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Vulnerability of six cold-water corals to sediment resuspension from bottom trawling fishing
Bilan, M.; Gori, A.; Grinyó, J.; Biel-Cabanelas, M.; Puigcerver-Segarra, X.; Santin, A.; Piraino, S.; Rossi, S.; Puig, P. (2023). Vulnerability of six cold-water corals to sediment resuspension from bottom trawling fishing. Mar. Pollut. Bull. 196: 115423. https://dx.doi.org/10.1016/j.marpolbul.2023.115423
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, meer
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| Auteurs | | Top |
- Bilan, M.
- Gori, A.
- Grinyó, J., meer
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- Biel-Cabanelas, M.
- Puigcerver-Segarra, X.
- Santin, A.
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- Piraino, S., meer
- Rossi, S.
- Puig, P.
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| Abstract |
Bottom trawling can significantly affect benthic communities, directly through immediate removal of sessile organisms and indirectly through sediment resuspension. Submarine canyons, often surrounded by fishing grounds, are important habitats for cold-water corals (CWC). Vulnerability of CWCs to increased suspended sediment concentration (SSC) is key to understanding the severity of bottom trawling effects on those communities. Here we show survival, growth, and physiological response of six CWCs from a Mediterranean submarine canyon (Dendrophyllia cornigera, Desmophyllum dianthus, Desmophyllum pertusum, Madrepora oculata, Leiopathes glaberrima and Muriceides lepida), exposed to a long-term, aquarium-based sedimentary disturbance experiment. Compared to cup coral and octocoral, which did not exhibit symptoms of distress, our data indicate that colonial scleractinian corals and black coral, which experienced substantial polyp mortality in enhanced SSC treatments, are more vulnerable. Indirect impact of bottom trawling could thus contribute to structural simplification of CWC communities posing an additional stressor alongside with global climate change. |
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