The open bar is closed: restructuration of a native parasitoid community following successful control of an invasive pest

David Muru,Elodie Vercken,Madalina I Viciriuc,Nicolas Borowiec,Nicolas Ris,Marcel Thaon,Sylvie Warot

doi:10.24072/pcjournal.43

Abstract

The open bar is closed: restructuration of a native parasitoid community following successful control of an invasive pest

Highlights

Biological invasions are defined as the introduction, establishment and expansion of populations outside of their native area
Our work highlights the restructuration of native parasitoid communities following the successful control of Dryocosmus kuriphilus by the biological control agent Torymus sinensis
The nine native parasitoids that appeared to use D. kuriphilus as a trophic subsidy in our survey are related to oak gall wasps, their degree of generalism is highly variable (Table 2)

Summary

Introduction

Biological invasions are defined as the introduction, establishment and expansion of populations outside of their native area. Invasions are known to have a diversity of direct and indirect negative effects on native ecosystems (see McGeoch et al 2015 for a review of environmental impacts caused by invasion). Mallon et al (2017) have recently reported a permanent niche displacement of native species caused by a failed invasion by Escherichia coli in soil microcosms, and referred to it as a “legacy effect”. Such lasting effects of transient invasions on species niche breadth and space for instance, may as well occur at the community level, impacting overall community structure by forcing species to modify the way they exploit available resources. Empirical data on the response of native community dynamics to transient invasion remain scarce, as there is a lack of studies exploring multi-year community dynamics during the rise and fall of an invasive pest

Methods

Results

Conclusion