2026-04-17T03:53:27Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1259682025-12-05T09:46:26Zcom_2072_1057col_2072_478778col_2072_478917

00925njm 22002777a 4500 dc Crisci, C. author Ledoux, Jean-Baptiste author Mokhtar-Jamai, K. author Bally, M. author Bensoussan, Nathaniel author Aurelle, D. author Cebrian Pujol, Emma author Coma, R. author Feral, J. -P. author La Riviere, M. author Linares Prats, Cristina author López Sendino, Paula author Marschal, C. author Ribes i Llordés, Marta author Teixidó Ullod, Núria author Zuberer, Frederic author Garrabou Vancells, Joaquim author 2018-11-09T15:13:36Z 2018-11-09T15:13:36Z 2017-07-11 2018-11-09T15:13:36Z The differential response of marine populations to climate change remains poorly understood. Here, we combine common garden thermotolerance experiments in aquaria and population genetics to disentangle the factors driving the population response to thermal stress in a temperate habitatforming species: the octocoral Paramuricea clavata. Using eight populations separated from tens of meters to hundreds of kilometers, which were differentially impacted by recent mortality events, we identify 25 degrees C as a critical thermal threshold. After one week of exposure at this temperature, seven of the eight populations were affected by tissue necrosis and after 30 days of exposure at this temperature, the mean % of affected colonies increased gradually from 3 to 97%. We then demonstrate the weak relation between the observed differential phenotypic responses and the local temperature regimes experienced by each population. A significant correlation was observed between these responses and the extent of genetic drift impacting each population. Local adaptation may thus be hindered by genetic drift, which seems to be the main driver of the differential response. Accordingly, conservation measures should promote connectivity and control density erosion in order to limit the impact of genetic drift on marine populations facing climate change. Biodiversitat Medi ambient Fauna marina Biodiversity Natural environment Marine fauna Regional and local environmental conditions do not shape the response to warming of a marine habitat-forming species