Ecologically mediated selection against hybrids, caused by hybrid phenotypes fitting poorly
into available niches, is typically viewed as distinct from selection caused by epistatic …

Observations about the number, frequency, effect size, and genomic distribution of alleles
associated with complex traits must be interpreted in light of evolutionary process. These …

Extreme events can be a major driver of evolutionary change over geological and
contemporary timescales. Outstanding examples are evolutionary diversification following …

The repeated adaptation of oceanic threespine sticklebacks to fresh water has made it a
premier organism to study parallel evolution. These small fish have multiple distinct …

Ecological speciation is the process by which reproductively isolated populations emerge as
a consequence of divergent natural or ecologically-mediated sexual selection. Most …

A major goal of evolutionary biology is to identify the genotypes and phenotypes that
underlie adaptation to divergent environments. Stickleback fish, including the threespine …

How rapidly can animal populations in the wild evolve when faced with sudden
environmental shifts? Uplift during the 1964 Great Alaska Earthquake abruptly created …

Rapid adaptive radiation poses two distinct questions apart from speciation and adaptation:
What happens after one speciation event and how do some lineages continue speciating …

Similar forms often evolve repeatedly in nature, raising long-standing questions about the
underlying mechanisms. Here, we use repeated evolution in stickleback to identify a large …

Adaptation in the wild often involves standing genetic variation (SGV), which allows rapid
responses to selection on ecological timescales. However, we still know little about how the …