Abstract:
:Parasites with low host specificity (e.g. infecting a large diversity of host species) are of special interest in disease ecology, as they are likely more capable of circumventing ecological or evolutionary barriers to infect new hosts than are specialist parasites. Yet for many parasites, host specificity is not fixed and can vary in response to environmental conditions. Using data on host associations for avian malaria parasites (Apicomplexa: Haemosporida), we develop a hierarchical model that quantifies this environmental dependency by partitioning host specificity variation into region- and parasite-level effects. Parasites were generally phylogenetic host specialists, infecting phylogenetically clustered subsets of available avian hosts. However, the magnitude of this specialisation varied biogeographically, with parasites exhibiting higher host specificity in regions with more pronounced rainfall seasonality and wetter dry seasons. Recognising the environmental dependency of parasite specialisation can provide useful leverage for improving predictions of infection risk in response to global climate change.
journal_name
Ecol Lettjournal_title
Ecology lettersauthors
Fecchio A,Wells K,Bell JA,Tkach VV,Lutz HL,Weckstein JD,Clegg SM,Clark NJdoi
10.1111/ele.13215subject
Has Abstractpub_date
2019-03-01 00:00:00pages
547-557issue
3eissn
1461-023Xissn
1461-0248journal_volume
22pub_type
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