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Dispersal, host genotype and environment shape the spatial dynamics of a parasite in the wild
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.ORCID iD: 0000-0002-3550-1070
Number of Authors: 4
2017 (English)In: Ecology, ISSN 0012-9658, E-ISSN 1939-9170, Vol. 98, no 10, 2574-2584 p.Article in journal (Refereed) Published
Abstract [en]

Dispersal, environment and genetic variation may all play a role in shaping host-parasite dynamics. Yet, in natural systems, their relative importance remains unresolved. Here, we do so for the epidemiology of a specialist parasite (Erysiphe alphitoides) on the pedunculate oak (Quercus robur). For this purpose, we combine evidence from a multi-year field survey and two dispersal experiments, all conducted at the landscape scale. Patterns detected in the field survey suggest that the parasite is structured as a metapopulation, with trees in denser oak stands characterized by higher parasite occupancy, higher colonization rates and lower extinction rates. The dispersal experiments revealed a major impact of the environment and of host genotype on the presence and abundance of the parasite, with a weaker but detectable imprint of dispersal limitation. Overall, our findings emphasize that dispersal, host genotype and the environment jointly shape the spatial dynamics of a parasite in the wild.

Place, publisher, year, edition, pages
2017. Vol. 98, no 10, 2574-2584 p.
Keyword [en]
colonization, disease dynamics, dispersal, epidemiology, Erysiphe alphitoides, host-parasite interaction, landscape scale, metapopulation, pedunculate oak, powdery mildew, Quercus robur, spatial dynamics
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-147845DOI: 10.1002/ecy.1949ISI: 000412121600009PubMedID: 28718884OAI: oai:DiVA.org:su-147845DiVA: diva2:1153476
Available from: 2017-10-30 Created: 2017-10-30 Last updated: 2017-10-30Bibliographically approved

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