In early papers (Loiselle et al. 1995; Kalisz et al. 2001), we introduced a measure of inter-individual genetic relatedness that has become the default in the most-widely-used software for the spatial autocorrelation analyses of fine-scale genetic structure (FSGS) within populations. Read more about The evolution of fine-scale spatial genetic structure
The exceptional diversity of phytophagous insects may be due in part to their propensity for speciation via host-race formation. In our research, we have focused on two closely-related goldenrods (Solidago altissimaand S. gigantea) and their insect herbivores as a model system to study host shifts (and eventual speciation) by multiple evolutionarily independent insect lineages on the same host plant pair. Read more about The evolution of host race formation and cryptic speciation in plant-feeding insects
Combining ecological and genetic approaches, we have examined the process of biological invasion in three different plant systems. In multiflora rose (Rosa multiflora) we used genetic markers to quantify the relative contributions of sexual reproduction via seed versus vegetative reproduction via clonal spread to local patterns of invasion (Jesse et al. 2010). In purple loosestrife (Lythrum salicaria) we compared phenotypic plasticity of native European versus invasive North American populations in response to variation in water and nutrient levels (Chun et al. 2007). Read more about The ecology and evolution of invasive plant species
A. B. Duthie, Abbott, K. C., and Nason, J. D., “Trade-offs and coexistence: a lottery model applied to fig wasp communities.”, American Naturalist, vol. 183, pp. 826-841, 2014. Read more about Nason Lab publication: Trade-offs and coexistence: a lottery model applied to fig wasp communities
Former Nason Lab PhD student Brad Duthie and colleagues have recently published a paper in American Naturalist investigating the mechanism of coexistence of multiple, ecologically similar fig wasp species coexisting on a single fig host. Here is a brief summary of the ecological issues addressed and the paper's findings.
Although figs (genus Ficus) are a diverse and a common component of tropical and subtropical ecosystems, individual species often occur at extraordinarily low population densities, creating a challenge for successful fig wasp dispersal between hosts and pollination. Read more about The ecology and evolution of figs and fig wasps