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April 3, 2026Coral ReefsOpen Access

Thermal stress reveals contrasting bleaching and trophic patterns in two Southwestern Atlantic octocorals

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Authors

LPLuciana Gomes PinheiroGPGuilherme Toledo Alves PatrocinioMMMiguel Mies

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Overview

Reveals how thermal stress affects bleaching and feeding strategies in two octocoral species, indicating species-specific responses.

Key Points

  • To investigate the effects of thermal stress on bleaching and trophic ecology in two octocoral species from the Southwestern Atlantic.
  • Tested two octocoral species under elevated temperature (+3.5 °C) for 14 days
  • Evaluated symbiosis through symbiont density and chlorophyll-a content
  • Assessed trophic ecology using fatty acid markers
  • Analyzed oxidative status through total antioxidant capacity and lipid peroxidation
  • Both octocoral species experienced bleaching due to thermal stress, but through different mechanisms
  • Plexaurella grandiflora showed reduced symbiont density, compensating with increased heterotrophic feeding
  • N. atlantica had decreased chlorophyll-a content but maintained a stable trophic balance
  • Oxidative status remained unaffected in both species, suggesting bleaching may not be directly linked to oxidative stress

Cite This Study

Pinheiro et al. (2026) studied this question.

synapsesocial.com/papers/69cf5cb15a333a821460a47ahttps://doi.org/10.1007/s00338-026-02856-5
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