Data from: Adaptive and non-adaptive divergence in a common landscape

Species in a common landscape often face similar selective environments.
The capacity of organisms to adapt to these environments may be largely
species specific. Quantifying shared and unique adaptive responses across
species within landscapes may thus improve our understanding of
landscape-moderated biodiversity patterns. Here we test to what extent
populations of two coexisting and phylogenetically related
fishes—three-spined and nine-spined stickleback—differ in the strength and
nature of neutral and adaptive divergence along a salinity gradient.
Phenotypic differentiation, neutral genetic differentiation and genomic
signatures of adaptation are stronger in the three-spined stickleback.
Yet, both species show substantial phenotypic parallelism. In contrast,
genomic signatures of adaptation involve different genomic regions, and
are thus non-parallel. The relative contribution of spatial and
environmental drivers of population divergence in each species reflects
different strategies for persistence in the same landscape. These results
provide insight in the mechanisms underlying variation in evolutionary
versatility and ecological success among species within landscapes.