Data from: Rapid adaptation to novel climate at the northern range edge of the invasive Asian tiger mosquito Aedes albopictus: a moving target
Medley, Kim A.
Westby, Katie M.
Jenkins, David G.
Published Aug 30, 2019 on Dryad.
Cite this dataset
Medley, Kim A.; Westby, Katie M.; Jenkins, David G. (2019). Data from: Rapid adaptation to novel climate at the northern range edge of the invasive Asian tiger mosquito Aedes albopictus: a moving target [Dataset]. Dryad. https://doi.org/10.5061/dryad.gg464kh
1. Rapid adaptation in response to novel environments can facilitate species invasions and range expansions. Understanding how invasive disease vectors rapidly evolve to novel conditions—particularly at the edge of its non-native range—has important implications for mitigating the prevalence and spread of disease.
2. Here, we evaluate the role of local adaptation in overwintering capability of the Asian tiger mosquito, Aedes albopictus. This species invaded the Southern US in the 1980s and rapidly spread northward into novel climate compared to its native range. Photoperiodically induced egg diapause is a key trait contributing to the establishment and spread of Ae. albopictus in temperate latitudes, and diapause incidence rapidly developed a cline along a latitudinal gradient in the US shortly after its initial invasion. However, variation in overwintering survival of diapause-induced eggs along this gradient is not known, but is critical to the fitness-related role of diapause evolution in the establishment and spread of Ae. albopictus in its northern US range.
3. Using reciprocal transplants, we detected local adaptation in overwinter survival of diapausing Aedes albopictus eggs. In northern range-edge winters, eggs produced by range-edge individuals survived better than those produced by range-core individuals. Diapause eggs from range-edge and range-core locations survived equally well in range-core winters, and no eggs survived a winter beyond the current northern range limit in the US.
4. Synthesis and applications. These results demonstrate rapid (~ 3 decades) local adaptation of egg diapause, a key trait facilitating overwinter survival and range expansion for the invasive Asian tiger mosquito. In light of these results, control efforts could shift from targeting satellite populations to a focus on preventing dispersal into locally adapted, range-edge locations and to aim removal efforts towards areas surrounding locally adapted populations. Adopting new approaches to target rapidly adapting populations will require large-scale collaboration among control agencies and research institutions, and should begin in the northern US range to better control Ae. albopictus mosquito populations in the face of rapid adaptation.
Overwinter survival of diapause eggs of Aedes albopictus
Survival of diapause-induced eggs of Aedes albopictus in 24 experimental location-treatment combinations. site: overwintering site; range: location of origin for experimental Ae. albopictus mosquitos (in the core or edge of the US range); winterlocale: overwinter location (GA=Georgia, USA; PA=Pennsylvania, USA; WI=Wisconsin, USA; control=environmental chamber; survival: percent of diapause-induced eggs that survived the experimental winter; latitude: latitude of origin of field-collection mosquitoes; total_survived: number of diapause-induced eggs that survived their experimental winter; total_died: number of diapause-induced eggs that died under experimental winter; total_eggs: total number of diapause-induced eggs subject to winter treaments