Long-term spatiotemporal genetic structure of an accidental parasitoid introduction, and local changes in prevalence of its associated Wolbachia symbiont

Show full item record



Permalink

http://hdl.handle.net/10138/335975

Citation

Duplouy , A , Nair , A , Nyman , T & van Nouhuys , S 2021 , ' Long-term spatiotemporal genetic structure of an accidental parasitoid introduction, and local changes in prevalence of its associated Wolbachia symbiont ' , Molecular Ecology , vol. 30 , no. 18 , pp. 4368-4380 . https://doi.org/10.1111/mec.16065 , https://doi.org/10.22541/au.161653029.98016558/v1

Title: Long-term spatiotemporal genetic structure of an accidental parasitoid introduction, and local changes in prevalence of its associated Wolbachia symbiont
Author: Duplouy, Anne; Nair, Abhilash; Nyman, Toshka; van Nouhuys, Saskya
Contributor: University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Helsinki Institute of Life Science HiLIFE
University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Ecology and Evolutionary Biology
Date: 2021-09
Language: eng
Number of pages: 13
Belongs to series: Molecular Ecology
ISSN: 0962-1083
URI: http://hdl.handle.net/10138/335975
Abstract: Population bottlenecks associated with founder events strongly impact the establishment and genetic makeup of populations. In addition to their genotype, founding individuals also bring along symbionts that can manipulate the phenotype of their host, affecting the host population establishment, dynamics and evolution. Thus, to understand introduction, invasion, and spread, we should identify the roles played by accompanying symbionts. In 1991, the parasitoid wasp, Hyposoter horticola, and its associated hyperparasitoid were accidentally introduced from the main Åland islands, Finland, to an isolated island in the archipelago, along with their host, the Glanville fritillary butterfly. Though the receiving island was unoccupied, the butterfly was present on some of the small islands in the vicinity. The three species have persisted as small populations ever since. A strain of the endosymbiotic bacterium Wolbachia has an intermediate prevalence in the H. horticola across the main Åland population. The infection increases susceptibility of the parasitoid to hyperparasitism. We investigated the establishment and spread of the parasitoid, along with patterns of prevalence of its symbiont using 323 specimens collected between 1992 and 2013, from five localities across Åland, including the source and introduced populations. Using 14 microsatellites and one mitochondrial marker, we suggest that the relatively diverse founding population and occasional migration between islands might have facilitated the persistence of all isolated populations, despite multiple local population crashes. We also show local near-fixation of Wolbachia, where the hyperparasitoid is absent, and selection against infected wasp genotypes is relaxed.
Subject: endosymbiosis
gene flow
genotyping
Melitaea cinxia
Mesochorus stigmaticus
trophic chain
HABITAT FRAGMENTATION
MITOCHONDRIAL-DNA
SPATIAL DYNAMICS
POPULATION
DIVERSITY
SYSTEM
METAPOPULATION
COEVOLUTION
COMPLEXITY
PROTECTION
1181 Ecology, evolutionary biology
1182 Biochemistry, cell and molecular biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Wolbachia.pdf 820.6Kb PDF View/Open
mec.16065.pdf 820.6Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record