Citizen-science projects engage volunteers to gather or process data to address scientific
questions. But citizen-science projects vary in their ability to contribute usefully for science …

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An implicit assumption of speciation biology is that population differentiation is an important
stage of evolutionary diversification, but its significance as a rate-limiting control on …

High tropical species diversity is often attributed to evolutionary dynamics over long
timescales. It is possible, however, that latitudinal variation in diversification begins when …

A fundamental need in conserving species and their habitats is defining distinct entities that
range from individuals to species to ecosystems and beyond (Table; Ryder …

In this paper we describe eBird, a citizen-science project that takes advantage of the human
observational capacity to identify birds to species, which is then used to accurately represent …

Aim Geological barriers within a species range play a key role in sha** patterns of genetic
variation by restricting gene flow. Mountain ranges are particularly imposing barriers …

Aim The study of biogeographic barriers is instrumental in understanding the evolution and
distribution of taxa. With the increasing availability of empirical datasets, emergent patterns …

Chromosomal rearrangement can be an important mechanism driving population
differentiation and incipient speciation. In the mountain pine beetle (MPB, Dendroctonus …

Background Mesoamerica is a remarkable region with a high geological and ecological
complexity. Within northern Mesoamerica, the biotic province of the Sierra Madre del Sur …