Effect of spatial connectivity on host resistance in a highly fragmented natural pathosystem

Autor: Anna-Liisa Laine, Jukka Sirén, Layla Höckerstedt
Přispěvatelé: Research Centre for Ecological Change, Organismal and Evolutionary Biology Research Programme, Plant Biology, Faculty of Biological and Environmental Sciences, Ecology and Evolutionary Biology, Viikki Plant Science Centre (ViPS), Doctoral Programme in Plant Sciences, Doctoral Programme in Wildlife Biology, University of Helsinki, Department of Computer Science, Aalto-yliopisto, Aalto University
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
0301 basic medicine
Epidemiology
Local adaptation
Antagonistic Coevolution
Allopatric speciation
DIVERSITY
Metapopulation
MALADAPTATION
Biology
migration
Polymorphism
Single Nucleotide
010603 evolutionary biology
01 natural sciences
03 medical and health sciences
Pathosystem
Evolutionary arms race
Ascomycota
natural populations
LOCAL ADAPTATION
host-pathogen interactions
DNA
Fungal
Plantago
PARASITE COEVOLUTION
Migration
Ecology
Evolution
Behavior and Systematics
Demography
Plant Diseases
ta113
Experimental evolution
Host-pathogen interactions
Research Papers
Natural populations
EVOLUTION
INFECTIOUS-DISEASE DYNAMICS
030104 developmental biology
Evolutionary biology
Sympatric speciation
FOR-GENE COEVOLUTION
coevolution
1181 Ecology
evolutionary biology
PATTERNS
POPULATIONS
epidemiology
PLANT-PATHOGEN METAPOPULATION
Research Paper
host–pathogen interactions
Coevolution
Zdroj: Journal of Evolutionary Biology
Popis: Both theory and experimental evolution studies predict migration to influence the outcome of antagonistic coevolution between hosts and their parasites, with higher migration rates leading to increased diversity and evolutionary potential. Migration rates are expected to vary in spatially structured natural pathosystems, yet how spatial structure generates variation in coevolutionary trajectories across populations occupying the same landscape has not been tested. Here, we studied the effect of spatial connectivity on host evolutionary potential in a natural pathosystem characterized by a stable Plantago lanceolata host network and a highly dynamic Podosphaera plantaginis parasite metapopulation. We designed a large inoculation experiment to test resistance of five isolated and five well-connected host populations against sympatric and allopatric pathogen strains, over 4 years. Contrary to our expectations, we did not find consistently higher resistance against sympatric pathogen strains in the well-connectedpopulations. Instead, host local adaptation varied considerably among populations and through time with greater fluctuations observed in the well-connected populations. Jointly, our results suggest that in populations where pathogens have successfully established, they have the upper hand in the coevolutionary arms race, but hosts may be better able to respond to pathogen-imposed selection in the well-connected than in the isolated populations. Hence, the ongoing and extensive fragmentation of natural habitats may increase vulnerability to diseases.
Databáze: OpenAIRE
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