Aim: Niche theory proposes that increases in species richness along an environmental gradient are associated with a packing of species inside the niche space or an expansion of the niche space. We ...

This is a preview. Log in through your library . Abstract Premise of research. Recently diverged taxa may not exhibit strong morphological or DNA sequence differences, making evaluating species ...

If current extinction trends continue, global shark populations will lose much of their variety, thereby threatening ...

Nine flower species and three insect species that are designated state species may be at risk of extinction by the 2080s because of the effects of climate change, researchers have found. Two-thirds of ...

Sado Island, Japan, is inhabited by seven species of snakes, the largest number in any isolated island in Japan, except for the subtropical Ryukyu Archipelago. Researchers conducted a 5-year field ...

When Veronica Bowers' nonprofit agency gets a cash donation, she asks herself a very basic question: What is it worth in terms of bugs, worms and other wiggly little creatures? "That's how we look at ...

The rain might make us all a bit miserable, but it can have catastrophic influences on relationships—between birds. A small species of bird known as the Seychelles warbler, which live exclusively on ...