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Ravaglioli, C, Bulleri, F, Ruhl, S, McCoy, SJ, Findlay, HS, Widdicombe, S and Queiros, AM 2019 Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments. Global Change Biology, 25 (12). 4165-4178. https://doi.org/10.1111/gcb.14806
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Ravaglioli et al._inpress_GCB_Ocean Acidification.pdf - Accepted Version Available under License Creative Commons Attribution Non-commercial. Download (635kB) | Preview |
Abstract/Summary
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.
| Item Type: | Publication - Article |
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| Additional Information. Not used in RCUK Gateway to Research.: | This is the peer reviewed version of the following article: Ravaglioli, C; Bulleri, F; Ruhl, S; McCoy, SJ; Findlay, HS; Widdicombe, S; Queiros, AM. 2019 Ocean acidification and hypoxia alter organic carbon fluxes in marine soft sediments. Global Change Biology, 25 (12). 4165-4178, which has been published in final form at https://doi.org/10.1111/gcb.14806. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
| Divisions: | Plymouth Marine Laboratory > National Capability categories > Added Value Plymouth Marine Laboratory > Science Areas > Marine Ecology and Biodiversity |
| Depositing User: | S Hawkins |
| Date made live: | 16 Oct 2019 11:33 |
| Last Modified: | 18 Sep 2020 01:58 |
| URI: | https://plymsea.ac.uk/id/eprint/8251 |
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