Rapid And Repeated Local Adaptation To Climate In An Invasive Plant

van Boheemen, L. A., Atwater, D. Z., & Hodgins, K. A. (2018). Rapid And Repeated Local Adaptation To Climate In An Invasive Plant. New Phytologist 

doi.org/10.1111/nph.15564

Biological invasions provide opportunities to study evolutionary processes occurring over contemporary timescales. To explore the speed and repeatability of adaptation, we examined the divergence of life-history traits to climate, using latitude as a proxy, in the native North American and introduced European and Australian ranges of the annual plant Ambrosia artemisiifolia. We explored niche changes following introductions using climate niche dynamic models. In a common garden, we examined trait divergence by growing seeds collected across three ranges with highly distinct demographic histories. Heterozygosity-fitness associations were used to explore the effect of invasion history on potential success. We accounted for non-adaptive population differentiation using 11,598 SNPs. We revealed a centroid shift to warmer, wetter climates in the introduced ranges. We identified repeated latitudinal divergence in life-history traits, with European and Australian populations positioned at either end of the native clines. Our data indicate rapid and repeated adaptation to local climates despite the recent introductions and a bottleneck limiting genetic variation in Australia. Centroid shifts in the introduced ranges suggest adaptation to more productive environments, potentially contributing to trait divergence between the ranges.

Publications
EICA Fails As An Explanation Of Growth And Defence Evolution Following Multiple Introductions

van Boheemen, L.A., Bou-Assi, S., Uesugi, A., Hodgins, K.A. (2018). EICA Fails As An Explanation Of Growth And Defence Evolution Following Multiple Introductions. bioRxiv  doi.org/10.1101/435271 Rapid adaptation is aiding invasive populations in their competitive success. The evolution of increased competitive ability (EICA) hypothesis posits this enhanced performance results from escape from native enemies, yet its …

Publications
Compensatory and additive helper effects in the cooperatively breeding Seychelles warbler (Acrocephalus sechellensis).

van Boheemen, L. A., Hammers, M., Kingma, S. A., Richardson, D. S., Burke, T., Komdeur, J., & Dugdale, H. L. (2018). Compensatory and additive helper effects in the cooperatively breeding Seychelles warbler (Acrocephalus sechellensis). Ecology & Evolution https://onlinelibrary.wiley.com/doi/10.1002/ece3.4982 In cooperatively breeding species, helper aid may affect dominant breeders investment trade-offs …

Publications
Multiple introductions, admixture and bridgehead invasion characterize the introduction history of Ambrosia artemisiifolia in Europe and Australia.

van Boheemen, L. A., Lombaert, E., Nurkowski, K. A., Gauffre, B., Rieseberg, L. H., & Hodgins, K. A. Multiple introductions, admixture and bridgehead invasion characterize the introduction history of Ambrosia artemisiifolia in Europe and Australia. Molecular Ecology. Admixture between differentiated populations is considered to be a powerful mechanism stimulating the invasive …