Disease and the abundance and distribution of bird populations: a summary

Abstract

Over the past few years, I have written several reviews about the effects of infectious diseases upon the distribution and abundance of their host populations. One general review and synthesis is in the fmd chapter of a book whose earlier chapters focus mainly on human diseases (Anderson & May 1991). A bird‐specific discussion, with particular reference to conservation issues, is given by Dobson and May (1991). Broadly related questions about the invasion, persistence and spread of infectious diseases within animal communities are explored by Anderson and May (1986) and with emphasis on bird populations by Dobson and May (1986). Also relevant are a set of papers from the Society for Conservation Biology's first‐ever symposium on Conservation and Disease (for an overview, see May 1988, Scott 1988).Rather than burdening the literature with a recapitulation of these existing reviews, this paper gives a sign‐posted guide for those who are not familiar with this particular literature. I first sketch reasons for believing that infectious diseases play an important part in the life history of birds. Next I point towards an analytic framework for understanding the dynamics of host‐pathogen associations. Finally I list some of the implications for the conservation biology of bird populations.