▪ Abstract Species are routinely used as fundamental units of analysis in biogeography,
ecology, macroevolution, and conservation biology. A large literature focuses on defining …

Hybridization in plants and animals is more common and has more complex outcomes than
previously realized. Genome-wide analyses of introgression in organisms ranging from oaks …

Charles Darwin's experiences in the Galápagos Islands in 1835 helped to guide his
thoughts toward a revolutionary theory: that species were not fixed but diversified from their …

Despite hundreds of reports involving both plants and animals, the mechanisms underlying
introgression remain obscure, even if some form of selection is frequently invoked …

Even before the publication of Darwin's Origin of Species, the perception of evolutionary
change has been a tree-like pattern of diversification-with divergent branches spreading …

Hybridization has a major role in evolution—from the introgression of important phenotypic
traits between species, to the creation of new species through hybrid speciation. Molecular …

With the advent of genetic engineering, designer crops might interbreed with natural
populations. Could such romances lead to the evolution of superweeds, as some have …

Although soil microbial communities are known to play crucial roles in the cycling of
nutrients in forest ecosystems and can vary by plant species, how microorganisms respond …

One of Anthropocene's most daunting challenges for conservation biology is habitat
extinction, caused by rapid global change. Tree diversity has persisted through previous …

Hybrid zones are 'natural laboratories' for studying the origin, maintenance and demise of
species. Theory predicts that hybrid zones can move in space and time, with significant …