What is an ecosystem? Learn how living and non-living components interact through energy flow, nutrient cycles, food webs and ecological processes.
An ecosystem connects living organisms with their physical environment through energy flow, nutrient cycling, food webs, feedbacks and disturbance.
A keystone species can reshape an ecosystem despite low abundance. Learn how keystones work, how scientists identify them and why they matter.
The role of predators in ecosystems includes shaping prey, food webs, scavenger communities and, in some cases, vegetation and habitats.
