TY - JOUR
T1 - Unexpected population distribution in a microbial mat community
T2 - Sulfate-reducing bacteria localized to the highly oxic chemocline in contrast to a eukaryotic preference for anoxia
AU - Minz, Dror
AU - Fishbain, Susan
AU - Green, Stefan J.
AU - Muyzer, Gerard
AU - Cohen, Yehuda
AU - Rittmann, Bruce E.
AU - Stahl, David A.
PY - 1999/10
Y1 - 1999/10
N2 - The distribution and abundance of sulfate-reducing bacteria (SRB) and eukaryotes within the upper 4 mm of a hypersaline cyanobacterial mat community were characterized at high resolution with group-specific hybridization probes to quantify 16S rRNA extracted from 100-μm depth intervals. This revealed a preferential localization of SRB within the region defined by the oxygen chemocline. Among the different groups of SRB quantified, including members of the provisional families 'Desulfovibrionaceae' and 'Desulfobacteriaceae,' Desulfonema-like populations dominated and accounted for up to 30% of total rRNA extracted from certain depth intervals of the chemocline. These data suggest that recognized genera of SRB are not necessarily restricted by high levels of oxygen in this mat community and the possibility of significant sulfur cycling within the chemocline. In marked contrast, eukaryotic populations in this community demonstrated a preference for regions of anoxia.
AB - The distribution and abundance of sulfate-reducing bacteria (SRB) and eukaryotes within the upper 4 mm of a hypersaline cyanobacterial mat community were characterized at high resolution with group-specific hybridization probes to quantify 16S rRNA extracted from 100-μm depth intervals. This revealed a preferential localization of SRB within the region defined by the oxygen chemocline. Among the different groups of SRB quantified, including members of the provisional families 'Desulfovibrionaceae' and 'Desulfobacteriaceae,' Desulfonema-like populations dominated and accounted for up to 30% of total rRNA extracted from certain depth intervals of the chemocline. These data suggest that recognized genera of SRB are not necessarily restricted by high levels of oxygen in this mat community and the possibility of significant sulfur cycling within the chemocline. In marked contrast, eukaryotic populations in this community demonstrated a preference for regions of anoxia.
UR - http://www.scopus.com/inward/record.url?scp=0032864978&partnerID=8YFLogxK
U2 - 10.1128/aem.65.10.4659-4665.1999
DO - 10.1128/aem.65.10.4659-4665.1999
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C2 - 10508103
AN - SCOPUS:0032864978
SN - 0099-2240
VL - 65
SP - 4659
EP - 4665
JO - Applied and Environmental Microbiology
JF - Applied and Environmental Microbiology
IS - 10
ER -