A few decades ago, dozens of species in Monterey Bay were on the verge of extinction. Today, many of those species are now thriving. This success story is the subject of “Big Blue Live,” a three-night television special that begins on Monday. PBS and the BBC are producing the show, which airs from 8 to 9 pm.

Despite the successes in Monterey Bay, oceans throughout the world are facing a new threat: acidification. Many local businesses, including Hog Island Oyster Farm, are seeing the effects.

 KQED’s Scott Shafer explains.

KQED NEWSROOM is a weekly news magazine program that airs on television, radio and online. Watch Fridays at 8 p.m. on KQED Public Television 9, listen on Sundays at 6 p.m. on KQED Public Radio 88.5 FM, or watch online here.