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Effects of temperature on the diversity and community structure of known methanogenic groups and other archaea in high Arctic peat
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Effects of temperature on the diversity and community structure of known methanogenic groups and other archaea in high Arctic peat
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Journal Article
Effects of temperature on the diversity and community structure of known methanogenic groups and other archaea in high Arctic peat
2008
Overview
Archaeal populations are abundant in cold and temperate environments, but little is known about their potential response to climate change-induced temperature changes. The effects of temperature on archaeal communities in unamended slurries of weakly acidic peat from Spitsbergen were studied using a combination of fluorescent
in situ
hybridization (FISH), 16S rRNA gene clone libraries and denaturing gradient gel electrophoresis (DGGE). A high relative abundance of active archaeal cells (11–12% of total count) was seen at low temperatures (1 and 5 °C), and this community was dominated by Group 1.3b
Crenarchaeota
and the euryarchaeal clusters rice cluster V (RC-V), and Lake Dagow sediment (LDS). Increasing temperature reduced the diversity and relative abundance of these clusters. The methanogenic community in the slurries was diverse and included representatives of
Methanomicrobiales
,
Methanobacterium
,
Methanosarcina
and
Methanosaeta
. The overall relative abundance and diversity of the methanogenic archaea increased with increasing temperature, in accordance with a strong stimulation of methane production rates. However, DGGE profiling showed that the structure of this community changed with temperature and time. While the relative abundance of some populations was affected directly by temperature, the relative abundance of other populations was controlled by indirect effects or did not respond to temperature.
Publisher
Nature Publishing Group UK,Oxford University Press
Subject
/ Archaea - isolation & purification
/ Biomedical and Life Sciences
/ Clusters
/ Ecology
/ Fluorescence in situ hybridization
/ In Situ Hybridization, Fluorescence
/ Lakes
/ Methane
/ Methanobacterium - classification
/ Methanobacterium - isolation & purification
/ Methanomicrobiales - classification
/ Methanomicrobiales - genetics
/ Methanomicrobiales - isolation & purification
/ Methanosarcinaceae - classification
/ Methanosarcinaceae - genetics
/ Methanosarcinaceae - isolation & purification
/ Microbial Genetics and Genomics
/ Peat
/ RNA, Ribosomal, 16S - classification
/ RNA, Ribosomal, 16S - genetics
/ rRNA 16S
/ Slurries
/ Svalbard
