Prevalence and population genetic analyses of parasites in invasive Vespa velutina and native Hymenoptera
Year: 2024
Type: article
Abstract: • Prevalences depended on the parasite family, the location, the season and the host. • V. velutina displayed significantly less parasite occurrence than local Hymenoptera. • Parasites showed significant geographic differentiation at the molecular level. • No genetic differentiation was observed across hosts. • V. velutina did not introduce new parasites into the invaded territories. Invasive species pose a threat to the ecological balance of the ecosystems they invade by altering local host-pathogen dynamics. To investigate these relationships and their potential consequences, we examined the prevalence and genetic diversity patterns of Trypanosomatidae, Lipotrophidae, and Nosematidae in a collection of sympatric isolates of the invasive hornet Vespa velutina and local Hymenoptera from two recently colonized areas: Europe and South Korea. Data were gathered through PCR amplification and massive parallel sequencing, and analyses were conducted using population genetics tools. Parasite prevalences showed substantial variation depending on (i) the parasite family (Trypanosomatidae and Nosematidae were the most and less prevalent, respectively), (ii) location (e.g. Galicia displayed the highest pooled values), (iii) the season (highest in spring for Trypanosomatidae and Lipotrophidae), and (iv) the host. V. velutina exhibited significantly lower parasite occurrence than native Hymenoptera across all parasite families (consistent with the enemy release hypothesis), although this difference was less pronounced during the periods of heightened predatory activity, suggestive of trophic transmission. Parasite species displayed significant genetic differentiation between European and South Korean isolates, yet no differentiation was observed across hosts, suggesting that all Hymenoptera are exposed to a common local pathogen population. There was no indication that V. velutina acted as a carrier of foreign parasites to the invaded territories.
Institutions: Universidade de Santiago de Compostela, Center for Research in Molecular Medicine and Chronic Diseases, Instituto de Investigación Sanitaria de Santiago, University of Trás-os-Montes and Alto Douro, Instituto Nacional de Investigação Agrária e Veterinária, Centro de Investigação e de Tecnologias Agro-Ambientais e Biologicas, NEIKER, Basque Institute for Agricultural Research and Development, Centre National de la Recherche Scientifique, Centre d'Etudes Biologiques de Chizé, La Rochelle Université, Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement, Santé et Agroécologie du Vignoble, Government of Jersey, Kyungpook National University, Fundación Pública Galega de Medicina Xenómica, Servicio Gallego de Salud
Language: English
Subfield: Genetics
Domain: Life Sciences
SDG: Life on land
Open Access status: hybrid
Estimated APC paid: $3,220
OpenAlex ID: W4402700994