Linking patterns and processes of species diversification in the cone flies Strobilomyia (Diptera: Anthomyiidae)

Sachet, Jean-Marie; Roques, Alain; Després, Laurence

doi:10.1016/j.ympev.2006.06.005

Cited by 11 publications

(15 citation statements)

References 106 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies of conifer-feeding insects in the Holarctic region have also rejected the hypothesis of independent radiations of these insects in Europe, Asia and North America [70-72]. The lack of resolution and/or incomplete sampling in these phylogenies does not allow for a detailed comparison of the evolution of the association with conifer genera with our results.…”

Section: Discussioncontrasting

confidence: 91%

Is ecological speciation a major trend in aphids? Insights from a molecular phylogeny of the conifer-feeding genus Cinara

et al. 2013

View full text Add to dashboard Cite

IntroductionIn the past decade ecological speciation has been recognized as having an important role in the diversification of plant-feeding insects. Aphids are host-specialised phytophagous insects that mate on their host plants and, as such, they are prone to experience reproductive isolation linked with host plant association that could ultimately lead to species formation. The generality of such a scenario remains to be tested through macroevolutionary studies. To explore the prevalence of host-driven speciation in the diversification of the aphid genus Cinara and to investigate alternative modes of speciation, we reconstructed a phylogeny of this genus based on mitochondrial, nuclear and Buchnera aphidicola DNA sequence fragments and applied a DNA-based method of species delimitation. Using a recent software (PhyloType), we explored evolutionary transitions in host-plant genera, feeding sites and geographic distributions in the diversification of Cinara and investigated how transitions in these characters have accompanied speciation events.ResultsThe diversification of Cinara has been constrained by host fidelity to conifer genera sometimes followed by sequential colonization onto different host species and by feeding-site specialisation. Nevertheless, our analyses suggest that, at the most, only half of the speciation events were accompanied by ecological niche shifts. The contribution of geographical isolation in the speciation process is clearly apparent in the occurrence of species from two continents in the same clades in relatively terminal positions in our phylogeny. Furthermore, in agreement with predictions from scenarios in which geographic isolation accounts for speciation events, geographic overlap between species increased significantly with time elapsed since their separation.ConclusionsThe history of Cinara offers a different perspective on the mode of speciation of aphids than that provided by classic models such as the pea aphid. In this genus of aphids, the role of climate and landscape history has probably been as important as host-plant specialisation in having shaped present-day diversity.

show abstract

Section: Discussioncontrasting

confidence: 91%

Is ecological speciation a major trend in aphids? Insights from a molecular phylogeny of the conifer-feeding genus Cinara

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Firstly, the phenological differences observed among species have a genetic basis; indeed, when pupae are kept in the same laboratory conditions during the winter, the adult emergence times of the three Strobilomyia species are preserved ( Roques et al , 1984;Roques, 1988 ). These Strobilomyia communities share a common ancestor from approximately 3.65 million years ago ( Sachet et al , 2006 ), and the observed pattern in the initial community of Strobilomyia , which later expanded into several regions, including Europe, Asia, and North America, could have arisen through chance. These Strobilomyia communities share a common ancestor from approximately 3.65 million years ago ( Sachet et al , 2006 ), and the observed pattern in the initial community of Strobilomyia , which later expanded into several regions, including Europe, Asia, and North America, could have arisen through chance.…”

Section: Competition and Phenological Shiftsmentioning

confidence: 99%

“…They are taxonomically close to the genus Chiastocheta ( Pellmyr, 1989 ), but are strict seed predators and do not contribute to the pollination of their host. Full-grown third-instar larvae drop to the ground where they pupate and overwinter ( Roques et al , 1984;Sachet et al , 2006 ). The larvae tunnel into the cone, feeding on both tissue and seeds.…”

Section: Introductionmentioning

confidence: 99%

Adaptive radiation through phenological shift: the importance of the temporal niche in species diversification

Sachet

Poncet

Roques

et al. 2009

Ecological Entomology

Self Cite

View full text Add to dashboard Cite

International audience1. Phenological shift in oviposition in seed predators may be a key factor for adaptive radiation if temporal differences lead to less intense competition. 2. This hypothesis was tested at two sites in the French Alps in three sympatric species of larch cone flies grouped into two phenological groups (early and late) differing in adult emergence and oviposition timing by approximately 2 weeks. The present study assessed the intensity of competition within and between groups by measuring four larval traits. Cone traits were measured, and the impact of early species parasitism on cone development was assessed. 3. The occupation of the central axis of a developing cone by one early larva has a strong detrimental effect on cone growth and seed production. However, there was almost no correlation between the variables measured on the cones and on the larvae, suggesting that the resources available were not limiting. 4. Inter-group competition had no significant effect on early larvae. In contrast, both inter- and intra-group competition had a significant negative effect on late larvae length (-11% and -16% respectively), dry mass (-8% and -23%), and lipid mass (-15% and -26%). The intensity of competition was stronger among larvae in the same phenological group, which is consistent with the hypothesis that shifts in oviposition promote adaptive radiation in larch cone flies by reducing competition among larvae

show abstract

“…Fullgrown third-instar larvae drop to the ground where they pupate and overwinter. Adult emergence is observed the following spring, but pupae frequently remain in prolonged diapause for up to 4 years (Roques 1988;Sachet et al 2006).…”

Section: Study Sites and Speciesmentioning

confidence: 99%

The effect of climate on masting in the European larch and on its specific seed predators

et al. 2008

Self Cite

View full text Add to dashboard Cite

Masting is the intermittent production of large seed crops by a population of plants. Two main hypotheses have been proposed to explain masting. Variations in seed crop may result from stochastic climate factors (temperature, rainfall, etc.), and/or masting may be a plant evolutionary strategy to avoid specific seed predators. To determine the effect of climate on the annual pattern of cone production in the European larch (Larix decidua), we analyzed larch cone production from 1975 to 2005 at 20 sites in the French Alps, ranging from 1,300 to 2,100 m a.s.l. (on average 17 years per site were sampled). We examined the effects of mast seeding on the predation of larch cones by the dominant specific pre-dispersal seed predators, cone fly Strobilomyia spp. Larch cone production varied across the years and was spatially synchronized throughout the region. We constructed two models to explain seed production, one for sites at low (<1,800 m) and one for sites at high (> or =1,800 m) altitudes, using partial least squares (PLS) regressions to detect across a large number of climate indices (306) the factors which best explain cone production. Monthly indices were more accurate descriptors than 4-month period indices. The predation rate was lower in high cone production years that followed low production years, supporting the predator satiation hypothesis. However, variable cone production explained only a small part of predation rates (45 and 25% at low and high altitudes, respectively). Predation was also directly affected by climate conditions. PLS regressions taking into account both cone production and climate factors accounted for as much as 68 and 82% of the predation rate variation at low and high altitudes, respectively. This study contributes to a better understanding of how climate factors differently affect the members of an interacting community.

show abstract

Linking patterns and processes of species diversification in the cone flies Strobilomyia (Diptera: Anthomyiidae)

Cited by 11 publications

References 106 publications

Is ecological speciation a major trend in aphids? Insights from a molecular phylogeny of the conifer-feeding genus Cinara

Is ecological speciation a major trend in aphids? Insights from a molecular phylogeny of the conifer-feeding genus Cinara

Adaptive radiation through phenological shift: the importance of the temporal niche in species diversification

The effect of climate on masting in the European larch and on its specific seed predators

Contact Info

Product

Resources

About