Previous research on the effect of wolves on the food web has been criticized, raising questions about the predator’s role in the Yellowstone ecosystem.

Fish rarely feed their young. An exception are certain species of snakeheads whose offspring feed on trophic eggs provided by their parent. A new study shows that this exceptional adaptation developed ...

Predators typically are larger than their prey, and consequently, trophic level should increase with body size. Whereas this relationship has helped in developing predictions about food web structure ...

The density of organisms declines with size, because larger organisms need more energy than smaller ones and energetic losses occur when larger organisms feed on smaller ones. A potential expression ...