Article: Missing the link: the importance of keeping ecosystems intact and what the Endangered Species Act suggests we do about it.

 
  I. INTRODUCTION 
 II. BACKGROUND 
 A. Listing Species Under the ESA 
 B. Defining "Species" to Include "Distinct Population Segments" 
 C. The DPS Policy 
III. SPECIES INTERACTIVITY AND ECOSYSTEM FUNCTIONING 
 A. While You Were Sleeping 
 B. Waking Up: Scientists Are Analyzing These Data and Providing 
Good Food for Policy 
1. Keystone Species 
   a. Top Predators 
   b. Ecosystem Engineers 
   c. Competitors and Facilitators 
2. Species Interactivity on a Continuum 
 IV. THE DPS POLICY MUST BE CHANGED TO CONSIDER A POPULATION'S 
 SIGNIFICANCE TO ITS ECOSYSTEM 
 A. Individual Ecosystem Survival: Why ...

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