Rising Sea Temperatures Killing Vital Algae

Rising sea temperatures are killing phytoplankton, the microscopic organisms that feed the lower rungs of the food chain in the world's oceans and create much of our oxygen, scientists say. Researchers at Dalhousie University in Nova Scotia used a combination of old records and newer satellite images to determine a 40% drop in algae since 1950 and a drop of about 1% annually over the last century. "A global decline of this magnitude? It's quite shocking," said a lead author of the study in Nature.

"This is the tip of the iceberg, in some respects," added the researcher. "Phytoplankton are key to the whole ecosystem. In terms of climate changes, the effect on fisheries, we don't know exactly what these effects will be." The Wall Street Journal and the Los Angeles Times have more details.
(More plankton stories.)