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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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The Ratio Dependence Controversy

The Ratio Dependence Controversy

(p.115) Chapter 5 The Ratio Dependence Controversy
How Species Interact

Roger Arditi

Lev R. Ginzburg

Oxford University Press

This chapter examines the controversy surrounding the topic of ratio-dependence model of predator-prey interactions. It considers the practice of many ecologists in using the Lotka-Volterra model and other similar prey-dependent models when building complex food web models, either for theoretical purposes or for applied studies. It looks into the issue of concealing evidence of ratio dependence in collected works, and highlights the continuing acceptance of prey-dependent views with the paradox of enrichment and the cascading response of trophic chains. It tackles some of the arguments raised against ratio-dependency such as the theory's lack of a mechanical basis, and discusses the agreement of a “middle opinion” that predator dependence has to be included in the theory of predator-prey interactions.

Keywords:   ratio-dependence model, predator-dependence model, predatory-prey interactions, Lotka-Volterra model, food web, paradox of enrichment, cascading response, trophic chains

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