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Nøkkelart

En nøkkelart er en art, typisk et dyr eller en plante, som har stor effekt på sitt leveområde. Nøkkelarter er for eksempel store rovdyr som ulv eller havoter, som regulerer bestandene av sine byttedyr.

Nøkkelarter inkluderer også «ingeniører» som bever eller elefanter, som drastisk påvirker miljøet og dermed skaper habitat som helt forsvinner dersom nøkkelarten selv forsvinner.

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