The decline of native coccinellids (Coleoptera: Coccinellidae) in the United States and Canada

Harmon, Jason P.; Stephens, Erin; Losey, John E.

doi:10.1007/978-1-4020-6047-2_10

Cited by 43 publications

(98 citation statements)

References 39 publications

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“…Prior to the arrival of H. axyridis, it was an extremely common species in Europe. Its status as a native of North America is unclear although it is not a very recent arrival (Krafsur et al, 1996); furthermore, the possible roles of other invasive coccinellids, notably Coccinella septempunctata L., in its decline in North America (Harmon et al, 2007) make discussion of the situation there more complex. I therefore largely restrict my discussion in this paper to European populations of A. bipunctata.…”

Section: Harmonia Axyridismentioning

confidence: 99%

“…The focus of this work has been actual or anticipated declines in native species abundance since the introduction of H. axyridis (e.g., Michaud, 2002;Martins et al, 2009;Adriaens et al, 2010;Roy et al, 2012Roy et al, , 2016Grez et al, 2016), although the detailed picture is complex (Harmon et al, 2007;Bahlai et al, 2015). This focus has been coupled to numerous ex-this amounts to a total budget of €198 million to €266 million per year (Chakir et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Harmonia axyridis (Coleoptera: Coccinellidae): Smelling the rat in native ladybird declines

Sloggett¹

2017

Eur. J. Entomol.

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Section: Harmonia Axyridismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Harmonia axyridis (Coleoptera: Coccinellidae): Smelling the rat in native ladybird declines

Sloggett¹

2017

Eur. J. Entomol.

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“…On the other hand, ladybirds sometimes overwinter in mixed (heterospecific) aggregations (Hodek, 2012), which may also facilitate interspecific transmissions. However, although there is some data (De Kesel, 1996) (Harmon et al, 2007;Adriaens et al, 2008;Roy et al, 2012), various interactions between them, including body contacts, are probably frequent. The two species are known to form mixed winter aggregations, and in such aggregations individuals heavily infected with H. virescens occur (Steenberg & Harding, 2010).…”

Section: To 2006 When the First Infection Of H Axyridis By H Viresmentioning

confidence: 99%

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

Ceryngier¹,

Twardowska²

2013

Eur. J. Entomol.

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Abstract.Hesperomyces virescens is an ectoparasite of some Coccinellidae, which until the mid-1990s was relatively rarely only reported from warm regions in various parts of the world. Analysis of the host and distribution data of H. virescens recorded in the Western Palaearctic and North America reveals several trends in the occurrence and abundance of H. virescens: (1) it has recently been much more frequently recorded, (2) most of the recent records are for more northerly (colder) localities than the early records and (3) the recent records are mostly of a novel host, the invasive harlequin ladybird (Harmonia axyridis). While in North America H. virescens is almost exclusively found on H. axyridis, all European records of this association are very recent and still less numerous than records of Adalia bipunctata as a host. However, based on a relatively few published cases of the H. axyridis-H. virescens association in Europe and the case described in this paper, it is clear that the harlequin ladybird is currently the main host of this parasite. These changes in the abundance and geographical distribution of H. virescens are probably linked to some features of H. axyridis, such as its abundance, multivoltinism with overlapping generations, high level of promiscuity and overwintering in mass aggregations. The occurrence of these features in one species may make it especially suitable for H. virescens and other parasites that require close contact of host individuals for efficient transmission. Indeed, some of the data indicate that parasites other than H. virescens, like the podapolipid mite Coccipolipus hippodamiae and allantonematid nematodes of the genus Parasitylenchus may also heavily parasitize H. axyridis. We hypothesize that the acquisition of H. axyridis as a host by H. virescens, C. hippodamiae and Parasitylenchus spp. may have further consequences for the abundance and distribution of these parasites, including the expansion of their ranges to other continents colonized by invasive populations of this ladybird and areas in Asia where H. axyridis is native.

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“…However, it has achieved high abundance and a dominant role among Palaearctic coccinellids in particular habitats (e.g. Hon k & Hodek, 1996;Ricci et al, 2005) and has been implicated in the displacement of native coccinellid species, particularly of Coccinella novemnotata (Wheeler & Hoebeke, 1995;Snyder & Evans, 2006;Frank & McCoy, 2007;Harmon et al, 2007) following its invasion of the Nearctic (Elliott et al, 1996;Reitz & Trumble, 2002). In general, most introduced species fail to become established (Mack et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Why is Coccinella septempunctata so successful? (A point-of-view)

Hodek¹,

Michaud²

2008

Eur. J. Entomol.

124

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Abstract. Factors were examined that could be responsible for the predominance of Coccinella septempunctata (C7) in most habitats of the Palaearctic and for its successful invasion of the Nearctic Region. C7 is euryphagous, but less polyphagous than Harmonia axyridis or Coleomegilla maculata in that it cannot develop or reproduce on non-aphid food. The intraguild status of C7 is intermediate. Although adult size is large, preimaginal stages are palatable to those of H. axyridis and Adalia bipunctata, whereas it is not an intraguild predator of these species. Although these traits appear to be neutral or negative, many aspects of population plasticity are advantageous for C7, often acting in concert with a bet-hedging strategy. Given its high mobility and eurytopy, the inhibition of oviposition in the presence of conspecific larval trails represents an adaptive advantage that favors increased egg dispersal and lowers the risk of offspring mortality due to cannibalism. The ability to temporarily suspend oviposition, combined with heterogenous voltinism and diapause tendencies, enable a portion of C7 populations to feed and reproduce on unpredictably occurring aphid populations. An absence of reproductive diapause in males and pre-hibernation mating are other significant adaptations, along with the tendency to produce offspring in excess of the carrying capacity of local food resources. We suggest that one explanation for the broad geographic success of C7 resides in an ecological plasticity that is based on both genetic and phenotypic polymorphisms.

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The decline of native coccinellids (Coleoptera: Coccinellidae) in the United States and Canada

Cited by 43 publications

References 39 publications

Harmonia axyridis (Coleoptera: Coccinellidae): Smelling the rat in native ladybird declines

Harmonia axyridis (Coleoptera: Coccinellidae): Smelling the rat in native ladybird declines

Harmonia axyridis (Coleoptera: Coccinellidae) as a host of the parasitic fungus Hesperomyces virescens (Ascomycota: Laboulbeniales, Laboulbeniaceae): A case report and short review

Why is Coccinella septempunctata so successful? (A point-of-view)

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