Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments
Anthropogenic stressors can alter the structure and functioning of infaunal communities, which are key drivers of the carbon cycle in marine soft sediments. Nonetheless, the compounded effects of anthropogenic stressors on carbon fluxes in soft benthic systems remain largely unknown. Here, we invest...
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Online Access: | http://hdl.handle.net/11568/1016259 https://doi.org/10.1111/gcb.14806 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2486 |
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ftunivpisairis:oai:arpi.unipi.it:11568/1016259 2024-04-14T08:17:41+00:00 Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments Ravaglioli C. Bulleri F. Ruhl S. McCoy S. J. Findlay H. S. Widdicombe S. Queiros A. M. Ravaglioli, C. Bulleri, F. Ruhl, S. Mccoy, S. J. Findlay, H. S. Widdicombe, S. Queiros, A. M. 2019 http://hdl.handle.net/11568/1016259 https://doi.org/10.1111/gcb.14806 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2486 eng eng info:eu-repo/semantics/altIdentifier/pmid/31535452 info:eu-repo/semantics/altIdentifier/wos/WOS:000494691700014 volume:25 issue:12 firstpage:4165 lastpage:4178 numberofpages:14 journal:GLOBAL CHANGE BIOLOGY http://hdl.handle.net/11568/1016259 doi:10.1111/gcb.14806 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85073960642 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2486 carbon sequestration climate change enhanced CO 2 hypoxia infauna macroalgal detritu multiple stressor stable isotope Carbon Carbon Cycle Geologic Sediment Human Hydrogen-Ion Concentration Carbon Dioxide Seawater info:eu-repo/semantics/article 2019 ftunivpisairis https://doi.org/10.1111/gcb.14806 2024-03-21T19:13:58Z Anthropogenic stressors can alter the structure and functioning of infaunal communities, which are key drivers of the carbon cycle in marine soft sediments. Nonetheless, the compounded effects of anthropogenic stressors on carbon fluxes in soft benthic systems remain largely unknown. Here, we investigated the cumulative effects of ocean acidification (OA) and hypoxia on the organic carbon fate in marine sediments, through a mesocosm experiment. Isotopically labelled macroalgal detritus (13C) was used as a tracer to assess carbon incorporation in faunal tissue and in sediments under different experimental conditions. In addition, labelled macroalgae (13C), previously exposed to elevated CO2, were also used to assess the organic carbon uptake by fauna and sediments, when both sources and consumers were exposed to elevated CO2. At elevated CO2, infauna increased the uptake of carbon, likely as compensatory response to the higher energetic costs faced under adverse environmental conditions. By contrast, there was no increase in carbon uptake by fauna exposed to both stressors in combination, indicating that even a short-term hypoxic event may weaken the ability of marine invertebrates to withstand elevated CO2 conditions. In addition, both hypoxia and elevated CO2 increased organic carbon burial in the sediment, potentially affecting sediment biogeochemical processes. Since hypoxia and OA are predicted to increase in the face of climate change, our results suggest that local reduction of hypoxic events may mitigate the impacts of global climate change on marine soft-sediment systems. Article in Journal/Newspaper Ocean acidification ARPI - Archivio della Ricerca dell'Università di Pisa Global Change Biology 25 12 4165 4178 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
carbon sequestration climate change enhanced CO 2 hypoxia infauna macroalgal detritu multiple stressor stable isotope Carbon Carbon Cycle Geologic Sediment Human Hydrogen-Ion Concentration Carbon Dioxide Seawater |
spellingShingle |
carbon sequestration climate change enhanced CO 2 hypoxia infauna macroalgal detritu multiple stressor stable isotope Carbon Carbon Cycle Geologic Sediment Human Hydrogen-Ion Concentration Carbon Dioxide Seawater Ravaglioli C. Bulleri F. Ruhl S. McCoy S. J. Findlay H. S. Widdicombe S. Queiros A. M. Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
topic_facet |
carbon sequestration climate change enhanced CO 2 hypoxia infauna macroalgal detritu multiple stressor stable isotope Carbon Carbon Cycle Geologic Sediment Human Hydrogen-Ion Concentration Carbon Dioxide Seawater |
description |
Anthropogenic stressors can alter the structure and functioning of infaunal communities, which are key drivers of the carbon cycle in marine soft sediments. Nonetheless, the compounded effects of anthropogenic stressors on carbon fluxes in soft benthic systems remain largely unknown. Here, we investigated the cumulative effects of ocean acidification (OA) and hypoxia on the organic carbon fate in marine sediments, through a mesocosm experiment. Isotopically labelled macroalgal detritus (13C) was used as a tracer to assess carbon incorporation in faunal tissue and in sediments under different experimental conditions. In addition, labelled macroalgae (13C), previously exposed to elevated CO2, were also used to assess the organic carbon uptake by fauna and sediments, when both sources and consumers were exposed to elevated CO2. At elevated CO2, infauna increased the uptake of carbon, likely as compensatory response to the higher energetic costs faced under adverse environmental conditions. By contrast, there was no increase in carbon uptake by fauna exposed to both stressors in combination, indicating that even a short-term hypoxic event may weaken the ability of marine invertebrates to withstand elevated CO2 conditions. In addition, both hypoxia and elevated CO2 increased organic carbon burial in the sediment, potentially affecting sediment biogeochemical processes. Since hypoxia and OA are predicted to increase in the face of climate change, our results suggest that local reduction of hypoxic events may mitigate the impacts of global climate change on marine soft-sediment systems. |
author2 |
Ravaglioli, C. Bulleri, F. Ruhl, S. Mccoy, S. J. Findlay, H. S. Widdicombe, S. Queiros, A. M. |
format |
Article in Journal/Newspaper |
author |
Ravaglioli C. Bulleri F. Ruhl S. McCoy S. J. Findlay H. S. Widdicombe S. Queiros A. M. |
author_facet |
Ravaglioli C. Bulleri F. Ruhl S. McCoy S. J. Findlay H. S. Widdicombe S. Queiros A. M. |
author_sort |
Ravaglioli C. |
title |
Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
title_short |
Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
title_full |
Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
title_fullStr |
Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
title_full_unstemmed |
Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
title_sort |
ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
publishDate |
2019 |
url |
http://hdl.handle.net/11568/1016259 https://doi.org/10.1111/gcb.14806 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2486 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/31535452 info:eu-repo/semantics/altIdentifier/wos/WOS:000494691700014 volume:25 issue:12 firstpage:4165 lastpage:4178 numberofpages:14 journal:GLOBAL CHANGE BIOLOGY http://hdl.handle.net/11568/1016259 doi:10.1111/gcb.14806 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85073960642 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2486 |
op_doi |
https://doi.org/10.1111/gcb.14806 |
container_title |
Global Change Biology |
container_volume |
25 |
container_issue |
12 |
container_start_page |
4165 |
op_container_end_page |
4178 |
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1796316942561181696 |