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Parasitism and Ecosystems$
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Frédéric Thomas, François Renaud, and Jean-François Guegan

Print publication date: 2005

Print ISBN-13: 9780198529873

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198529873.001.0001

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Subverting hosts and diverting ecosystems: an evolutionary modelling perspective

Subverting hosts and diverting ecosystems: an evolutionary modelling perspective

Chapter:
(p.140) CHAPTER 9 Subverting hosts and diverting ecosystems: an evolutionary modelling perspective
Source:
Parasitism and Ecosystems
Author(s):

Sam P. Brown

Jean-Baptiste André

Jean-Baptiste Ferdy

Bernard Godelle

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198529873.003.0010

This chapter argues that parasite-induced changes in host phenotypes can have a dramatic impact on the community structure of their free-living hosts. It begins with a review of host-manipulation literature, illustrating how parasites can modify their host phenotypes in dramatic ways. It then considers two generic examples of host manipulation: parasite-induced susceptibility to predation (PISP) and parasite-induced castration (PIC), and develops simple population-dynamical models of the consequences of PISP and PIC on communities (host plus two predators for PISP, host plus competitor for PIC). Finally, the chapter highlights how the simple model results are likely to have parallels in a range of empirical systems, offering an agenda for future theoretical and empirical research.

Keywords:   parasite manipulation, ecosystem structure, ecological niches, community ecology, transmission mode

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