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Article Dans Une Revue Proceedings of the Royal Society B: Biological Sciences Année : 2017

Corals hosting symbiotic hydrozoans are less susceptible to predation and disease

Simone Montano
  • Fonction : Auteur
Simone Fattorini
  • Fonction : Auteur
Michael Berumen
  • Fonction : Auteur
Paolo Galli
  • Fonction : Auteur
Davide Maggioni
  • Fonction : Auteur
Roberto Arrigoni
  • Fonction : Auteur
Davide Seveso
  • Fonction : Auteur
Giovanni Strona
  • Fonction : Auteur

Résumé

In spite of growing evidence that climate change may dramatically affect networks of interacting species, whether- and to what extent-ecological interactions can mediate species' responses to disturbances is an open question. Here we show how a largely overseen association such as that between hydrozoans and scleractinian corals could be possibly associated with a reduction in coral susceptibility to ever-increasing predator and disease outbreaks. We examined 2455 scleractinian colonies (from both Maldivian and the Saudi Arabian coral reefs) searching for non-random patterns in the occurrence of hydrozoans on corals showing signs of different health conditions (i.e. bleaching, algal overgrowth, corallivory and different coral diseases). We show that, after accounting for geographical, ecological and co-evolutionary factors, signs of disease and corallivory are significantly lower in coral colonies hosting hydrozoans than in hydrozoan-free ones. This finding has important implications for our understanding of the ecology of coral reefs, and for their conservation in the current scenario of global change, because it suggests that symbiotic hydrozoans may play an active role in protecting their scleractinian hosts from stresses induced by warming water temperatures.

Dates et versions

hal-01929391 , version 1 (21-11-2018)

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Citer

Simone Montano, Simone Fattorini, Valeriano Parravicini, Michael Berumen, Paolo Galli, et al.. Corals hosting symbiotic hydrozoans are less susceptible to predation and disease. Proceedings of the Royal Society B: Biological Sciences, 2017, 284 (1869), ⟨10.1098/rspb.2017.2405⟩. ⟨hal-01929391⟩
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