Dataset Information

Draft Genome Sequence from a Putative New Genus and Species in the Family Methanoregulaceae Isolated from the Anoxic Basin of Lake Untersee in East Antarctica.

ABSTRACT: Here, we report the draft genome sequence for a new putative genus and species in the Methanoregulaceae family, whose members are generally slow-growing rod-shaped or coccoid methanogenic archaea. The information on this sediment-dwelling organism sheds light on the prokaryotes inhabiting isolated, deep, and extremely cold methane-rich environments.

SUBMITTER: Wagner NY

PROVIDER: S-EPMC6498233 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Publications

Draft Genome Sequence from a Putative New Genus and Species in the Family <i>Methanoregulaceae</i> Isolated from the Anoxic Basin of Lake Untersee in East Antarctica.

Wagner Nicole Y NY Hahn Aria S AS Andersen Dale D Wilhelm Mary Beth MB Morgan-Lang Connor C Vanderwilt Mia M Johnson Sarah Stewart SS

Microbiology resource announcements 20190502 18

Here, we report the draft genome sequence for a new putative genus and species in the <i>Methanoregulaceae</i> family, whose members are generally slow-growing rod-shaped or coccoid methanogenic archaea. The information on this sediment-dwelling organism sheds light on the prokaryotes inhabiting isolated, deep, and extremely cold methane-rich environments. ...[more]

PMID: 31048378

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Project description:Ultra-oligotrophic Lake Untersee is among the largest and deepest surface lakes of Central Queen Maud Land in East Antarctica. It is dammed at its north end by the Anuchin Glacier and the ice-cover dynamics are controlled by sublimation - not melt - as the dominating ablation process and therefore surface melt during austral summer does not provide significant amounts of water for recharge compared to subsurface melt of the Anuchin Glacier. Several studies have already described the structure and function of the microbial communities within the water column and benthic environments of Lake Untersee, however, thus far there have been no studies that examine the linkages between the lake ecosystem with that of the surrounding soils or the Anuchin Glacier. The glacier may also play an important role as a major contributor of nutrients and biota into the lake ecosystem. Based on microbial 16S rRNA amplicon sequencing, we showed that the dominant bacterial signatures in Lake Untersee, the Anuchin Glacier and its surrounding soils were affiliated with Actinobacteria, Bacteroidetes, Cyanobacteria, Firmicutes, and Proteobacteria. Aerosol and local soil depositions on the glacier surface resulted in distinct microbial communities developing in glacier ice and cryoconite holes. Based on a source tracking algorithm, we found that cryoconite microbial assemblages were a potential source of organisms, explaining up to 36% of benthic microbial mat communities in the lake. However, the major biotic sources for the lake ecosystem are still unknown, illustrating the possible importance of englacial and subglacial zones. The Anuchin Glacier may be considered as a vector in a biological sense for the bacterial colonization of the perennially ice-covered Lake Untersee. However, despite a thick perennial ice cover, observed "lift-off" microbial mats escaping the lake make a bidirectional transfer of biota plausible. Hence, there is an exchange of biota between Lake Untersee and connective habitats possible despite the apparent sealing by a perennial ice cover and the absence of moat areas during austral summer.

Dataset Information

Draft Genome Sequence from a Putative New Genus and Species in the Family Methanoregulaceae Isolated from the Anoxic Basin of Lake Untersee in East Antarctica.

Publications

Draft Genome Sequence from a Putative New Genus and Species in the Family <i>Methanoregulaceae</i> Isolated from the Anoxic Basin of Lake Untersee in East Antarctica.

Similar Datasets

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