| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Highly contrasted responses of Mediterranean octocorals to climate change along a depth gradient
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| Autores: |
Pivotto, I. D.
Nerini, D.
Masmoudi, M.
Kara, H.
Chaoui, L.
Aurelle, D.
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| Data: |
2015-05
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| Ano: |
2015
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| Palavras-chave: |
Climate change
Adaptation
Acclimatization
Eunicella cavolini
Mediterranean sea
Population genetics
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| 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00371/48264/48637.pdf
DOI:10.1098/rsos.140493
https://archimer.ifremer.fr/doc/00371/48264/
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| Editor: |
Royal Soc
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| Formato: |
application/pdf
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| Fonte: |
Royal Society Open Science (2054-5703) (Royal Soc), 2015-05 , Vol. 2 , N. 5 , P. 140493 (1-11)
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| Direitos: |
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
restricted use
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