Citation

Food web complexity and community dynamics

Gary A. Polis, Donald R. Strong

The American Naturalist (1996)

TL;DR

Real food webs are networks, not discrete trophic levels

This critical review challenges the notion that ecosystems are neatly organized into discrete trophic levels. Real food webs are continuous networks with omnivores feeding at multiple levels, complex indirect interactions, and keystone species whose effects span modular boundaries.

This paper supports the chapter's important caveat that modularity represents an analytical tool for managing complexity, but real systems rarely exhibit perfect modularity. The value lies in understanding where modular thinking helps and where integration and network effects dominate - a lesson directly applicable to organizational design.

Key Findings from Polis & Strong (1996)

  • Real food webs are networks, not discrete trophic levels
  • Omnivores feed at multiple levels
  • Keystone species have impacts spanning modular boundaries
  • Modular trophic structure is a pedagogical simplification

Related Mechanisms for Food web complexity and community dynamics

Related Organisms for Food web complexity and community dynamics

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