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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Higher Abundance of Sediment Methanogens and Methanotrophs Do Not Predict the Atmospheric Methane and Carbon Dioxide Flows in Eutrophic Tropical Freshwater Reservoirs

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Author(s):
Pierangeli, Gabrielle Maria Fonseca [1] ; Domingues, Mercia Regina [2] ; de Jesus, Tatiane Araujo [2] ; Coelho, Lucia Helena Gomes [2] ; Hanisch, Werner Siegfried [3] ; Pompeo, Marcelo Luiz Martins [4] ; Saia, Flavia Talarico [1] ; Gregoracci, Gustavo Bueno [1] ; Benassi, Roseli Frederigi [2]
Total Authors: 9
Affiliation:
[1] Univ Fed Sao Paulo, Inst Marine Sci, Santos, SP - Brazil
[2] Fed Univ ABC, Ctr Engn Modeling & Appl Social Sci, Santo Andre, SP - Brazil
[3] Univ Fed Sao Paulo, Chem Engn Dept, Diadema - Brazil
[4] State Univ Sao Paulo, Ecol Dept, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: FRONTIERS IN MICROBIOLOGY; v. 12, MAR 17 2021.
Web of Science Citations: 3
Abstract

Freshwater reservoirs emit greenhouse gases (GHGs) such as methane (CH4) and carbon dioxide (CO2), contributing to global warming, mainly when impacted by untreated sewage and other anthropogenic sources. These gases can be produced by microbial organic carbon decomposition, but little is known about the microbiota and its participation in GHG production and consumption in these environments. In this paper we analyzed the sediment microbiota of three eutrophic tropical urban freshwater reservoirs, in different seasons and evaluated the correlations between microorganisms and the atmospheric CH4 and CO2 flows, also correlating them to limnological variables. Our results showed that deeper water columns promote high methanogen abundance, with predominance of acetoclastic Methanosaeta spp. and hydrogenotrophs Methanoregula spp. and Methanolinea spp. The aerobic methanotrophic community was affected by dissolved total carbon (DTC) and was dominated by Crenothrix spp. However, both relative abundance of the total methanogenic and aerobic methanotrophic communities in sediments were uncoupled to CH4 and CO2 flows. Network based approach showed that fermentative microbiota, including Leptolinea spp. and Longilinea spp., which produces substrates for methanogenesis, influence CH4 flows and was favored by anthropogenic pollution, such as untreated sewage loads. Additionally, less polluted conditions favored probable anaerobic methanotrophs such as Candidatus Bathyarchaeota, Sva0485, NC10, and MBG-D/DHVEG-1, which promoted lower gaseous flows, confirming the importance of sanitation improvement to reduce these flows in tropical urban freshwater reservoirs and their local and global warming impact. (AU)

FAPESP's process: 19/23767-1 - Relationship between limnological variables (abiotic and biotic) and seasonality in the flow of CH4 and CO2 gases in fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)
Grantee:Joice Teixeira Silva Rodrigues
Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
FAPESP's process: 18/20417-7 - Relation between limnological variables (abiotic and biotic) and seasonality in CH4 and CO2 gas fluxes in fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)
Grantee:Nicolas Pereira Andrade
Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
FAPESP's process: 17/10355-1 - Relation between limnological variables (abiotic and biotic) and seasonality in CH4 and CO2 gas fluxes in the fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)
Grantee:Roseli Frederigi Benassi
Support Opportunities: Regular Research Grants