Fair-weather friends

 作者:仓外     |      日期:2019-03-07 05:14:00
By Jon Copley FEARS that global warming will kill off the world’s coral reefs may be misplaced. Instead of signalling impending doom, the widespread bleaching of reefs may be a risky gamble by corals to adapt to warmer seas, according to a marine biologist in New York. When the going gets tough, corals ditch their symbiotic algae to find partners better suited to their new surroundings. Reef-building corals contain single-celled algae that photosynthesise in return for their lodging. But this partnership is precarious—if light or temperature change for any length of time,