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dc.contributor.authorReis, Paula C.J.es_ES
dc.contributor.authorRuiz-González, Claraes_ES
dc.contributor.authorCrevecoeur, Sophiees_ES
dc.contributor.authorSoued, Cynthiaes_ES
dc.contributor.authorPrairie, Yves T.es_ES
dc.date.accessioned2020-08-07T08:01:32Z-
dc.date.available2020-08-07T08:01:32Z-
dc.date.issued2020-12-
dc.identifier.citationScience of the Total Environment 748: 141374 (2020)es_ES
dc.identifier.issn0048-9697-
dc.identifier.otherCEX2019-000928-S-
dc.identifier.urihttp://hdl.handle.net/10261/217557-
dc.description12 pages, 6 figures, supplementary data https://doi.org/10.1016/j.scitotenv.2020.141374es_ES
dc.description.abstractMethane-oxidizing bacteria (MOB) present in the water column mitigate methane (CH4) emissions from hydropower complexes to the atmosphere. By creating a discontinuity in rivers, dams cause large environmental variations, including in CH4 and oxygen concentrations, between upstream, reservoir, and downstream segments. Although highest freshwater methanotrophic activity is often detected at low oxygen concentrations, CH4 oxidation in well-oxygenated downstream rivers below dams has also been reported. Here we combined DNA and RNA high-throughput sequencing with microscopic enumeration (by CARD-FISH) and biogeochemical data to investigate the abundance, composition, and potential activity of MOB taxa from upstream to downstream waters in the tropical hydropower complex Batang Ai (Malaysia). High relative abundance of MOB (up to 61% in 16S rRNA sequences and 19% in cell counts) and enrichment of stable isotopic signatures of CH4 (up to 0‰) were detected in the hypoxic hypolimnion of the reservoir and in the outflowing downstream river. MOB community shifts along the river-reservoir system reflected environmental sorting of taxa and an interrupted hydrologic connectivity in which downstream MOB communities resembled reservoir's hypolimnetic communities but differed from upstream and surface reservoir communities. In downstream waters, CH4 oxidation was accompanied by fast cell growth of particular MOB taxa. Therefore, our results suggest that rapid shifts in active MOB communities allow the mitigation of CH4 emissions from different zones of hydropower complexes, including in quickly re-oxygenated rivers downstream of damses_ES
dc.description.sponsorshipThis study was supported by Natural Sciences and Engineering Research Council of Canada Discovery grants and Sarawak Energy Berhad and is a contribution to UNESCO Chair in Global Environmental Change. We also acknowledge financial support from the Groupe de recherche interuniversitaire en limnologie (GRIL), a strategic cluster of the Fonds de recherche du Québec Journal Pre-proof 28 - Nature et technologies (FRQNT). PCJR was supported by a merit doctoral scholarship from the Fonds de recherche du Québec - Nature et technologies (FRQNT)es_ES
dc.description.sponsorshipWith the funding support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S), of the Spanish Research Agency (AEI)-
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.isversionofPostprintes_ES
dc.rightsopenAccessen_EN
dc.subjectMethanotrophic bacteriaes_ES
dc.subjectMethanees_ES
dc.subjectReservoires_ES
dc.subjectHydropoweres_ES
dc.subjectTropicales_ES
dc.titleRapid shifts in methanotrophic bacterial communities mitigate methane emissions from a tropical hydropower reservoir and its downstream riveres_ES
dc.typeartículoes_ES
dc.identifier.doihttp://dx.doi.org/10.1016/j.scitotenv.2020.141374-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttps://doi.org/10.1016/j.scitotenv.2020.141374es_ES
dc.identifier.e-issn1879-1026-
dc.embargo.terms2021-07-31es_ES
dc.rights.licensehttps://www.elsevier.com/about/policies/sharinges_ES
dc.contributor.funderNatural Sciences and Engineering Research Council of Canadaes_ES
dc.contributor.funderUnited Nations Educational, Scientific and Cultural Organizationes_ES
dc.contributor.funderFonds de Recherche du Québeces_ES
dc.contributor.funderAgencia Estatal de Investigación (España)-
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/100005243es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000038es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100011033es_ES
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