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The habitable planet. Unit 4, Ecosystems /

Why are there so many living organisms on Earth, and so many different species? How do the characteristics of the nonliving environment, such as soil quality and water salinity, help determine which organisms thrive in particular areas? These questions are central to the study of ecosystems--communi...

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Bibliographic Details
Other Authors: Griswold, Alex (Producer), Lewicke, Anna (Narrator)
Format: Video
Language:English
Language Notes:In English.
Published: District of Columbia : Annenberg Learner, 2007.
Series:Academic Video Online
Subjects:
Ecology.
Biotic communities.
Rain forests.
Coexistence of species.
Earth (Planet)
Forêts pluviales.
Coexistence des espèces.
Terre.
Educational films.
Environmental films.
Films éducatifs.
Films environnementaux.
Online Access:Connect to this streaming video (Alexander Street Press)
Description
Summary:Why are there so many living organisms on Earth, and so many different species? How do the characteristics of the nonliving environment, such as soil quality and water salinity, help determine which organisms thrive in particular areas? These questions are central to the study of ecosystems--communities of living organisms in particular places and the chemical and physical factors that influence them. Learn how scientists study ecosystems to predict how they may change over time and respond to human impacts.
Item Description:Title from resource description page (viewed August 14, 2018).
Physical Description:1 online resource (29 min.)
Playing Time:00:28:12