EditorialAlaskan reefs, built over centuries by the coralline algae C. nereostratum, are eroding in part because of overgrazing by herbivores like sea urchins. (J. Tomoleoni/U.S. Geological Survey via The New York Times)
EditorialAlaskan reefs, built over centuries by the coralline algae C. nereostratum, are eroding in part because of overgrazing by herbivores like sea urchins. (J. Tomoleoni/U.S. Geological Survey via The New York Times)
EditorialAlaskan reefs, built over centuries by the coralline algae C. nereostratum, are eroding in part because of overgrazing by herbivores like sea urchins. (J. Tomoleoni/U.S. Geological Survey via The New York Times)