Keystone species and trophic cascades

Keystone species and trophic cascades

By Angela West

First we need to understand a few vocabulary terms : species, individual, population, community, ecosystem, biome, biosphere

A species is a group of organisms that are similar and can interbreed. For example, there are different types (species) of birds.

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​Species

Multiple Choice

A coral reef is an example of a

• population

• community

• ecosystem

• biome

Multiple Choice

A murder of crows is a/an

• population

• community

• ecosystem

• biome

Indirect actions that can control entire ecosystems

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​Trophic cascades: