Environmental control on the distribution of metabolic strategies of benthic microbial mats in Lake Fryxell, Antarctica.

Autor: Dillon ML; Ecology Department, Lawrence Berkeley National Laboratory, Berkeley, CA, United States of America.; Department of Earth and Planetary Sciences, University of California, Davis, Davis, California, United States of America., Hawes I; Coastal Marine Field Station, University of Waikato, Hamilton, Waikato, New Zealand., Jungblut AD; Life Sciences Department, Natural History Museum, London, England, United Kingdom., Mackey TJ; Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America., Eisen JA; Department of Evolution and Ecology, University of California, Davis, Davis, California, United States of America., Doran PT; Geology and Geophysics Department, Louisiana State University, Baton Rouge, Louisiana, United States of America., Sumner DY; Department of Earth and Planetary Sciences, University of California, Davis, Davis, California, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2020 Apr 13; Vol. 15 (4), pp. e0231053. Date of Electronic Publication: 2020 Apr 13 (Print Publication: 2020).
DOI: 10.1371/journal.pone.0231053
Abstrakt: Ecological theories posit that heterogeneity in environmental conditions greatly affects community structure and function. However, the degree to which ecological theory developed using plant- and animal-dominated systems applies to microbiomes is unclear. Investigating the metabolic strategies found in microbiomes are particularly informative for testing the universality of ecological theories because microorganisms have far wider metabolic capacity than plants and animals. We used metagenomic analyses to explore the relationships between the energy and physicochemical gradients in Lake Fryxell and the metabolic capacity of its benthic microbiome. Statistical analysis of the relative abundance of metabolic marker genes and gene family diversity shows that oxygenic photosynthesis, carbon fixation, and flavin-based electron bifurcation differentiate mats growing in different environmental conditions. The pattern of gene family diversity points to the likely importance of temporal environmental heterogeneity in addition to resource gradients. Overall, we found that the environmental heterogeneity of photosynthetically active radiation (PAR) and oxygen concentration ([O2]) in Lake Fryxell provide the framework by which metabolic diversity and composition of the community is structured, in accordance with its phylogenetic structure. The organization of the resulting microbial ecosystems are consistent with the maximum power principle and the species sorting model.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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