaskey D
FAU - Miskin, Ian P
AU  - Miskin IP
FAU - Pickup, Roger W
AU  - Pickup RW
FAU - Suzuki, Keiko
AU  - Suzuki K
FAU - Head, Ian M
AU  - Head IM
LA  - eng
SI  - GENBANK/AY521179
SI  - GENBANK/AY521180
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Environ Microbiol
JT  - Environmental microbiology
JID - 100883692
RN  - 0 (DNA, Bacterial)
RN  - 0 (DNA, Ribosomal)
RN  - 0 (Nitrates)
RN  - 0 (RNA, Ribosomal, 16S)
RN  - 059QF0KO0R (Water)
RN  - 70FD1KFU70 (Sulfur)
RN  - S88TT14065 (Oxygen)
SB  - IM
MH  - *Adaptation, Physiological
MH  - Aerobiosis
MH  - Anaerobiosis
MH  - Colony Count, Microbial
MH  - DNA, Bacterial/chemistry/isolation & purification
MH  - DNA, Ribosomal/chemistry/isolation & purification
MH  - Ecosystem
MH  - Genes, rRNA/genetics
MH  - Geologic Sediments/*microbiology
MH  - Gram-Negative Aerobic Bacteria/*growth & development/isolation & 
      purification/*metabolism
MH  - In Situ Hybridization
MH  - Molecular Sequence Data
MH  - Nitrates/metabolism
MH  - Oxidation-Reduction
MH  - Oxygen/analysis
MH  - RNA, Ribosomal, 16S/genetics
MH  - Sequence Analysis, DNA
MH  - Staining and Labeling
MH  - Sulfur/metabolism
MH  - Water/chemistry
MH  - Water Microbiology
EDAT- 2004/06/10 05:00
MHDA- 2004/09/24 05:00
CRDT- 2004/06/10 05:00
PHST- 2004/06/10 05:00 [pubmed]
PHST- 2004/09/24 05:00 [medline]
PHST- 2004/06/10 05:00 [entrez]
AID - EMI607 [pii]
AID - 10.1111/j.1462-2920.2004.00607.x [doi]
PST - ppublish
SO  - Environ Microbiol. 2004 Jul;6(7):669-77. doi: 10.1111/j.1462-2920.2004.00607.x.