期刊
MARINE POLLUTION BULLETIN
卷 166, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.112256
关键词
Coral bleaching; Alacranes Reef; Marine Protected Area; Depth refugia; Heat stress metrics
资金
- Consejo Nacional de Ciencia y Tecnologia de Mexico (CONACyT) [340074]
- Secretaria de Medio Ambiente y Recursos Naturales (SEMARNAT) [PROCER/PNAA/02/2015]
- CINVESTAV-IPN [FOMIX-YUC-2014-C17246841]
- CONANP
- SEMAR
The research findings indicate that depth is the most relevant variable related to coral bleaching and severity, with deeper reefs being most affected; in addition, coral reefs with higher structural complexity are also among the most affected. Accumulated heat stress and thermal variation were identified as important drivers of coral bleaching.
Here we report the bleached coral cover and its drivers observed at Alacranes Reef in 2015. Our results show that 2015 was an unprecedented heat stress event. However, we observed low coral bleaching, with the most substantial impact on sites with a 10?20% of coral cover with bleaching. Depth was the most relevant variable related to coral bleaching and the bleaching severity index, with deeper reefs being most affected. Further, our results show that reefs with higher structural complexity based on species composition were among the most affected. We identified that accumulated heat stress and thermal variation in the last 28 days were relevant drivers of coral bleaching. This work highlights the importance of multidimensional frameworks in assessing the spatial variation of coral bleaching, demonstrating the importance of structural habitat variables such as depth in high heat stress events and at a reef scale.
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