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Biodiversity makes reef fish more resilient in the face of climate change, research confirms

May 17, 2016 — New research confirms that biodiversity can help reef fish weather the impacts of global warming.

Reef systems with greater numbers of fish species are not just more productive but also more resilient to rising sea-surface temperatures and the temperature swings associated with climate change, according to a new study led by researchers with the Smithsonian’s Tennenbaum Marine Observatories Network.

After analyzing data from more than 4,500 fish surveys of reefs around the world to compare the effects of biodiversity and other environmental factors on global reef fish biomass, the authors of the study found that biodiversity, measured by the number of species (species diversity) and the variety of functional traits (functional diversity) within a reef system, was one of the strongest predictors of fish biomass, second only to mean sea-surface temperature.

A direct impact of the carbon emissions that continue to concentrate in Earth’s atmosphere is warmer, more acidic ocean waters, which has contributed to the bleaching of reefs around the world. Just last month, scientists announced that 99 percent of coral reefs surveyed in Australia’s Great Barrier Reef have been hit by the global bleaching event that has already taken a toll on reefs at the Pacific islands of Hawaii, Vanuatu, American Samoa, and Fiji, as well as parts of the Caribbean, the Florida Keys, and the Indian Ocean.

Read the full story at Mongabay

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