Analysis of recruitment of Pocillopora damicornis under climate change scenarios

Ocean warming and acidification are among the greatest threats to coral reefs, and
severe bleaching events have become more common in recent decades, putting coral reefs  at risk of extinction. The loss of coral reefs would have a catastrophic cascading effect on all marine life and would mean a loss of one the world’s largest pools of biodiversity.  There have been many studies conducted on the individual effects of warming and  acidification on coral response, but not as many that attempt to assess the combined  effect, which could possibly be synergistic. This study looks at the individual and  combined effects of warming and acidification on Pocillopora damicornis under four  different treatments: ambient, heated, acidified, and heated/acidified, in a multi-annual mesocosm experiment. P. damicornis were able to recruit under these stressors, and the  recruits were measured for size, condition, and abundance during two separate  assessments and the differences across treatments and within treatments were analyzed. The results showed that more bleaching occurred in the heated treatments than in the non-heated treatments, and that mean size significantly increased in the treatments with acidification from July to October.

Tran T., 2017. Analysis of recruitment of Pocillopora damicornis under climate change scenarios. BSc thesis, University of Hawai’i at Mānoa, 21 p. Thesis.

 

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