Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region.
Coastal wetlands are ecosystems associated with intense carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) recycling, modulated by salinity and other environmental factors that influence the microbial community involved in greenhouse gases production and consumption. In this study, we evalu...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2022-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0271208 |
| _version_ | 1811196465763057664 |
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| author | Francisco Pozo-Solar Marcela Cornejo-D Ottone Roberto Orellana Daniela V Yepsen Nickolas Bassi Julio Salcedo-Castro Polette Aguilar-Muñoz Verónica Molina |
| author_facet | Francisco Pozo-Solar Marcela Cornejo-D Ottone Roberto Orellana Daniela V Yepsen Nickolas Bassi Julio Salcedo-Castro Polette Aguilar-Muñoz Verónica Molina |
| author_sort | Francisco Pozo-Solar |
| collection | DOAJ |
| description | Coastal wetlands are ecosystems associated with intense carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) recycling, modulated by salinity and other environmental factors that influence the microbial community involved in greenhouse gases production and consumption. In this study, we evaluated the influence of environmental factors on GHG concentration and benthic microbial community composition in coastal wetlands along the coast of the semiarid region. Wetlands were situated in landscapes along a south-north gradient of higher aridity and lower anthropogenic impact. Our results indicate that wetlands have a latitudinal variability associated with higher organic matter content at the north, especially in summer, and higher nutrient concentration at the south, predominantly in winter. During our sampling, wetlands were characterized by positive CO2 μM and CH4 nM excess, and a shift of N2O nM excess from negative to positive values from the north to the south. Benthic microbial communities were taxonomically diverse with > 60 phyla, especially in low frequency taxa. Highly abundant bacterial phyla were classified into Gammaproteobacteria (Betaproteobacteria order), Alphaproteobacteria and Deltaproteobacteria, including key functional groups such as nitrifying and methanotrophic bacteria. Generalized additive model (GAM) indicated that conductivity accounted for the larger variability of CH4 and CO2, but the predictions of CH4 and CO2 concentration were improved when latitude and pH concentration were included. Nitrate and latitude were the best predictors to account for the changes in the dissolved N2O distribution. Structural equation modeling (SEM), illustrated how the environment significantly influences functional microbial groups (nitrifiers and methane oxidizers) and their resulting effect on GHG distribution. Our results highlight the combined role of salinity and substrates of key functional microbial groups with metabolisms associated with both carbon and nitrogen, influencing dissolved GHG and their potential exchange in natural and anthropogenically impacted coastal wetlands. |
| first_indexed | 2024-04-12T00:58:11Z |
| format | Article |
| id | doaj.art-ae1c2d6a8ddf43bab9b3e071db48cfcd |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-12T00:58:11Z |
| publishDate | 2022-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-ae1c2d6a8ddf43bab9b3e071db48cfcd2022-12-22T03:54:33ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01179e027120810.1371/journal.pone.0271208Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region.Francisco Pozo-SolarMarcela Cornejo-D OttoneRoberto OrellanaDaniela V YepsenNickolas BassiJulio Salcedo-CastroPolette Aguilar-MuñozVerónica MolinaCoastal wetlands are ecosystems associated with intense carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) recycling, modulated by salinity and other environmental factors that influence the microbial community involved in greenhouse gases production and consumption. In this study, we evaluated the influence of environmental factors on GHG concentration and benthic microbial community composition in coastal wetlands along the coast of the semiarid region. Wetlands were situated in landscapes along a south-north gradient of higher aridity and lower anthropogenic impact. Our results indicate that wetlands have a latitudinal variability associated with higher organic matter content at the north, especially in summer, and higher nutrient concentration at the south, predominantly in winter. During our sampling, wetlands were characterized by positive CO2 μM and CH4 nM excess, and a shift of N2O nM excess from negative to positive values from the north to the south. Benthic microbial communities were taxonomically diverse with > 60 phyla, especially in low frequency taxa. Highly abundant bacterial phyla were classified into Gammaproteobacteria (Betaproteobacteria order), Alphaproteobacteria and Deltaproteobacteria, including key functional groups such as nitrifying and methanotrophic bacteria. Generalized additive model (GAM) indicated that conductivity accounted for the larger variability of CH4 and CO2, but the predictions of CH4 and CO2 concentration were improved when latitude and pH concentration were included. Nitrate and latitude were the best predictors to account for the changes in the dissolved N2O distribution. Structural equation modeling (SEM), illustrated how the environment significantly influences functional microbial groups (nitrifiers and methane oxidizers) and their resulting effect on GHG distribution. Our results highlight the combined role of salinity and substrates of key functional microbial groups with metabolisms associated with both carbon and nitrogen, influencing dissolved GHG and their potential exchange in natural and anthropogenically impacted coastal wetlands.https://doi.org/10.1371/journal.pone.0271208 |
| spellingShingle | Francisco Pozo-Solar Marcela Cornejo-D Ottone Roberto Orellana Daniela V Yepsen Nickolas Bassi Julio Salcedo-Castro Polette Aguilar-Muñoz Verónica Molina Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region. PLoS ONE |
| title | Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region. |
| title_full | Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region. |
| title_fullStr | Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region. |
| title_full_unstemmed | Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region. |
| title_short | Dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the Chilean coast semiarid region. |
| title_sort | dissolved greenhouse gases and benthic microbial communities in coastal wetlands of the chilean coast semiarid region |
| url | https://doi.org/10.1371/journal.pone.0271208 |
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