Ocean Acidification Changing Mussel Shell Structure

For thousands of years, California mussel shells have been made up of long, cylindrical calcite crystals organized in neat, vertical rows. But scientists have found that as ocean acidification has accelerated over the past 15 years, these shells have undergone dramatic structural changes, being built out of unorganized, uneven minerals instead.

The window for saving the world’s coral reefs is rapidly closing

For the first time, an international team of researchers has measured the escalating rate of coral bleaching at locations throughout the tropics over the past four decades. The study documents a dramatic shortening of the gap between pairs of bleaching events, threatening the future existence of these iconic ecosystems and the livelihoods of many millions of people.