Bio 160 - Avery

5/3/00


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Table of Contents

Bio 160 - Avery

I. Food Webs - community portraits

C. What is misleading about using similar lines?

2. Interaction Strengths (Pain 1980)

Examples:

Steelhead and roach - Eel River (Power 1990)

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Littorina and algae (Jane Lubchenko 1978)

Littorina and algae (Jane Lubchenko 1978)

Birds on Bilberry bushes in Sweden (Ola Atlegrim 1989)

II. Keystone species

A. Definition:

B. Examples:

B. Examples:

B. Examples:

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B. Examples:

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B. Examples continued:

C. The perils of introduced species

b. Local examples

Author: William E. Avery

Email: averyw@csus.edu

Home Page: http://www.csus.edu/indiv/a/averyw/bio160/lectures3.htm