In a ray of optimism, some of the most common Hawaiian coral species may be able to survive long periods of stressful ocean conditions caused by climate change.
During the 22-month project, researchers collected samples of three of the most common Hawaiian coral species and placed them in tanks with different seawater temperature and acidity levels that signify present and future oceanic conditions. At the end, the study showed that more of the corals that experienced warmer waters did perish, but 61 percent of them still survived.
A branching finger coral species known as Porites was especially tolerant of ocean warming and acidification, with 71 percent of the corals surviving after almost two years had elapsed. As key components of Hawaiian coral reefs, their resilience may help sustain some ocean biodiversity within Hawai’i.
“Our study found that in the absence of local stressors such as nutrient pollution, overfishing, bottom trawling, physical damage from tourism, etc., at least half of Hawaiian reef corals will be able to survive and persist in up to 22 months exposure to ocean warming and acidification,” McLachlan, “The results provide hope that if we can mitigate climate change and keep within the targets of the Paris Climate Agreement, coral reefs will persist in some form.”
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