Some animals matter so much to their ecosystems that losing them is like removing the keystone from an arch—the entire ...

Ecologists have long understood that the diversity of an ecosystem is at the heart of its stability. A groundbreaking discovery in the 1960s took it a step further and changed the way scientists ...

Beavers, earthworms, prairie dogs, elephants, and more don't just live in ecosystems, they reshape them to the benefit of ...

The reemergence of a keystone species sparked joy among scientists, ecologists, and biologists. The Santa Cruz kangaroo rat — a rodent related to chipmunks — used to be plentiful in the Santa Cruz, ...

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. The Chronicle's Sunday (Nov. 11) editorial, "Will prairie dog be next anti-ESA poster child?" was ...

Also known as the eboe, choibá, tonka bean or almendro, Dipteryx oleifera is native to Honduras, Nicaragua, Costa Rica, Panama, Colombia, and Ecuador. Its hard wood is used in construction, and it ...

Indicator species are often the first to be affected by change in an ecosystem. Studying these sensitive animals helps scientists detect the effects of climate change and pollution early. Variable ...

KEYSTONE - Animal-control officers seized 28 tigers, lions and other big cats Monday afternoon after caretakers reported that the owner wasn't providing for the animals' proper care. Deb Sullivan, ...