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How Species InteractAltering the Standard View on Trophic Ecology$
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Roger Arditi and Lev Ginzburg

Print publication date: 2012

Print ISBN-13: 9780199913831

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199913831.001.0001

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Indirect Evidence

Indirect Evidence

Food Chain Equilibria

(p.62) Chapter 3 Indirect Evidence
How Species Interact

Roger Arditi

Lev R. Ginzburg

Oxford University Press

This chapter considers the theoretical equilibrium consequences of ratio-dependent and prey-dependent views and compares them with evidence from nature. It provides evidence, mostly from lakes and marine systems, regarding the responses of food chains to enrichment. It discusses a number of theoretical observations such as the trophic cascade pattern. It also looks into how food webs based on donor control, a case of ratio dependence, are shown to be much more stable than those based on the Lotka-Volterra model, and explains the persistence of complex food webs in nature.

Keywords:   theoretical equilibrium, ratio-dependent, prey-dependent, food chains, trophic cascade, food webs, donor control, Lotka-Volterra model, enrichment

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