Understanding the mechanisms underlying species formation and differentiation is a central
goal of evolutionary biology and a formidable challenge. This understanding can provide …

While the study of the origins of biological diversity across species has provided numerous
examples of adaptive divergence, the realization that it can occur at microgeographic scales …

Abstract The Gulf of Guinea, in the Atlantic coast of Central Africa, has three oceanic islands
that arose as part of the Cameroon Volcanic Line. From northeast to southwest these are …

The polytypic species concept unites populations that theoretically could and would
interbreed were the opportunity to arise. This concept places the burden of proof of …

Comprehensive studies of evolution have historically been hampered by the division among
disciplines. Now, as biology moves towards an '‐omics' era, it is more important than ever to …

Disentangling the effects of ecological disruptions operating at different spatial and temporal
scales in sha** past species' demography is particularly important in the current context of …

Among birds, white-eyes (genus Zosterops) have diversified so extensively that Jared
Diamond and Ernst Mayr referred to them as the “great speciator.” The Zosterops lineage …

As a dispersive lineage expands its distribution across a heterogeneous landscape, it
leaves behind allopatric populations with varying degrees of geographic isolation that often …

Examining what happens when two closely related species come into secondary contact
provides insight into the later stages of the speciation process. The Zosteropidae family of …

Chromosomal organization is relatively stable among avian species, especially with regards
to sex chromosomes. Members of the large Sylvioidea clade however have a pair of neo-sex …