Greg M. Walter

Why development time matters: temperature influences plasticity while nutritional stress reshapes selection and evolutionary potential

This study shows that temperature has the largest plastic effect on development time in Drosophila, but nutritional stress more strongly influences selection and evolvability.

Interactions between thermal and nutritional stress reveal cryptic adaptive potential

This study shows that adaptive potential in Drosophila depends on interactions between temperature and nutritional stress, revealing environment-dependent genetic variation.

Evidence from the field that multiple processes maintain hidden adaptive capacity to a novel environment in a wild daisy

The paper shows that genetic variation for adapting to novel environments is maintained in wild daisies through inefficient selection and dominance, with heritable effects on plasticity and fitness.

Local adaptation in climate tolerance at a small geographic scale contrasts with broad latitudinal patterns

The paper compares climate tolerance variation across a broad latitudinal gradient and local environmental heterogeneity in Drosophila melanogaster, finding similar levels of adaptation at both scales.

Genetic differences in plasticity across environmental scales determine fitness along an ecological gradient

The paper examines how genetic differences in plasticity across environmental scales affect fitness along an ecological gradient in a Sicilian daisy.

Variation in temperature but not diet determines the stability of latitudinal clines in tolerance traits and their plasticity

This study shows that temperature, not diet, shapes latitudinal clines in stress tolerance traits and their plasticity in Drosophila melanogaster.

Parallel mosaic speciation via mutation-order and ecological divergence

The paper shows that ecological divergence and mutation-order processes together drive reproductive isolation in the Senecio lautus species complex through parallel mosaic speciation.