Aim One prominent explanation for the latitudinal gradient in biodiversity proposes that its
prime cause is the greater age and/or higher origination rates of tropical clades, and the …

Net diversification rates were estimated for samples of primarily tribe‐to‐family‐level clades
of passerine birds, taking into account extinction as well as speciation. Two samples were …

Low-elevation regions harbour the majority of the world's species diversity compared to high-
elevation areas. This global gradient suggests that lowland species have had more time to …

Phylogeographical analyses provide information about the role of evolutionary processes
underlying species diversity of the Neotropical montains. We used mitochondrial DNA …

Aim Many hypotheses exist to explain the astonishing variation in geographical range size
across species, but these have rarely been tested under a unifying framework that …

We infer from the literature that migratory habits of birds evolved in various phylogenetic
lineages and biogeographical contexts, either after gradual range expansion into seasonal …

Understanding geographic variation in the species richness and lineage composition of
regional biotas is a long-standing goal in ecology. Why do some evolutionary lineages …

Regional variation in clade richness can be vast, reflecting differences in the dynamics of
historical dispersal and diversification among lineages. Although it has been proposed that …

Aim Recent research suggests that the latitudinal diversity gradient (LDG) in birds is unlikely
to result from faster diversification in the tropics. This puts the focus on other mechanisms …

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