Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments
Abstract 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,...
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crwiley:10.1111/gcb.14806 2024-09-09T20:01:19+00:00 Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments Ravaglioli, Chiara Bulleri, Fabio Rühl, Saskia McCoy, Sophie J. Findlay, Helen S. Widdicombe, Stephen Queirós, Ana M. Natural Environment Research Council Ministero dell’Istruzione, dell’Università e della Ricerca 2019 http://dx.doi.org/10.1111/gcb.14806 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14806 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14806 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14806 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 25, issue 12, page 4165-4178 ISSN 1354-1013 1365-2486 journal-article 2019 crwiley https://doi.org/10.1111/gcb.14806 2024-08-27T04:31:55Z Abstract 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 ( 13 C) was used as a tracer to assess carbon incorporation in faunal tissue and in sediments under different experimental conditions. In addition, labelled macroalgae ( 13 C), previously exposed to elevated CO 2 , were also used to assess the organic carbon uptake by fauna and sediments, when both sources and consumers were exposed to elevated CO 2 . At elevated CO 2 , 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 CO 2 conditions. In addition, both hypoxia and elevated CO 2 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 Wiley Online Library Global Change Biology 25 12 4165 4178 |
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English |
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Abstract 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 ( 13 C) was used as a tracer to assess carbon incorporation in faunal tissue and in sediments under different experimental conditions. In addition, labelled macroalgae ( 13 C), previously exposed to elevated CO 2 , were also used to assess the organic carbon uptake by fauna and sediments, when both sources and consumers were exposed to elevated CO 2 . At elevated CO 2 , 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 CO 2 conditions. In addition, both hypoxia and elevated CO 2 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 |
Natural Environment Research Council Ministero dell’Istruzione, dell’Università e della Ricerca |
format |
Article in Journal/Newspaper |
author |
Ravaglioli, Chiara Bulleri, Fabio Rühl, Saskia McCoy, Sophie J. Findlay, Helen S. Widdicombe, Stephen Queirós, Ana M. |
spellingShingle |
Ravaglioli, Chiara Bulleri, Fabio Rühl, Saskia McCoy, Sophie J. Findlay, Helen S. Widdicombe, Stephen Queirós, Ana M. Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments |
author_facet |
Ravaglioli, Chiara Bulleri, Fabio Rühl, Saskia McCoy, Sophie J. Findlay, Helen S. Widdicombe, Stephen Queirós, Ana M. |
author_sort |
Ravaglioli, Chiara |
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 |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1111/gcb.14806 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fgcb.14806 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14806 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/gcb.14806 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Global Change Biology volume 25, issue 12, page 4165-4178 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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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1809933136941809664 |