Infestation of a novel host plant by Tephritis conura (Diptera: Tephritidae) in northern Britain: host-range expansion or host shift?

Diegisser, Thorsten; Tritsch, Christian; Seitz, Alfred; Johannesen, Jes

doi:10.1007/s10709-009-9353-3

Cited by 18 publications

(20 citation statements)

References 47 publications

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“…The larvae originating from exotic pastures seem no longer able to properly benefit from their ancestral host, as shown by very high mortality rates and low weight increase of the surviving larvae of this population. This fitness compromise, which is expressed as a host-plant associated fitness trade-off (Via, 1990; Diegisser et al. , 2009) resulting in some degree of maladaptation to the ancestral host plant of this species, is not compatible with the solely host range expansion theory and reinforces that of a host-shift occurrence (Diegisser et al.…”

Section: Discussionmentioning

confidence: 99%

“…This fitness compromise, which is expressed as a host-plant associated fitness trade-off (Via, 1990; Diegisser et al. , 2009) resulting in some degree of maladaptation to the ancestral host plant of this species, is not compatible with the solely host range expansion theory and reinforces that of a host-shift occurrence (Diegisser et al. , 2009) for the population originating from exotic pastures.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, Diegisser et al. (2009) specified that, in this process, the population which would have undergone the host-shift might not be able to use its new and its ancestral host simultaneously, which can be detected by a host-plant associated fitness trade-offs on the ancestral host (Via, 1990; Diegisser et al. , 2009).…”

Section: Introductionmentioning

confidence: 99%

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Invasion success of a scarab beetle within its native range: host range expansion versus host-shift

Lefort

Boyer

Romans

et al. 2014

PeerJ

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Only recently has it been formally acknowledged that native species can occasionally reach the status of ‘pest’ or ‘invasive species’ within their own native range. The study of such species has potential to help unravel fundamental aspects of biological invasions. A good model for such a study is the New Zealand native scarab beetle, Costelytra zealandica (White), which even in the presence of its natural enemies has become invasive in exotic pastures throughout the country. Because C. zealandica still occurs widely within its native habitat, we hypothesised that this species has only undergone a host range expansion (ability to use equally both an ancestral and new host) onto exotic hosts rather than a host shift (loss of fitness on the ancestral host in comparison to the new host). Moreover, this host range expansion could be one of the main drivers of its invasion success. In this study, we investigated the fitness response of populations of C. zealandica from native and exotic flora, to several feeding treatments comprising its main exotic host plant as well as one of its ancestral hosts. Our results suggest that our initial hypothesis was incorrect and that C. zealandica populations occurring in exotic pastures have experienced a host-shift rather than simply a host-range expansion. This finding suggests that an exotic plant introduction can facilitate the evolution of a distinct native host-race, a phenomenon often used as evidence for speciation in phytophagous insects and which may have been instrumental to the invasion success of C. zealandica.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Invasion success of a scarab beetle within its native range: host range expansion versus host-shift

Lefort

Boyer

Romans

et al. 2014

PeerJ

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“…, 1975). Such frequency increases of private alleles may be linked to adaptation (in a broad sense) and may not be solely a consequence of differentiation caused by restricted dispersal (Diegisser et al. , 2009).…”

Section: Discussionmentioning

confidence: 99%

Parapatric diversification after post‐glacial range expansion in the gall flyUrophora cardui(Tephritidae)

