办事指南

Warming seas kill coral – but some are beginning to resist the heat

点击量:   时间:2019-03-04 05:11:01

By Katarina Zimmer REPEATING an experiment 47 years after it was originally carried out has revealed some rare good news about corals: some species appear to have become significantly better at surviving temperature increases. In 1970, marine zoologist Steve Coles collected three species of coral from a reef in Kane’ohe Bay, Hawaii. When he put them in a chamber and gradually heated the water, he found that they couldn’t tolerate increases of 1 to 2°C. They started to bleach, ejecting the colourful algae that live within them. Without these, coral die. Overall, no corals from one species survived,