10.5061/DRYAD.26PM4
Hesse, Elze
University of Exeter
Best, Alex
University of Sheffield
Boots, Michael
University of Exeter
Hall, Alex R.
ETH Zürich Zürich Switzerland
Buckling, Angus
University of Exeter
Data from: Spatial heterogeneity lowers rather than increases
host-parasite specialization
Dryad
dataset
2015
Host-parasite interaction
Viruses
Pseudomonas fluorescens
Microbes
2015-06-29T15:11:00Z
2015-06-29T15:11:00Z
en
https://doi.org/10.1111/jeb.12689
199838 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Abiotic environmental heterogeneity can promote the evolution of diverse
resource specialists, which in turn may increase the degree of
host-parasite specialization. We coevolved Pseudomonas fluorescens and
lytic phage ϕ2 in spatially structured populations, each consisting of two
interconnected subpopulations evolving in the same or different nutrient
media (homogeneous and heterogeneous environments, respectively). Counter
to the normal expectation, host-parasite specialization was significantly
lower in heterogeneous compared with homogeneous environments. This result
could not be explained by dispersal homogenizing populations, as this
would have resulted in the heterogeneous treatments having levels of
specialization equal to or greater than that of the homogeneous
environments. We argue that selection for costly generalists is greatest
when the coevolving species are exposed to diverse environmental
conditions and that this can provide an explanation for our results. A
simple coevolutionary model of this process suggests that this can be a
general mechanism by which environmental heterogeneity can reduce rather
than increase host-parasite specialization.
Host-parasite specializationThis data file contains data on bacterial
resistance in two subpopulations linked by migration. Homogeneous
subpopulations are linked by 1% dispersal (where treatment A gives
dispersal between 0.5-0.5 M9 and B gives dispersal between 5-5 M9).
Hetergeneous populations (0.5-5 M9) are linked by either 1% (C) or 50% (D)
dispersal. For each subpopulation 5 bacterial clones (A1-A5 and B1-B5)
where tested for resistance (1 or 0) against infectivity by 5 phage clones
(A1-A5 and B1-B5) isolated from each subpopulation.Hesse_etal.xlsx