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Chapter Eighteen - When chytrid fungus invades: integrating theory and data to understand disease-induced amphibian declines

from Part III - Understanding wildlife disease ecology at the community and landscape level

Published online by Cambridge University Press:  28 October 2019

By
Mark Q. Wilber ,
Pieter T.J. Johnson  and
Cheryl J. Briggs
Edited by
Kenneth Wilson ,
Andy Fenton  and
Dan Tompkins
Kenneth Wilson
Affiliation:
Lancaster University
Andy Fenton
Affiliation:
University of Liverpool
Dan Tompkins
Affiliation:
Predator Free 2050 Ltd
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Summary

Amphibian populations are experiencing declines globally, many of which are driven by the fungal pathogen Batrachochytrium dendrobatidis (Bd), but different species of amphibians, as well as divergent populations of the same species, can show drastically different responses to Bd invasion. We answer three questions: what are the potential trajectories of amphibian host populations following Bd invasion; how are each of these trajectories influenced by the transmission dynamics and load dynamics governing an amphibian–Bd system; and) how do ecological, evolutionary, and environmental factors affect both Bd transmission and load dynamics, which influence the amphibian hosts’ population levels? We build a general framework that identifies eight population-level trajectories that amphibian populations can take upon Bd invasion that are a result of five different branch points. Each of these branch points is affected by either the transmission dynamics or the load dynamics underlying the system. Integrating relevant disease ecology theory and empirical data, this framework can be used to guide context-dependent management strategies for amphibian populations infected with Bd.

Keywords

chytridiomycosisBatrachochytrium dendrobatidisdisease-induced extinctionwithin-host dynamicstransmission dynamicsresistancetolerance
Type
Chapter
Information
Wildlife Disease Ecology
Linking Theory to Data and Application
 , pp. 511 - 543
Publisher: Cambridge University Press
Print publication year: 2019

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References

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