DOI: 10.5061/dryad.3tc00
title: Data from: Congruent phylogeographic patterns of eight tree species in Atlantic Central Africa provide insights on the past dynamics of forest cover

description: Cycles of Quaternary climate change are assumed to be major drivers of
 African rainforest dynamics and evolution. However, most hypotheses on
 past vegetation dynamics relied on palaeobotanical records, an approach
 lacking spatial resolution, and on current patterns of species diversity
 and endemism, an approach confounding history and environmental
 determinism. In this context, a comparative phylogeographic study of
 rainforest species represents a complementary approach because Pleistocene
 climate fluctuations may have left interpretable signatures in the
 patterns of genetic diversity within species. Using 1274 plastid DNA
 sequences from eight tree species (Afrostyrax kamerunensis, A.
 lepidophyllus, Erythrophleum suaveolens, Greenwayodendron suaveolens,
 Milicia excelsa, Santiria trimera, Scorodophloeus zenkeri, Symphonia
 globulifera) sampled in 50 populations of Atlantic Central Africa (ACA),
 we averaged divergence across species to produce the first map of the
 region synthesizing genetic distinctiveness and standardized divergence
 within and among localities. Significant congruence in divergence was
 detected mostly among five of the eight species and was stronger in the
 northern ACA. This pattern is compatible with a scenario of past forest
 fragmentation and recolonization whereby forests from eastern Cameroon and
 north-eastern Gabon would have been more affected by past climate change
 than those of western Cameroon (where one or more refugia would have
 occurred). By contrast, southern ACA (Gabon) displayed low congruence
 among species that may reflect less drastic past forest fragmentation or a
 more complex history of vegetation changes. Finally, we also highlight the
 potential impact of current environmental barriers on spatial genetic
 structures.
description: Input file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Afrostyrax
 kamerunensisList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Afrostyrax
 Kam.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Afrostyrax
 lepidophyllusList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Afrostyrax
 lep.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Erythrophleum
 suaveolensList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Erythrophleum
 suaveolens.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of
 Greenwayodendron suaveolens subsp. suaveolens var.
 suaveolensList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Greenwayodendron
 suaveolens.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Milicia
 excelsaList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Milicia
 excelsa.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Santiria
 trimeraList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Santiria
 trimera.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Scorodophloeus
 zenkeriList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Scorodophloeus
 zenkeri.xlsInput file for the
 analysis of chloroplastic trnC-pet1N sequences diversity of Symphonia
 globuliferaList of individuals,
 geographical coordinates (decimal degrees), haplotypes and matrix of
 genetic distance between haplotypes.Symphonia
 globulifera.xls