Coral reefs get a helping hand
A new method of distinguishing live from dead corals should make it easier to gauge the health of reef ecosystems. Coral mapping using an airborne spectrographic imager over reefs in Rangiroa Atoll, French Polynesia, gave results comparable to those made on the ground, showing that aerial mapping can give a good estimate of the cover of live coral.
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Reference: Nature 413, 36 (2001)