Faunal mediated carbon export from mangroves in an arid area
The outwelling paradigm argues that mangrove and saltmarsh wetlands export much excess production to downstream marine systems. However, outwelling is difficult to quantify and currently 40–50% of fixed carbon is unaccounted for. Some carbon is thought outwelled through mobile fauna, including fish,...
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| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , , , |
| التنسيق: | article |
| منشور في: |
2020
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| الموضوعات: | |
| الوصول للمادة أونلاين: | http://dx.doi.org/10.1016/j.scitotenv.2020.142677 https://www.sciencedirect.com/science/article/pii/S0048969720362069 http://hdl.handle.net/10576/16945 |
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| _version_ | 1857415083773132800 |
|---|---|
| author | Walton, M.E.M. |
| author2 | Al-Maslamani, I. Chatting, M. Smyth, D. Castillo, A. Skov, M.W. Le Vay, L. |
| author2_role | author author author author author author |
| author_facet | Walton, M.E.M. Al-Maslamani, I. Chatting, M. Smyth, D. Castillo, A. Skov, M.W. Le Vay, L. |
| author_role | author |
| dc.creator.none.fl_str_mv | Walton, M.E.M. Al-Maslamani, I. Chatting, M. Smyth, D. Castillo, A. Skov, M.W. Le Vay, L. |
| dc.date.none.fl_str_mv | 2020-11-08T10:38:04Z 2020-10-03 |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://dx.doi.org/10.1016/j.scitotenv.2020.142677 M.E.M. Walton, I. Al-Maslamani, M. Chatting, et al., Faunal mediated carbon export from mangroves in an arid area, Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2020.142677 0048-9697 https://www.sciencedirect.com/science/article/pii/S0048969720362069 http://hdl.handle.net/10576/16945 1879-1026 |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Trophic relay Mangrove Carbon budget Outwelling hypothesis Mangrove litter Carbon flux Fish Food webs |
| dc.title.none.fl_str_mv | Faunal mediated carbon export from mangroves in an arid area |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | The outwelling paradigm argues that mangrove and saltmarsh wetlands export much excess production to downstream marine systems. However, outwelling is difficult to quantify and currently 40–50% of fixed carbon is unaccounted for. Some carbon is thought outwelled through mobile fauna, including fish, which visit and feed on mangrove produce during tidal inundation or early life stages before moving offshore, yet this pathway for carbon outwelling has never been quantified. We studied faunal carbon outwelling in three arid mangroves, where sharp isotopic gradients across the boundary between mangroves and down-stream systems permitted spatial differentiation of source of carbon in animal tissue. Stable isotope analysis (C, N, S) revealed 22–56% of the tissue of tidally migrating fauna was mangrove derived. Estimated consumption rates showed that 1.4% (38 kg C ha−1 yr−1) of annual mangrove litter production was directly consumed by migratory fauna, with <1% potentially exported. We predict that the amount of faunally-outwelled carbon is likely to be highly correlated with biomass of migratory fauna. While this may vary globally, the measured migratory fauna biomass in these arid mangroves was within the range of observations for mangroves across diverse biogeographic ranges and environmental settings. Hence, this study provides a generalized prediction of the relatively weak contribution of faunal migration to carbon outwelling from mangroves and the current proposition, that the unaccounted-for 40–50% of mangrove C is exported as dissolved inorganic carbon, remains plausible. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | qu_5e0a76aefcf136dd27da9cfec693d042 |
| identifier_str_mv | M.E.M. Walton, I. Al-Maslamani, M. Chatting, et al., Faunal mediated carbon export from mangroves in an arid area, Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2020.142677 0048-9697 1879-1026 |
| language_invalid_str_mv | en |
| network_acronym_str | qu |
| network_name_str | Qatar University repository |
| oai_identifier_str | oai:qspace.qu.edu.qa:10576/16945 |
| publishDate | 2020 |
| publisher.none.fl_str_mv | Elsevier |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| spelling | Faunal mediated carbon export from mangroves in an arid areaWalton, M.E.M.Al-Maslamani, I.Chatting, M.Smyth, D.Castillo, A.Skov, M.W.Le Vay, L.Trophic relayMangroveCarbon budgetOutwelling hypothesisMangrove litterCarbon fluxFishFood websThe outwelling paradigm argues that mangrove and saltmarsh wetlands export much excess production to downstream marine systems. However, outwelling is difficult to quantify and currently 40–50% of fixed carbon is unaccounted for. Some carbon is thought outwelled through mobile fauna, including fish, which visit and feed on mangrove produce during tidal inundation or early life stages before moving offshore, yet this pathway for carbon outwelling has never been quantified. We studied faunal carbon outwelling in three arid mangroves, where sharp isotopic gradients across the boundary between mangroves and down-stream systems permitted spatial differentiation of source of carbon in animal tissue. Stable isotope analysis (C, N, S) revealed 22–56% of the tissue of tidally migrating fauna was mangrove derived. Estimated consumption rates showed that 1.4% (38 kg C ha−1 yr−1) of annual mangrove litter production was directly consumed by migratory fauna, with <1% potentially exported. We predict that the amount of faunally-outwelled carbon is likely to be highly correlated with biomass of migratory fauna. While this may vary globally, the measured migratory fauna biomass in these arid mangroves was within the range of observations for mangroves across diverse biogeographic ranges and environmental settings. Hence, this study provides a generalized prediction of the relatively weak contribution of faunal migration to carbon outwelling from mangroves and the current proposition, that the unaccounted-for 40–50% of mangrove C is exported as dissolved inorganic carbon, remains plausible.Qatar National Research Foundation, National Priorities Research Programme research grant: NPRP 7 - 1302 - 1 - 242Elsevier2020-11-08T10:38:04Z2020-10-03Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1016/j.scitotenv.2020.142677M.E.M. Walton, I. Al-Maslamani, M. Chatting, et al., Faunal mediated carbon export from mangroves in an arid area, Science of the Total Environment, https://doi.org/10.1016/j.scitotenv.2020.1426770048-9697https://www.sciencedirect.com/science/article/pii/S0048969720362069http://hdl.handle.net/10576/169451879-1026enhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:qspace.qu.edu.qa:10576/169452025-07-27T17:44:05Z |
| spellingShingle | Faunal mediated carbon export from mangroves in an arid area Walton, M.E.M. Trophic relay Mangrove Carbon budget Outwelling hypothesis Mangrove litter Carbon flux Fish Food webs |
| status_str | publishedVersion |
| title | Faunal mediated carbon export from mangroves in an arid area |
| title_full | Faunal mediated carbon export from mangroves in an arid area |
| title_fullStr | Faunal mediated carbon export from mangroves in an arid area |
| title_full_unstemmed | Faunal mediated carbon export from mangroves in an arid area |
| title_short | Faunal mediated carbon export from mangroves in an arid area |
| title_sort | Faunal mediated carbon export from mangroves in an arid area |
| topic | Trophic relay Mangrove Carbon budget Outwelling hypothesis Mangrove litter Carbon flux Fish Food webs |
| url | http://dx.doi.org/10.1016/j.scitotenv.2020.142677 https://www.sciencedirect.com/science/article/pii/S0048969720362069 http://hdl.handle.net/10576/16945 |