Ecosystem responses to global change are often nonlinear. Ecological thresholds are tipping points beyond which small changes in environmental conditions can have disproportionate effects on ...

In Yellowstone National Park — where gray wolves were reintroduced starting in 1995 — researchers have gone back and forth on whether the restoration of wolves has impacted the ecosystem. The idea is ...

Capelin are a major forage fish species in high-latitude marine ecosystems. Recent heatwaves in Alaska led to a dramatic decline in capelin abundance, which can have major impacts on predators, ...