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

19 minutes 27 seconds

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Videos are generally available for preview to non-members as short clips. Limited full-length titles are also available. Log In to view the full length title.

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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.

Media Details

Runtime: 19 minutes 27 seconds

Topic: Science
Subtopic: Biology, Ecology, Science Experiments, Science Methods
Grade/Interest Level: 9 - 12
Standards:

Release Year: 2016
Producer/Distributor: Howard Hughes Medical Institute
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Lights and gauges with display screens cover the walls. Illustration of energetic reaction drawn on top. Caption: it releases a lot of energy in the form of heat.

A butterfly sits on a metal head. Caption: can see regular color images and near infrared.

A self healing reverse filter. On screen text, 1 centimeter. 1 time real time, 7 to 3 ratio, D I water to glycerol, 0.0083 M S D S. Caption: and it self heals after the object passes.

A 360 view of the clouds and the tree tops. Caption: Clouds play a pivotal role in our planet's climate,

The illustration depicts the distress signals sent by the plant, when the caterpillar munches on its leaves. On screen text, Larva, Pieris rapae. Caption: Here's a caterpillar munching through a leaf.

A graphical illustration of a star. Caption: reveal the inner workings of these rare stars,

A group of people visiting an active volcano. Caption: scientists visited New Zealand's topol volcanic zone,

A man with a shovel standing besides a water body. Caption: The team wants to see what other pollutants are recorded.

Illustrations depict a cell placed above the graphene, which is illuminated by a light bulb. Caption: The more intense the light, the faster the cells beat.

A biological skin and a bioinspired e skin. The e skin consists of synthetic layers instead of biological layers. Caption: work together to give our hands their extraordinary sensitivity.