Mortality, growth and regeneration following fragmentation of reef-forming corals under thermal stress
| Autor: | Ana Maria Reis Ferreira, Catarina Vinagre, Rui Cereja, Marta Dias, Raúl Gouveia |
|---|---|
| Přispěvatelé: | Repositório da Universidade de Lisboa |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Coral bleaching Coral Effects of global warming on oceans ved/biology.organism_classification_rank.species Zoology Thermal stress Hermatypic coral Aquatic Science Oceanography 010603 evolutionary biology 01 natural sciences Galaxea fascicularis 14. Life underwater Reef Ecology Evolution Behavior and Systematics Fragmentation (reproduction) geography geography.geographical_feature_category biology Turbinaria reniformis ved/biology 010604 marine biology & hydrobiology Global climate change fungi Coral regeneration biology.organism_classification Bleaching geographic locations |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Journal of Sea Research |
| ISSN: | 1385-1101 |
| Popis: | Storms inflict damage to corals resulting in fragments that have the potential to regenerate thus contributing to the asexual reproduction of the parental colony. Extreme climatic events like these are predicted to increase in the future due to ocean warming, which is also the primary cause of coral reef bleaching and consequent coral mortality in the tropical and subtropical seas. This way it is urgent to investigate the differential effect of warming over post-fragmentation and regeneration processes among the scleractinian hermatypic coral species. This study investigated the mortality, growth and regeneration capacity of nine reef-forming coral species of the Indo-Pacific. Fragments were exposed to 26 °C, 30 °C, and 32 °C for 60 days. Half of these fragments was inflicted with one injury and the other half was used as control. Mortality, partial mortality, bleaching level, growth and regeneration of artificial injuries were assessed. Mortality increased with temperature, reaching 100% for most species after 60 days, at 32 °C, but Psammocora contigua which showed remarkably lower mortality (40%) and all coral fragments of Turbinaria reniformis and Galaxea fascicularis survived the experiment. Partial mortality was lowest for P. contigua, T. reniformis, and G. fascicularis even at 32 °C. These three coral species were also the most resistant to bleaching. Growth rates decreased with temperature, with the exception of G. fascicularis that maintained similar growth rates at 26 °C and 30 °C. Regeneration rates generally increased with temperature. It was concluded that P. contigua, T. reniformis, and G. fascicularis fragments show higher capacity to withstand higher temperatures. |
| Databáze: | OpenAIRE |
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