Thermal threshold and sensitivity of the only symbiotic Mediterranean gorgonian Eunicella singularis by morphometric and genotypic analyses
Pey, A.; Catanéo, J.; Forcioli, D.; Merle, P.-L.; Furla, P. (2013). Thermal threshold and sensitivity of the only symbiotic Mediterranean gorgonian Eunicella singularis by morphometric and genotypic analyses. C. R., Biol. 336(7): 331-341. https://dx.doi.org/10.1016/j.crvi.2013.06.008
In: Comptes Rendus. Biologies. Elsevier: Paris. ISSN 1631-0691; e-ISSN 1768-3238, meer
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| Trefwoorden |
Alcyonacea [WoRMS]
Marien/Kust |
| Author keywords |
Global climate change; Gorgonian; Mass mortalities; Thermal threshold; Thermotolerance; Mediterranean Sea |
| Auteurs | | Top | Dataset |
- Pey, A.
- Catanéo, J.
- Forcioli, D.
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| Abstract |
The only symbiotic Mediterranean gorgonian, Eunicella singularis, has faced several mortality events connected to abnormal high temperatures. Since thermotolerance data remain scarce, heat-induced necrosis was monitored in aquarium by morphometric analysis. Gorgonian tips were sampled at two sites: Medes (Spain) and Riou (France) Islands, and at two depths: –15 m and–35 m. Although coming from contrasting thermal regimes, seawater above 28 °C led to rapid and complete tissue necrosis for all four populations. However, at 27 °C, the time length leading to 50% tissue necrosis allowed us to classify samples within three classes of thermal sensitivity. Irrespectively of the depth, Medes specimens were either very sensitive or resistant, while Riou fragments presented a medium sensitivity. Microsatellite analysis revealed that host and symbiont were genetically differentiated between sites, but not between depths. Finally, these genetic differentiations were not directly correlated to a specific thermal sensitivity whose molecular bases remain to be discovered. |
| Dataset |
- CorMedNet- Distribution and demographic data of habitat-forming invertebrate species from Mediterranean coralligenous assemblages between 1882 and 2019., meer
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