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Title

Thermal threshold and sensitivity of the only symbiotic Mediterranean gorgonian Eunicella singularis by morphometric and genotypic analyses

Publication Year

2013

Author(s)
  • Pey, Alexis
  • Cataneo, Jerome
  • Forcioli, Didier
  • Merle, Pierre-Laurent
  • Furla, Paola
Source
COMPTES RENDUS BIOLOGIES Volume: 336 Issue: 7 Pages: 331-341 Published: 2013
ISSN
1631-0691
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 degrees C led to rapid and complete tissue necrosis for all four populations. However, at 27 degrees 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. (C) 2013 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

Author Keyword(s)
  • Global climate change
  • Gorgonian
  • Mass mortalities
  • Thermal threshold
  • Thermotolerance
  • Mediterranean Sea
KeyWord(s) Plus
  • MASS MORTALITY EVENTS
  • MOLECULAR DIVERSITY
  • BENTHIC COMMUNITIES
  • CLIMATE-CHANGE
  • SUMMER 1999
  • SEA
  • CORALS
  • THERMOTOLERANCE
  • INVERTEBRATES
  • ADAPTATION
ESI Discipline(s)
  • Biology & Biochemistry
Web of Science Category(ies)
  • Biology
Adress(es)

[Pey, Alexis; Cataneo, Jerome; Forcioli, Didier; Merle, Pierre-Laurent; Furla, Paola] Univ Nice Sophia Antipolis, Equipe Symbiose Marine, Fac Sci, UMR Systemat Adaptat Evolut 7138, F-06108 Nice 02, France; [Pey, Alexis; Cataneo, Jerome; Forcioli, Didier; Merle, Pierre-Laurent; Furla, Paola] Univ Paris 06, F-75252 Paris 05, France; [Pey, Alexis; Cataneo, Jerome; Forcioli, Didier; Merle, Pierre-Laurent; Furla, Paola] CNRS, UMR Systemat Adaptat Evolut 7138, F-75252 Paris 05, France

Reprint Adress

Merle, PL (reprint author), Univ Nice Sophia Antipolis, Equipe Symbiose Marine, UMR7138, Parc Valrose,PB 71, F-06108 Nice 02, France.

Country(ies)
  • France
CNRS - Adress(es)
  • Evolution Paris Seine, UMR7138
Accession Number
WOS:000324084900002
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