Drivers of coral bleaching in a Marine Protected Area of the Southern Gulf of Mexico during the 2015 event

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 th...

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Veröffentlicht in:Marine pollution bulletin 2021-05, Vol.166, p.112256-112256, Article 112256
Hauptverfasser: Muñiz-Castillo, Aarón Israel, Arias-González, Jesús Ernesto
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description 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. •2015 was an unprecedented heat stress event with low coral bleaching in the area.•Depth best predicts bleaching with higher affectation in deeper reefs.•Coral reefs with high species richness and functionality were more susceptible.•Thermal metrics with a 28-days window are relevant thermal indicators.
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subjects Alacranes Reef
Animals
Anthozoa
Community composition
Coral bleaching
Coral Reefs
Depth refugia
Ecosystem
Gulf of Mexico
Heat
Heat stress
Heat stress metrics
Heat tolerance
Heat-Shock Response
Marine invertebrates
Marine parks
Marine Protected Area
Marine protected areas
Protected areas
Reefs
Spatial variations
Species composition
title Drivers of coral bleaching in a Marine Protected Area of the Southern Gulf of Mexico during the 2015 event
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