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Table 1 Models to explain the partitioning of chimpanzee genetic variability across the study region, and associated predictions

From: Environmental variation and rivers govern the structure of chimpanzee genetic diversity in a biodiversity hotspot

Predictions

Riverine barriers

Ecological variation

Diversity of neutral alleles

Highest on opposite banks of Sanaga and Mbam Rivers

Significant correlations between the distribution of allelic diversity and variation in one or more environmental variables.

Population divergence (T MRCA )

Broad spectrum of time intervals

Broad spectrum of time intervals

Barriers to gene flow are located

At the Sanaga, with highest resistance at the Sanaga Delta and decreasing towards headwaters

At or near ecotone boundaries, but not at adjacent Guinean-Congolian rainforest boundary in western Cameroon

Population history includes

Demographic stability, other scenarios possible

Demographic stability, other scenarios possible