Marine Biomass Dwindles In Face Of Environmental Threats
The oceans aren’t as crowded as they used to be now that we’ve depleted stocks of large marine predators through overfishing, pollution and climate change.
The oceans aren’t as crowded as they used to be now that we’ve depleted stocks of large marine predators through overfishing, pollution and climate change.
Dear EarthTalk: How have polar bear populations in the Arctic been faring since the U.S. put them on its endangered species list in 2008, and what efforts are underway to protect them? —Melissa Underhill, Bangor, MER Biologists estimate that as many as 25,000 polar bears […]
Dear EarthTalk: What is being done to safeguard grizzly bears now? I heard that their numbers are dwindling and they could vanish from the Lower 48 if we don’t protect them. —Jim Meth, Akron, OH Before European colonization of North America, upwards of 50,000 grizzly bears—also known as brown bears—roamed free across what is now […]