Microbial metabolic potential of hydrothermal vent chimneys along the submarine ring of fire

被引:0
作者
Murray, Laura [1 ]
Fullerton, Heather [2 ]
Moyer, Craig L. [1 ]
机构
[1] Western Washington Univ, Dept Biol, Bellingham, WA 98229 USA
[2] Coll Charleston, Dept Biol, Charleston, SC USA
基金
美国国家科学基金会;
关键词
hydrothermal vents; chimneys; community structure; metagenomics; metabolism; OXIDIZING BACTERIA; NITROGEN-FIXATION; EXPLORER RIDGE; GUAYMAS BASIN; GENOME; ARCHAEA; NITRIFICATION; METAGENOMICS; POPULATIONS; DIVERSITY;
D O I
10.3389/fmicb.2024.1399422
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Hydrothermal vents host a diverse community of microorganisms that utilize chemical gradients from the venting fluid for their metabolisms. The venting fluid can solidify to form chimney structures that these microbes adhere to and colonize. These chimney structures are found throughout many different locations in the world's oceans. In this study, comparative metagenomic analyses of microbial communities on five chimney structures from around the Pacific Ocean were elucidated focusing on the core taxa and genes that are characteristic of each of these hydrothermal vent chimneys. The differences among the taxa and genes found at each chimney due to parameters such as physical characteristics, chemistry, and activity of the vents were highlighted. DNA from the chimneys was sequenced, assembled into contigs, and annotated for gene function. Genes used for carbon, oxygen, sulfur, nitrogen, iron, and arsenic metabolisms were found at varying abundances at each of the chimneys, largely from either Gammaproteobacteria or Campylobacteria. Many taxa shared an overlap of these functional metabolic genes, indicating that functional redundancy is critical for life at these hydrothermal vents. A high relative abundance of oxygen metabolism genes coupled with a low abundance of carbon fixation genes could be used as a unique identifier for inactive chimneys. Genes used for DNA repair, chemotaxis, and transposases were found at high abundances at each of these hydrothermal chimneys allowing for enhanced adaptations to the ever-changing chemical and physical conditions encountered.
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页数:15
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