Chemolithoautotroph distributions across the subsurface of a convergent margin.

Autor: Rogers TJ; University of Tennessee, Knoxville, TN, USA., Buongiorno J; Division of Natural Sciences, Maryville College, Maryville, TN, USA., Jessen GL; Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile.; Center for Oceanographic Research COPAS COASTAL, Universidad de Concepción, Valdivia, Chile., Schrenk MO; Michigan State University, East Lansing, MI, USA., Fordyce JA; University of Tennessee, Knoxville, TN, USA., de Moor JM; National University of Costa Rica, Heredia, Costa Rica.; University of New Mexico, Albuquerque, NM, USA., Ramírez CJ; Servicio Geológico Ambiental, Heredia, Costa Rica., Barry PH; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA, USA., Yücel M; Institute of Marine Sciences, Middle East Technical University, Erdemli, Turkey., Selci M; Department of Biology, University of Naples -Federico II, Naples, Italy., Cordone A; Department of Biology, University of Naples -Federico II, Naples, Italy., Giovannelli D; Department of Biology, University of Naples -Federico II, Naples, Italy.; Department of Marine and Coastal Science, Rutgers University, Rutgers, NJ, USA.; Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan.; National Research Council - Institute of Marine Biological Resources and Biotechnologies - CNR-IRBIM, Ancona, Italy., Lloyd KG; University of Tennessee, Knoxville, TN, USA. klloyd@utk.edu.
Jazyk: angličtina
Zdroj: The ISME journal [ISME J] 2023 Jan; Vol. 17 (1), pp. 140-150. Date of Electronic Publication: 2022 Oct 18.
DOI: 10.1038/s41396-022-01331-7
Abstrakt: Subducting oceanic crusts release fluids rich in biologically relevant compounds into the overriding plate, fueling subsurface chemolithoautotrophic ecosystems. To understand the impact of subsurface geochemistry on microbial communities, we collected fluid and sediments from 14 natural springs across a ~200 km transect across the Costa Rican convergent margin and performed shotgun metagenomics. The resulting 404 metagenome-assembled genomes (MAGs) cluster into geologically distinct regions based on MAG abundance patterns: outer forearc-only (25% of total relative abundance), forearc/arc-only (38% of total relative abundance), and delocalized (37% of total relative abundance) clusters. In the outer forearc, Thermodesulfovibrionia, Candidatus Bipolaricaulia, and Firmicutes have hydrogenotrophic sulfate reduction and Wood-Ljungdahl (WL) carbon fixation pathways. In the forearc/arc, Anaerolineae, Ca. Bipolaricaulia, and Thermodesulfovibrionia have sulfur oxidation, nitrogen cycling, microaerophilic respiration, and WL, while Aquificae have aerobic sulfur oxidation and reverse tricarboxylic acid carbon fixation pathway. Transformation-based canonical correspondence analysis shows that MAG distribution corresponds to concentrations of aluminum, iron, nickel, dissolved inorganic carbon, and phosphate. While delocalized MAGs appear surface-derived, the subsurface chemolithoautotrophic, metabolic, and taxonomic landscape varies by the availability of minerals/metals and volcanically derived inorganic carbon. However, the WL pathway persists across all samples, suggesting that this versatile, energy-efficient carbon fixation pathway helps shape convergent margin subsurface ecosystems.
(© 2022. The Author(s), under exclusive licence to International Society for Microbial Ecology.)
Databáze: MEDLINE
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