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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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Alternative Theories of Trophic Interaction

Alternative Theories of Trophic Interaction

Chapter:
(p.8) Chapter 1 Alternative Theories of Trophic Interaction
Source:
How Species Interact
Author(s):

Roger Arditi

Lev R. Ginzburg

Publisher:
Oxford University Press
DOI:10.1093/acprof:osobl/9780199913831.003.0002

This chapter discusses the alternative ways to interpret elemental trophic interactions mathematically. It outlines the prey-dependent models, predator-dependent models, and ratio-dependent models used in the entire text. It focuses first on the Monod and Contois equation of growth and compares both approaches in describing the growth rate of bacteria as a function of sugar concentration. It then considers the Arditi-Ginzburg ratio dependent functional response which argues that the predation, reproduction, and mortality are truly continuous processes and are operating on the same timescale in a perfectly mixed environment. The chapter also proposes the gradual interference model, and highlights that the conversion of prey biomass is one requirement that predator-prey models must obey.

Keywords:   elemental trophic interactions, prey-dependent models, predator-dependent models, ratio-dependent models, equation of growth, Arditi-Ginzburg ratio, predation, gradual interference

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