Under the isolation‐by‐distance model, the strength of spatial genetic structure (SGS) depends on seed and pollen dispersal and genetic drift, which in turn depends on local demographic structure. SGS can also be influenced by historical events such as admixture of differentiated gene pools. We analysed the fine‐scale SGS in six populations of a pioneer tree species endemic to Central Africa, Aucoumea klaineana . To infer the...