Long-term exposure to increasing temperatures on scleractinian coral fragments reveals oxidative stress
Dias, M.; Ferreira, A.; Gouveia, R.; Madeira, C.; Jogee, N.; Cabral, H.N.; Diniz, M.S.; Vinagre, C. (2019). Long-term exposure to increasing temperatures on scleractinian coral fragments reveals oxidative stress. Mar. Environ. Res. 150: 104758. https://dx.doi.org/10.1016/j.marenvres.2019.104758
In: Marine Environmental Research. Applied Science Publishers: Barking. ISSN 0141-1136; e-ISSN 1879-0291, more
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| Keyword |
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| Author keywords |
Biomarker; Antioxidant enzymes; Lipid peroxidation; Catalase activity; Glutathione S-Transferase activity; Coral condition; Heat stress; Heat resistance |
| Authors | | Top |
- Dias, M.
- Ferreira, A.
- Gouveia, R.
- Madeira, C.
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- Jogee, N.
- Cabral, H.N.
- Diniz, M.S.
- Vinagre, C.
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| 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. |
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