Some Animals Are More Equal Than Others: Keystone Species And Trophic Cascades

Large fish with a spotted upper body and white underbelly swimming open-mouthed into a school of smaller fish. Caption: Each community is populated by different species.

What determines how many species live in a given place? Or how many individuals of the species can live somewhere? The research that provided answers to these questions was set in motion by the key experiments of ecologists Robert Paine and James Estes. Their research demonstrates just how fundamental keystone species and trophic cascades are in understanding ecology.

(Source: DCMP)

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  • Some Animals Are More Equal Than Others: Keystone Species And Trophic Cascades

    Type:
    Video
    Format:
    Streaming
    Accommodations:
    English Audio Descriptions - Visual, English Captions - Auditory
    Languages:
    English
    License:
    OER
    Author:
    Howard Hughes Medical Institute
    Length:
    20 minutes