SPACES team members, Tim McClanahan and Nyawira Muthiga have used SPACES coral reef survey data in an analysis of the factors affecting coral’s susceptibility to coral bleaching in the face of warmer climates.

The analysis based on surveys from E. Africa to Fiji during the 2016 El Nino event showed that bleaching is caused by a range of stressors on reefs.

In terms of geography, the researchers found that bleaching depended greatly on where the corals lived along the longitudinal gradient from East Africa to Fiji. Worryingly for E. African coastal states, their reefs appeared to show the strongest bleaching response to heat stress.

A longer write up of the article can be found here:

https://www.sciencedaily.com/releases/2019/10/191002165228.htm

And the full reference for the study, in Nature Climate Change is here:

Tim R. McClanahan, Emily S. Darling, Joseph M. Maina, Nyawira A. Muthiga, Stéphanie D ’agata, Stacy D. Jupiter, Rohan Arthur, Shaun K. Wilson, Sangeeta Mangubhai, […]

SPACES coral reef surveys have contributed to an international picture of how reefs might be able to grow to keep up with sea-level rise, recently published in Nature.

The growth of coral reefs is strongly influenced by the amount and types of coral living on the reef surface, but across both regions this growth is now being hampered by combinations of coral disease, deteriorating water quality and fishing pressure, along with severe impacts from “coral bleaching” caused by climate change. By counting the organisms responsible for building up and eroding reefs, SPACES team members Chris Perry and Fraser Januchowski-Hartley have been able to calculate the ‘carbonate budget’ and estimate how quickly reefs can grow towards the surface (the ‘accretion rate’).

In the figure below, the Mozambican (17) and Kenyan (18) SPACES sites can be seen in comparison to reefs from around the Indian ocean and Western Atlantic. The poorest reefs in […]