Ecosystems

Ecosystems

Tiger sharks helped discover the world’s largest seagrass prairie

Instrument-equipped sharks went where divers couldn’t to survey the Bahama Banks seagrass ecosystem.

Oceans

Sharks face rising odds of extinction even as other big fish populations recover

Over the last 70 years, large ocean fishes like tuna and marlin have been recovering from overfishing. But sharks continue to decline toward extinction.

Environment

Heat waves in U.S. rivers are on the rise. Here’s why that’s a problem

In recent years, heat waves in U.S. rivers have gotten more frequent, causing trouble for fish, plants and water quality.

Animals

Tree-climbing carnivores called fishers are back in Washington’s forests

Thanks to a 14-year reintroduction effort, fishers, or “tree wolverines,” are once again climbing and hunting in Washington’s forests after fur trapping and habitat loss wiped them out.

Ecosystems

‘Fen, Bog & Swamp’ reminds readers why peatlands matter

In her latest book, author Annie Proulx chronicles people’s long history with peatlands and examines the ecological value of these overlooked places.

Ecosystems

A Caribbean island gets everyone involved in protecting beloved species

Scientists on Saba are introducing island residents to conservation of Caribbean orchids, red-billed tropicbirds and urchins.

Climate

How Kenyans help themselves and the planet by saving mangrove trees

Communities in Kenya took action to restore their coastal mangrove forests, reaping economic and environmental benefits. Others are following suit.

Environment

Electrical bacteria may help clean oil spills and curb methane emissions

Cable bacteria are living electrical wires that may become a tool to reduce methane emissions and clean oil spills.

Animals

Tardigrades could teach us how to handle the rigors of space travel

Tardigrades can withstand X-rays, freezing and vacuum. Now researchers are learning how they do it, with an eye toward human space travel.

Environment

Earth’s oldest known wildfires raged 430 million years ago

430-million-year-old fossilized charcoal suggests atmospheric oxygen levels of at least 16 percent, the amount needed for fire to take hold and spread.

Animals

These tiny marsupials survived wildfires only to face extinction from feral cats

The Kangaroo Island dunnart was one species seen to reemerge after 2019–2020 Australian bushfires but is now closer than ever to extinction.

Ecosystems

Some polar bears in Greenland survive on surprisingly little sea ice

“Glacial mélange” could provide a last refuge for some bears as the Earth warms, but climate action is needed to preserve the species, researchers say.