ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Coral bleaching research. Biochemist Sophie Richter with sample cuttings of coral. The cuttings are part of an experiment to study coral bleaching and its causes. In the study, cuttings are taken from colonies of coral (Pocillopora verrucosa) and kept at different depths. Samples are taken from the cuttings and analysed in a laboratory. Coral bleaching is a phenomenon where the coral expels its photosynthetic alga, often leading to coral mortality. It occurs when the coral is subjected to stress, usually an increase in temperature. Photographed at the Glorious Islands, in the Indian Ocean.
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