Data/hora: 11/06/2024 07:54:02

Provedor de dados: | 5
País: | France
Título: | Highly contrasted responses of Mediterranean octocorals to climate change along a depth gradient
Autores: | Pivotto, I. D.; Nerini, D.; Masmoudi, M.; Kara, H.; Chaoui, L.; Aurelle, D.
Data: | 2015-05
Ano: | 2015
Palavras-chave: | Climate change; Adaptation; Acclimatization; Eunicella cavolini; Mediterranean sea; Population genetics.
Resumo: | Climate change has a strong impact on marine ecosystems, including temperate species. Analysing the diversity of thermotolerance levels within species along with their genetic structure enables a better understanding of their potential response to climate change. We performed this integrative study on the Mediterranean octocoral Eunicella cavolini, with samples from different depths and by means of a common garden experiment. This species does not host photosynthetic Symbiodinium, enabling us to focus on the cnidarian response. We compared the thermotolerance of individuals from 20 m and 40 m depths from the same site and with replicates from the same colony. On the basis of an innovative statistical analysis of necrosis kinetics and risk, we demonstrated the occurrence of a very different response between depths at this local scale, with lower thermotolerance of deep individuals. Strongly thermotolerant individuals were observed at 20 m with necrosis appearing at higher temperatures than observed in situ. On the basis of nine microsatellite loci, we showed that these marked thermotolerance differences occur within a single population. This suggests the importance of acclimatization processes in adaptation to these different depths. In addition, differences between replicates demonstrated the occurrence of a variability of response between fragments from the same colony with the possibility of an interaction with a tank effect. Our results provide a basis for studying adaptation and acclimatization in Mediterranean octocorals in a heterogeneous environment.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00371/48264/48637.pdf

DOI:10.1098/rsos.140493

https://archimer.ifremer.fr/doc/00371/48264/

Editor: | Royal Soc
Formato: | application/pdf
Fonte: | Royal Society Open Science (2054-5703) (Royal Soc), 2015-05 , Vol. 2 , N. 5 , P. 140493 (1-11)

Fonte:

2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

info:eu-repo/semantics/openAccess

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