Johannesen¹,

Drüeke

Seitz

2010

Journal of Biogeography

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Aim Primary and secondary genetic clines in post‐glacial colonized regions have different implications for biogeographic distributions and the origin of species. Primary clines arise in situ after colonization as adaptive responses to environmental gradients, while secondary clines are caused by contact between vicariant lineages. Here we analyse primary versus secondary origin of a genetic cline in the tephritid fly Urophora cardui in Jutland, Denmark, in a post‐glacial landscape. Location Western Palaearctic. Methods Phylogeographic and demographic analyses of U. cardui based on mitochondrial DNA (mtDNA) genealogies, hierarchical genetic variance tests based on allozymes and distribution analysis of a rare allele from the Jutland cline. Results There was no phylogeographic divergence between the Jutland population of U. cardui north of the cline and neighbouring western European regional populations, which all shared the common western European mtDNA haplotype H1. At nuclear loci, by contrast, the North Jutland population was diverged above the mean level of divergence among regional populations and had no loss of genetic variation. A rare allozyme allele that was frequent in the cline area (up to 45%) and was missing north of the cline also occurred at low frequency (0–14%) elsewhere in the sampling range. Shallow phylogeographic divergence was observed between Russian and western European populations and between English and continental populations. Main conclusions The genetic variation patterns support primary cline evolution and parapatric divergence in Jutland following a demographic expansion of a western European ancestral source population of U. cardui, and suggest cryptic refugia and/or selection in other European population assemblages. The patterns of intra‐specific regional divergence are discussed with respect to the interpretation of cryptic refugia in Europe after the most recent ice age.

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“…While some enemy-victim pairs coevolve in pairwise fashion for long periods, many and perhaps most will reshuffle their associations in time and/or space. Both herbivore host range and a plant's herbivore fauna can vary geographically (Thompson 2005;Logarzo et al 2011), and herbivore-host associations change through evolutionary time via host-range evolution (Dres and Mallet 2002;Diegisser et al 2009;Kato et al 2010), the assembly or evolution of novel communities during climate change (Stastny et al 2006;Pena and Wahlberg 2008;Winkler et al 2009), or large-scale dispersal events (Bertheau et al 2010). With the increasing prevalence of anthropogenic effects on biotas, novel associations also form frequently as exotic species interact with members of their new communities (Graves and Shapiro 2003;Singer et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Impact of attack by Gnorimoschema gallmakers on their ancestral and novel Solidago hosts

Heard

Kitts

2011

Evol Ecol

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Interactions between insect herbivores and host plants can involve herbivorehost pairs that are evolutionarily ancient or only recently associated. Novel herbivore-host species pairs are continually being formed via host shifts, dispersal, and increasingly via anthropogenic introductions. Conceptual models of enemy-victim coevolution (specifically, the evolution of plant tolerance and of insect virulence) suggest that the impact of an herbivore on its novel host should, at least at first, be more intense than its impact on its ancestral host. We tested this hypothesis for the specialist gallmaking caterpillar Gnorimoschema gallaesolidaginis (Lepidoptera: Gelechiidae) on its ancestral and novel hosts, Solidago altissima and S. gigantea. We measured aboveground ramet mass for paired attacked and unattacked ramets of each species at two sites (Fredericton, NB, and Toronto, ON, Canada), and also measured allocation of tissue mass to stems, leaves, and flowers in galled and ungalled ramets. G. gallaesolidaginis attack reduced ramet growth considerably more on S. gigantea, the novel host, consistent with the coevolutionary hypothesis. We were unable to detect reallocation of tissues in galled ramets as a mechanism for tolerance, and found no intraspecific difference in the impact of gallmaking on allocation patterns. Herbivore host shifts between alternative native hosts will provide an excellent opportunity to understand the evolutionary history of novel herbivore-host associations, particularly (as in the Solidago system) when multiple insect herbivores have host-shifted across the same plant pair.

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Infestation of a novel host plant by Tephritis conura (Diptera: Tephritidae) in northern Britain: host-range expansion or host shift?

Cited by 18 publications

References 47 publications

Invasion success of a scarab beetle within its native range: host range expansion versus host-shift

Invasion success of a scarab beetle within its native range: host range expansion versus host-shift

Parapatric diversification after post‐glacial range expansion in the gall flyUrophora cardui(Tephritidae)

Impact of attack by Gnorimoschema gallmakers on their ancestral and novel Solidago hosts

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