4.7 Article

Decreased pH impairs sea urchin resistance to predatory fish: A combined laboratory-field study to understand the fate of top-down processes in future oceans

期刊

MARINE ENVIRONMENTAL RESEARCH
卷 162, 期 -, 页码 -

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ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2020.105194

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Paracentrotus lividus; Ocean acidification; Overexploitation; Cascading effects; Coastal zone; Benthic ecology

资金

  1. Autonomous Region of Sardinia (RAS) [L.R. 7/2007]

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Changing oceans represent a serious threat for a wide range of marine organisms, with severe cascading effects on ecosystems and their services. Sea urchins are particularly sensitive to decreased pH expected for the end of the century and their key ecological role in regulating community structure and functioning could be seriously compromised. An integrated approach of laboratory and field experiments has been implemented to investigate the effects of decreased pH on predator-prey interaction involving sea urchins and their predators. Our results suggest that under future Ocean Acidification scenarios adult sea urchins defence strategies, such as spine length, test robustness and oral plate thickness, could be compromised together with their survival chance to natural predators. Sea urchins represent the critical linkage between top-down and bottom-up processes along Medi-terranean rocky reefs, and the cumulative impacts of global and local stressors could lead to a decline producing cascading effects on benthic ecosystems.

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