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 …

Aim An important, unresolved question in macroecology is to understand the immense inter‐
specific variation in geographic range sizes. While species traits such as fecundity or body …

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 …

Aim To quantify the contributions of environment, phylogeny and geography to variation in
the breeding and non‐breeding geographical range sizes of oscine passerines. Location …

Aim Species richness is unevenly distributed among clades, reflecting differences in the
extent to which species co‐occur, their rates of geographical turnover and total area …

Aim Across a variety of taxonomic scales, species diversity is unevenly distributed among its
constituent units, and clades with few species are more common than expected assuming …

The degree to which Grinnellian and Eltonian niche characteristics influence species
distribution may depend on latitude. Tropical regions are environmentally stable and …

Seasonal migration has been alternately proposed to promote geographic range size in
some contexts and to constrain it in others, but it remains unclear if migratory behavior has a …

Aim Variation in species diversity among different geographical areas may result from
differences in speciation and extinction rates, immigration and time for diversification. An …

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 …