Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The invasion and coexistence of competing Wolbachia strains
AU - Keeling, Matt J.
AU - Jiggins, F. M.
AU - Read, Jonathan M.
PY - 2003/10
Y1 - 2003/10
N2 - Cytoplasmic incompatibility between arthropods infected with different strains of Wolbachia has been proposed as an important mechanism for speciation. However, a basic requirement for this mechanism is the coexistence of different strains in neighbouring populations. Here we test whether this required coexistence is possible in a spatial context. Continuous-time models for the behaviour of one and two strains of Wolbachia within a single well-mixed population demonstrate the Allee effect and founder control, such that one strain is always driven extinct. In contrast, discretised spatial models show patchy persistence of the two strains although coexistence within the same habitat is rare. A simplified model of such founder control suggests that it is fragmentation of (or barriers within) the habitat rather than space itself that leads to persistence.
AB - Cytoplasmic incompatibility between arthropods infected with different strains of Wolbachia has been proposed as an important mechanism for speciation. However, a basic requirement for this mechanism is the coexistence of different strains in neighbouring populations. Here we test whether this required coexistence is possible in a spatial context. Continuous-time models for the behaviour of one and two strains of Wolbachia within a single well-mixed population demonstrate the Allee effect and founder control, such that one strain is always driven extinct. In contrast, discretised spatial models show patchy persistence of the two strains although coexistence within the same habitat is rare. A simplified model of such founder control suggests that it is fragmentation of (or barriers within) the habitat rather than space itself that leads to persistence.
KW - Wolbachia
KW - cytoplasmic incompatibility
KW - speciation
KW - spatial structure
KW - CULEX-PIPIENS L
KW - CYTOPLASMIC INCOMPATIBILITY
KW - DROSOPHILA-SIMULANS
KW - REPRODUCTIVE ISOLATION
KW - NATURAL-POPULATIONS
KW - GENETIC-DIVERGENCE
KW - DYNAMICS
KW - SPECIATION
KW - MODELS
KW - INHERITANCE
U2 - 10.1038/sj.hdy.6800343
DO - 10.1038/sj.hdy.6800343
M3 - Journal article
VL - 91
SP - 382
EP - 388
JO - Heredity
JF - Heredity
SN - 0018-067X
IS - 4
ER -