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May 14, 2026Coral ReefsOpen Access

Reducing local stressors enhances the resistance of the coral Mussismilia hispida and the zoantharian Palythoa caribaeorum to global stressors in island reefs under marginal conditions

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Authors

AMAmanda E. B. MarianoMMMiguel MiesDADenis M S Abessa

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Overview

Randomized trial shows that reducing local stressors improves coral bleaching resistance in Brazilian reefs, suggesting protective measures are crucial.

Key Points

  • The aim was to assess how local tourism affects coral bleaching in Brazilian reefs under global heating conditions.
  • Colony surveys of Mussismilia hispida and Palythoa caribaeorum using photoquadrats along transects over five periods.
  • Assessment across zones with high, low, and no tourism to determine bleaching incidence.
  • Monitoring took place during thermal stress episodes, particularly the Fourth Global Bleaching Event.
  • Bleaching rates reached 59% for Palythoa caribaeorum and 43% for Mussismilia hispida in high tourism zones.
  • In no tourism zones, bleaching rates were minimal, ≤ 10% for P. caribaeorum and ≤ 17% for M. hispida.
  • Local pressures, particularly tourism, significantly amplified coral bleaching across monitored islands.

Cite This Study

Mariano et al. (2026) studied this question.

synapsesocial.com/papers/6a0567a8a550a87e60a1fd66https://doi.org/10.1007/s00338-026-02879-y
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