Wildlife

Maritime Noise Pollution

Underwater noise created by shipping and recreational boats is making it more difficult for dolphins to talk to each other, according to a new study.

University of Maryland researchers say the complex whistle calls used by the marine mammals are becoming simplified to make sure they can be understood through the din of maritime traffic.

“It’s kind of like trying to answer a question in a noisy bar and after repeated attempts to be heard, you just give the shortest answer possible,” said marine biologist Helen Bailey. She and colleagues made the discovery by analyzing recordings from microphones on the bottom of the Atlantic.

An earlier Japanese study found that humpback whales stop singing or reduce their songs when near loud noise from passing ships.

Mass Extinction

Earth’s wild animal population has plunged 60 percent since 1970, and the rate of extinction is now 100 to 1,000 times higher due to pressure from human activities, a new report warns.

The World Wildlife Fund’s (WWF) latest Living Planet Index says the global biodiversity needs “life support,” and called on heads of state to step up and fight for the planet.

The group says tackling climate change by advancing renewable energy and boosting environmentally friendly food production would begin taking the pressure off the world’s wildlife.