A consistent species richness–climate relationship for oaks across the Northern Hemisphere
Although the effects of climate on species richness are known, regional processes
may lead to different species richness–climate relationships across continents
resulting in species richness anomalies, especially for tropical groups. Phylogenetic
niche conservatism may also influence species richness–climate relationships of different
lineages. Here, we tested whether regional effects also exist for temperate
lineages using the genus Quercus.