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      The northernmost record of the Asian hornet Vespa velutina nigrithorax (Hymenoptera, Vespidae)

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      Journal: Evolutionary Systematics
      Publisher: Pensoft Publishers

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          Abstract

          For the first time the Asian hornet Vespa velutina has been found in Hamburg (Northern Germany). So far this is the northernmost occurrence of this originally SE-Asian species in Europe and in the world. It remains unclear whether this is a single accidentally translocated specimen or one of a population already reproducing. The find may suggest that the species will possibly spread much faster than previously anticipated and modelled.

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          Can species distribution models really predict the expansion of invasive species?

          Morgane Barbet-Massin, Quentin Rome, Claire Villemant … (2018)
          Predictive studies are of paramount importance for biological invasions, one of the biggest threats for biodiversity. To help and better prioritize management strategies, species distribution models (SDMs) are often used to predict the potential invasive range of introduced species. Yet, SDMs have been regularly criticized, due to several strong limitations, such as violating the equilibrium assumption during the invasion process. Unfortunately, validation studies–with independent data–are too scarce to assess the predictive accuracy of SDMs in invasion biology. Yet, biological invasions allow to test SDMs usefulness, by retrospectively assessing whether they would have accurately predicted the latest ranges of invasion. Here, we assess the predictive accuracy of SDMs in predicting the expansion of invasive species. We used temporal occurrence data for the Asian hornet Vespa velutina nigrithorax, a species native to China that is invading Europe with a very fast rate. Specifically, we compared occurrence data from the last stage of invasion (independent validation points) to the climate suitability distribution predicted from models calibrated with data from the early stage of invasion. Despite the invasive species not being at equilibrium yet, the predicted climate suitability of validation points was high. SDMs can thus adequately predict the spread of V. v. nigrithorax, which appears to be—at least partially–climatically driven. In the case of V. v. nigrithorax, SDMs predictive accuracy was slightly but significantly better when models were calibrated with invasive data only, excluding native data. Although more validation studies for other invasion cases are needed to generalize our results, our findings are an important step towards validating the use of SDMs in invasion biology.
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            Predicting the invasion risk by the alien bee-hawking Yellow-legged hornet Vespa velutina nigrithorax across Europe and other continents with niche models

            Adrien Perrard, Olivier Gargominy, Frédéric Jiguet … (2011)
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              The invasion, provenance and diversity of Vespa velutina Lepeletier (Hymenoptera: Vespidae) in Great Britain

              Giles E. Budge, Jennifer Hodgetts, Eleanor Jones … (2017)
              The yellow-legged or Asian hornet (Vespa velutina colour form nigrithorax) was introduced into France from China over a decade ago. Vespa velutina has since spread rapidly across Europe, facilitated by suitable climatic conditions and the ability of a single nest to disperse many mated queens over a large area. Yellow-legged hornets are a major concern because of the potential impact they have on populations of many beneficial pollinators, most notably the western honey bee (Apis mellifera), which shows no effective defensive behaviours against this exotic predator. Here, we present the first report of this species in Great Britain. Actively foraging hornets were detected at two locations, the first around a single nest in Gloucestershire, and the second a single hornet trapped 54 km away in Somerset. The foraging activity observed in Gloucestershire was largely restricted to within 700 m of a single nest, suggesting highly localised movements. Genetic analyses of individuals from the Gloucestershire nest and the single hornet from Somerset suggest that these incursions represent an expansion of the European population, rather than a second incursion from Asia. The founding queen of the Gloucestershire nest mated with a single male, suggesting that sexual reproduction may have occurred in an area of low nest density. Whilst the nest contained diploid adult males, haploid ‘true’ males were only present at the egg stage, indicating that the nest was detected and removed before the production of queens. Members of the public reported additional dead hornets associated with camping equipment recently returned from France and imported timber products, highlighting possible pathways of incursion. The utility of microsatellites to inform surveillance during an incursion and the challenge of achieving eradication of this damaging pest are discussed.
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                Author and article information

                Journal
                Title: Evolutionary Systematics
                Abbreviated Title: EvolSyst
                Publisher: Pensoft Publishers
                ISSN (Electronic): 2535-0730
                Publication date Created: February 04 2020
                Publication date (Electronic): February 04 2020
                Volume: 4
                Issue: 1
                Pages: 1-4
                Article
                DOI: 10.3897/evolsyst.4.47358
                SO-VID: 8945eb9e-a90c-4714-9e17-44eb05aefd4d
                Copyright © © 2020
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                http://creativecommons.org/licenses/by/4.0/

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