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- Solbreck, Christer
(författare)
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Climate change and longterm patch dynamics of a perennial herb
- 2012
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Ingår i: Basic and Applied Ecology. - : Elsevier BV. - 1439-1791 .- 1618-0089. ; 13, s. 414-422
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Tidskriftsartikel (refereegranskat)abstract
- The patch system is presently not in equilibrium and this is probably the result of the new climatic regime. The number of patches increases steadily, most patches increase synchronously in size, and there is a positive feed back of patch size on rate of increase. Still, rates of increase are low, and in a three decade perspective the distribution of plant resources at the landscape scale remains essentially unchanged.
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- Solbreck, Christer
(författare)
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De stinker och strålar
- 2015
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 136, s. 173-174
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Annan publikation (populärvet., debatt m.m.)
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| 5. |
- Solbreck, Christer
(författare)
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En flughistoria
- 2018
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Ingår i: Entomologisk tidskrift. - 0013-886X. ; 139, s. 89-97
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Tidskriftsartikel (populärvet., debatt m.m.)
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- Solbreck, Christer
(författare)
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Ovanligt långlivade insekter
- 2013
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Ingår i: Forskning och framsteg. - 0015-7937. ; 2013, s. 46-51
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Forskningsöversikt (populärvet., debatt m.m.)
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| 9. |
- Solbreck, Christer
(författare)
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Oviposition preference and larval performance of the sweet potato butterfly Acraea acerata on Ipomoea species in Ethiopia
- 2010
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Ingår i: Agricultural and Forest Entomology. - : Wiley. - 1461-9555 .- 1461-9563. ; 12, s. 161-168
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Tidskriftsartikel (refereegranskat)abstract
- The sweet potato butterfly Acraea acerata is an indigenous species in Ethiopia that has become a major pest on the introduced sweet potato Ipomoea batatas. To assess the role of wild Ethiopian Ipomoea species as host plants, the presence of larvae on wild ipomoeas was studied, and female oviposition choice and larval performance were tested on five wild ipomoeas, as well as on sweet potato.In laboratory tests, oviposition and larval development were successful on two wild ipomoeas (Ipomoea tenuirostris and Ipomoea cairica) but no oviposition occurred on the remaining three species. Of the latter, larvae did not feed on Ipomoea hochstetteri and Ipomoea indica, and survival rates were extremely low on Ipomoea purpurea.Sweet potato was a better host plant than I. tenuirostris and I. cairica in terms of oviposition preference, larval survival and pupal size; pupae were larger, resulting in more fecund female butterflies.In the wild butterfly populations were abundant on I. tenuirostris but absent on I. cairica. Females also tended to prefer I. tenuirostris to I. cairica in oviposition choice experiments. However, no significant differences in performance were found between larvae raised on I. tenuirostris and I. cairica in the laboratory.Wild populations of A. acerata also existed on Ipomoea obscura, a plant not investigated in the present study.The abundance of A. acerata on wild ipomoeas is too low to likely affect butterfly population densities on sweet potato. However, wild populations may act as reservoirs subsequent to butterfly population bottlenecks on sweet potato.
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- Solbreck, Christer, et al.
(författare)
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Post-glacial colonization of the Fennoscandian coast by a plant parasitic insect with an unusual life history
- 2023
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Ingår i: Ecology and Evolution. - 2045-7758. ; 13
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Tidskriftsartikel (refereegranskat)abstract
- Species that exhibit very peculiar ecological traits combined with limited dispersal ability pose a challenge to our understanding of ecological and evolutionary mechanisms. This is especially true when they have managed to spread over long distances, overcome physical barriers, and colonize large areas. Climate and landscape changes, trophic web relations, as well as life history all interact to shape migration routes and present-day species distributions and their population genetic structures. Here we analyzed the post-glacial colonization of northern Europe by the gall midge Contarinia vincetoxici, which is a monophagous parasite on the perennial herb White swallowwort (Vincetoxicum hirundinaria). This insect not only has a narrow feeding niche but also limited dispersal ability and an exceptionally long dormancy. Gall midge larvae (n = 329) were collected from 16 sites along its distribution range in Denmark, Sweden, and Finland. Using microsatellite loci and knowledge of the species and the regions' history, we investigated the role of landscape change, host plant distribution, insect population dynamics, and life history in shaping the population genetic structure of the insect. We devoted particular interest to the role of the insect's presumed poor dispersal capacity in combination with its exceptionally extended diapause. We found significant levels of local inbreeding (95% highest posterior density interval = 0.42-0.47), low-level within-population heterozygosity (mean H-E = 0.45, range 0.20-0.61) with private alleles in all populations except two. We also found significant (p < .001) regional isolation-by-distance patterns, suggesting regularly recurring mainly short-distance dispersal. According to approximate Bayesian computations, C. vincetoxici appears to have colonized the study area via wind-aided flights from remote areas approximately 4600-700 years before present when the land has gradually risen above the sea level. Extremely long dormancy periods have allowed the species to "disperse in time", thereby aiding population persistence despite generally low census population sizes.
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