Temporal changes in archaeal diversity and chemistry in a mid-ocean ridge subseafloor habitat.

Applied and Environmental Microbiology
Julie A HuberJohn A Baross

Abstract

The temporal variation in archaeal diversity in vent fluids from a midocean ridge subseafloor habitat was examined using PCR-amplified 16S rRNA gene sequence analysis and most-probable-number (MPN) cultivation techniques targeting hyperthermophiles. To determine how variations in temperature and chemical characteristics of subseafloor fluids affect the microbial communities, we performed molecular phylogenetic and chemical analyses on diffuse-flow vent fluids from one site shortly after a volcanic eruption in 1998 and again in 1999 and 2000. The archaeal population was divided into particle-attached (>3-microm-diameter cells) and free-living fractions to test the hypothesis that subseafloor microorganisms associated with active hydrothermal systems are adapted for a lifestyle that involves attachment to solid surfaces and formation of biofilms. To delineate between entrained seawater archaea and the indigenous subseafloor microbial community, a background seawater sample was also examined and found to consist only of Group I Crenarchaeota and Group II Euryarchaeota, both of which were also present in vent fluids. The indigenous subseafloor archaeal community consisted of clones related to both mesophilic and hyperthermophilic M...Continue Reading

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Citations

Jan 19, 2006·Extremophiles : Life Under Extreme Conditions·Margarita L Miroshnichenko, Elizaveta A Bonch-Osmolovskaya
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Oct 6, 2007·Science·Julie A HuberMitchell L Sogin
Apr 16, 2013·Applied and Environmental Microbiology·William J BrazeltonMatthew O Schrenk
Sep 8, 2006·Applied and Environmental Microbiology·William J BrazeltonJohn A Baross
Oct 6, 2006·Applied and Environmental Microbiology·Satoshi NakagawaKoki Horikoshi
Jun 6, 2003·Applied and Environmental Microbiology·Matthew O SchrenkJohn A Baross
Sep 6, 2003·Applied and Environmental Microbiology·Peter R GirguisEdward F DeLong
Apr 7, 2004·Applied and Environmental Microbiology·Mostafa S ElshahedLee R Krumholz
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