Methane Production by Seagrass Ecosystems in the Red Sea

Handle URI:
http://hdl.handle.net/10754/626322
Title:
Methane Production by Seagrass Ecosystems in the Red Sea
Authors:
Garcias Bonet, Neus ( 0000-0001-6469-7167 ) ; Duarte, Carlos M. ( 0000-0002-1213-1361 )
Abstract:
Atmospheric methane (CH) is the second strongest greenhouse gas and it is emitted to the atmosphere naturally by different sources. It is crucial to define the dimension of these natural emissions in order to forecast changes in atmospheric CH mixing ratio in future scenarios. However, CH emissions by seagrass ecosystems in shallow marine coastal systems have been neglected although their global extension. Here we quantify the CH production rates of seagrass ecosystems in the Red Sea. We measured changes in CH concentration and its isotopic signature by cavity ring-down spectroscopy on chambers containing sediment and plants. We detected CH production in all the seagrass stations with an average rate of 85.09 ± 27.80 μmol CH m d. Our results show that there is no seasonal or daily pattern in the CH production rates by seagrass ecosystems in the Red Sea. Taking in account the range of global estimates for seagrass coverage and the average seagrass CH production, the global CH production and emission by seagrass ecosystems could range from 0.09 to 2.7 Tg yr. Because CH emission by seagrass ecosystems had not been included in previous global CH budgets, our estimate would increase the contribution of marine global emissions, hitherto estimated at 9.1 Tg yr, by about 30%. Thus, the potential contribution of seagrass ecosystems to marine CH emissions provides sufficient evidence of the relevance of these fluxes as to include seagrass ecosystems in future assessments of the global CH budgets.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Garcias-Bonet N, Duarte CM (2017) Methane Production by Seagrass Ecosystems in the Red Sea. Frontiers in Marine Science 4. Available: http://dx.doi.org/10.3389/fmars.2017.00340.
Publisher:
Frontiers Media SA
Journal:
Frontiers in Marine Science
Issue Date:
7-Nov-2017
DOI:
10.3389/fmars.2017.00340
Type:
Article
ISSN:
2296-7745
Sponsors:
This research was supported by King Abdullah University of Science and Technology (KAUST) through the baseline fund to CD. We thank Paloma Carrillo de Albornoz for her assistance during field and laboratory work. We also thank the crew of R/V Thuwal for their assistance in our field work during the scientific cruise.
Additional Links:
https://www.frontiersin.org/articles/10.3389/fmars.2017.00340/full
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorGarcias Bonet, Neusen
dc.contributor.authorDuarte, Carlos M.en
dc.date.accessioned2017-12-07T13:16:39Z-
dc.date.available2017-12-07T13:16:39Z-
dc.date.issued2017-11-07en
dc.identifier.citationGarcias-Bonet N, Duarte CM (2017) Methane Production by Seagrass Ecosystems in the Red Sea. Frontiers in Marine Science 4. Available: http://dx.doi.org/10.3389/fmars.2017.00340.en
dc.identifier.issn2296-7745en
dc.identifier.doi10.3389/fmars.2017.00340en
dc.identifier.urihttp://hdl.handle.net/10754/626322-
dc.description.abstractAtmospheric methane (CH) is the second strongest greenhouse gas and it is emitted to the atmosphere naturally by different sources. It is crucial to define the dimension of these natural emissions in order to forecast changes in atmospheric CH mixing ratio in future scenarios. However, CH emissions by seagrass ecosystems in shallow marine coastal systems have been neglected although their global extension. Here we quantify the CH production rates of seagrass ecosystems in the Red Sea. We measured changes in CH concentration and its isotopic signature by cavity ring-down spectroscopy on chambers containing sediment and plants. We detected CH production in all the seagrass stations with an average rate of 85.09 ± 27.80 μmol CH m d. Our results show that there is no seasonal or daily pattern in the CH production rates by seagrass ecosystems in the Red Sea. Taking in account the range of global estimates for seagrass coverage and the average seagrass CH production, the global CH production and emission by seagrass ecosystems could range from 0.09 to 2.7 Tg yr. Because CH emission by seagrass ecosystems had not been included in previous global CH budgets, our estimate would increase the contribution of marine global emissions, hitherto estimated at 9.1 Tg yr, by about 30%. Thus, the potential contribution of seagrass ecosystems to marine CH emissions provides sufficient evidence of the relevance of these fluxes as to include seagrass ecosystems in future assessments of the global CH budgets.en
dc.description.sponsorshipThis research was supported by King Abdullah University of Science and Technology (KAUST) through the baseline fund to CD. We thank Paloma Carrillo de Albornoz for her assistance during field and laboratory work. We also thank the crew of R/V Thuwal for their assistance in our field work during the scientific cruise.en
dc.publisherFrontiers Media SAen
dc.relation.urlhttps://www.frontiersin.org/articles/10.3389/fmars.2017.00340/fullen
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectCavity ring-down spectroscopyen
dc.subjectGreenhouse gasen
dc.subjectMethaneen
dc.subjectRed Seaen
dc.subjectSeagrass ecosystemsen
dc.titleMethane Production by Seagrass Ecosystems in the Red Seaen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalFrontiers in Marine Scienceen
dc.eprint.versionPublisher's Version/PDFen
kaust.authorGarcias Bonet, Neusen
kaust.authorDuarte, Carlos M.en
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