Diversity and Introduction History of Glycaspis brimblecombei Reflects a History of Bridgeheads and Distinct Invasions

Gudrun Dittrich-Schröder; Jeff R Garnas; Daniela Arriagada-Cares; Rodrigo Ahumada; Brett P Hurley; Simon A Lawson; Bernard Slippers

doi:10.3389/ffgc.2021.783603

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Diversity and Introduction History of Glycaspis brimblecombei Reflects a History of Bridgeheads and Distinct Invasions

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Diversity and Introduction History of Glycaspis brimblecombei Reflects a History of Bridgeheads and Distinct Invasions

Gudrun Dittrich-Schröder, Jeff R Garnas, Daniela Arriagada-Cares, Rodrigo Ahumada, Brett P Hurley, Simon A Lawson and Bernard Slippers

Frontiers in Forests and Global Change, Vol.4, pp.1-11

2021

DOI: https://doi.org/10.3389/ffgc.2021.783603

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Abstract

invasion pathways

invasive insect pest

Eucalyptus spp.

population genetics

forest health

Glycaspis brimblecombei is an invasive insect pest of Eucalyptus that has spread rapidly around the world since its first report in California in 1998. The pest now occurs on at least four continents where Eucalyptus is grown as a non-native plantation species. To characterize global routes of invasion for this insect, we characterized the sequences of a portion of the Cytochrome Oxidase 1 (COI) gene from 105 individuals from the invasive and native range, including from Australia, Brazil, Chile, La Réunion, Mauritius, South Africa and the United States. In addition, we developed 13 polymorphic microsatellite markers, of which we used 11 to characterize the diversity in the same 105 specimens. Our results suggest that there have been two independent introduction events from Australia, which is assumed to be the origin, to distinct parts of the adventive range. The first introduction was into the United States, from where it appears to have spread to South America and eventually to South Africa. This finding highlights the threat of bridgehead populations to accelerate pest invasions in Eucalyptus, even if those populations are on widespread non-commercial populations of Eucalyptus (as in California). A second introduction appears to have occurred on the islands of Mauritius and La Réunion and provides another example of the establishment of independent lineages of invasive global insect pests. This complex invasion pattern mirrors that found in other Eucalyptus pests.

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Title: Diversity and Introduction History of Glycaspis brimblecombei Reflects a History of Bridgeheads and Distinct Invasions
Authors: Gudrun Dittrich-Schröder (Author) - University of Pretoria
Jeff R Garnas (Author) - University of Pretoria
Daniela Arriagada-Cares (Author) - University of Pretoria
Rodrigo Ahumada (Author)
Brett P Hurley (Author) - University of Pretoria
Simon A Lawson (Author) - University of the Sunshine Coast, Queensland, Forest Industries Research Centre
Bernard Slippers (Author) - University of Pretoria
Publication details: Frontiers in Forests and Global Change, Vol.4, pp.1-11
Publisher: Frontiers Research Foundation
Date published: 2021
DOI: 10.3389/ffgc.2021.783603
ISSN: 2624-893X
Copyright note: Copyright © 2021 Dittrich-Schröder, Garnas, Arriagada-Cares, Ahumada, Hurley, Lawson and Slippers. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Organisation Unit: University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
Language: English
Record Identifier: 99605107902621
Output Type: Journal article