For example, the predators of a scorpion in a desert ecosystem might be a golden eagle, an owl, a roadrunner, or a fox. Figure 1: A simple six-member food web for a representative desert grassland.

The Mojave Desert Land Trust is working to scout, catalogue, collect and preserve millions of seeds from 250 species and counting in a race to save an ecosystem.

A variety of ecosystems are spread across the world, each with distinctive interacting characteristics and components. They range from small (eg a freshwater pond) to global (eg the desert biome ...