Long-term exposure to increasing temperatures on scleractinian coral fragments reveals oxidative stress

Marta Dias, Ana M. Ferreira, Raúl Gouveia, Carolina Madeira, Nadia Jogee, Henrique Cabral, Mário Diniz, Catarina Vinagre

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Global warming is leading to increases in tropical storms' frequency and intensity, allowing fragmentation of reef-forming coral species, but also to coral bleaching and mortality. The first level of organism's response to an environmental perturbation occurs at the cellular level. This study investigated the long-term oxidative stress on fragments of nine Indo-Pacific reef-forming coral species exposed for 60 days to increasing temperatures (30 °C and 32 °C) and compared results with control temperature (26 °C). Coral overall condition (appearance), lipid peroxidation (LPO), catalase activity (CAT), and glutathione S-transferase (GST) were assessed. The species Turbinaria reniformis, Galaxea fascicularis, and Psammocora contigua were the most resistant to heat stress, presenting no oxidative damage at 30 °C. Unlike G. fasciularis, both T. reniformis and P. contigua showed no evidence of oxidative damage at 32 °C. All remaining species' fragments died at 32 °C. Stylophora pistillata and Pocillopora damicornis were the most susceptible species to heat stress, not resisting at 30 °C.

Original languageEnglish
Article number104758
JournalMarine Environmental Research
Volume150
DOIs
Publication statusPublished - 1 Sep 2019

Keywords

  • Antioxidant enzymes
  • Biomarker
  • Catalase activity
  • Climate change
  • Coral condition
  • Glutathione S-Transferase activity
  • Heat resistance
  • Heat stress
  • Lipid peroxidation

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