Past climate changes explain the phylogeography of Vitellaria paradoxa over Africa

Allal, François; Sanou, Haby; Millet, Laurent; Alexandre, Veriano; Camus-Kulandaivelu, Létizia; Logossa, Zénor Ablah; Lefèvre, François; Bouvet, Jean‐Marc

doi:10.1038/hdy.2011.5

Cited by 56 publications

(63 citation statements)

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“…This suggests that dispersal from refugia occurred over relatively short distances, probably due to the influence of geographic barriers, as invoked to explain the genetic structuring of other dry woodland and savannah species in the Sudano-Sahelian region (for example, shea tree, Allal et al, 2011). For example, in the Chad basin, an inundation during the Quaternary pluvial, followed by the formation of a Mega-Lake was suggested to have isolated baobab populations of West Africa from those of East Africa (Pock Tsy et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

“…A study of Acacia nilotica populations showed genetic differences that broadly matched subspecific designations and a phylogeographic separation of North and West Africa from East and Southern Africa (Wardill et al, 2005). The other two studies, of the baobab tree (Adansonia digitata L., Malvaceae; Pock Tsy et al, 2009) and the shea tree (Vitellaria paradoxa C. F. Gaertn, Sapotaceae; Allal et al, 2011) showed strong phylogeographic structure, distinguishing Eastern and Western populations within the Sudano-Sahelian region. However, the ecological distribution of the baobab tree only partially matches that of the dry woodlands and savannahs, and the shea tree has a limited distribution in the SudanoSahelian zone.…”

Section: Introductionmentioning

confidence: 99%

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Plio-Pleistocene history and phylogeography of Acacia senegal in dry woodlands and savannahs of sub-Saharan tropical Africa: evidence of early colonisation and recent range expansion

et al. 2012

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Drylands are extensive across sub-Saharan Africa, socio-economically and ecologically important yet highly sensitive to environmental changes. Evolutionary history, as revealed by contemporary intraspecific genetic variation, can provide valuable insight into how species have responded to past environmental and population changes and guide strategies to promote resilience to future changes. The gum arabic tree (Acacia senegal) is an arid-adapted, morphologically diverse species native to the sub-Saharan drylands. We used variation in nuclear sequences (internal transcribed spacer (ITS)) and two types of chloroplast DNA (cpDNA) markers (PCR-RFLP, cpSSR) to study the phylogeography of the species with 293 individuals from 66 populations sampled across its natural range. cpDNA data showed high regional and rangewide haplotypic diversity (h T(cpSSR) ¼ 0.903-0.948) and population differentiation (G ST(RFLP) ¼ 0.700-0.782) with a phylogeographic pattern that indicated extensive historical gene flow via seed dispersal. Haplotypes were not restricted to any of the four varieties, but showed significant geographic structure (G ST(cpSSR) ¼ 0.392; R ST ¼ 0.673; R ST 4R ST (permuted)), with the major division separating East and Southern Africa populations from those in West and Central Africa. Phylogenetic analysis of ITS data indicated a more recent origin for the clade including West and Central African haplotypes, suggesting range expansion in this region, possibly during the Holocene humid period. In conjunction with paleobotanical evidence, our data suggest dispersal to West Africa, and across to the Arabian Peninsula and Indian subcontinent, from source populations located in the East African region during climate oscillations of the Plio-Pleistocene.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plio-Pleistocene history and phylogeography of Acacia senegal in dry woodlands and savannahs of sub-Saharan tropical Africa: evidence of early colonisation and recent range expansion

et al. 2012

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“…Gordo et al (2007) detected almost null differentiation between stands from the Meseta Norte (Spain) provenance. found very low genetic diversity in Pinus pinea using 12 paternally-inherited chloroplast microsatellites (see also Allal et al 2011). Using both nuclear and organelle markers, González (2011) found very low molecular variation in the species, though sufficient to separate eastern (Greece, Turkey, Israel, Cyprus and Lebanon) from western provenances (Spain, France, Italy, Morocco and Tunisia).…”

Section: Introductionmentioning

confidence: 99%

Growth of Stone pine (Pinus pinea L.) European provenances in central Chile

Muñoz¹,

Balzarini²,

Rodriguez³

et al. 2017

iForest

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Pinus pinea is characterized by phenotypic plasticity, tolerance to harsh soils and climates, but low differentiation in growth parameters and low genetic variability. Growth and cone production of six European stone pine provenances (two from Italy, three from Spain and one from Slovenia) were analyzed in a field trial experiment established in central Chile. The study evaluated height, diameter at breast height (DBH) and crown diameter growth of 147 nineteen-year-old trees per provenance, as well as fruiting variables (i.e., number of cones per tree and cone weight). Survival over the first 7 years was also evaluated. Provenances significantly differed in cone number per tree, cone weight, height and DBH growth, and crown diameter growth. Provenances were grouped according to growth and production variables: one group included the Italian and Slovenian provenances, the second group Andalucía and Sierra Morena (Spain), and the third included Meseta Castellana (Spain). Individual cone production was positively correlated with cone weight and other growth variables. Meseta Castellana provenance showed the highest growth and productivity. Our results provide useful information for the selection of P. pinea provenances to be used in new plantations in central Chile.

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“…Numerous studies using this approach indicate that the genetic differentiation of many extant taxa and species ranges were affected by climatic and environmental discontinuities as barriers and Pleistocene glacial/interglacial cycles, most notably in the temperate regions of northern Europe and North America (Carnaval, Hickerson, Haddad, Rodrigues, & Craig Moritz, 2009;Hewitt, 2000). Yet, Pleistocene climatic oscillations have had a profound effect on the distribution, demographic dynamics, and patterns of genetic variation of arid adapted species (Allal et al, 2011;Byrne, 2008;Meng, Gao, Huang, & Zhang, 2015;Riddle & Hafner, 2006;Turchetto-Zolet, Pinheiro, Salgueiro, & Palma-Silva, 2013). In the New World, cyclic range contractions and expansions shaped the current distribution of arid plants, their concomitant population dynamics and genetic differentiation, particularly during the Late Quaternary climatic changes (Collevatti, Rabelo, & Vieira, 2009;Rebernig et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Genetic Differentiation and Fragmentation in Response to Climate Change of the Narrow Endemic Psittacanthus auriculatus

Ornelas

Licona-Vera

Vásquez-Aguilar

2018

Tropical Conservation Science

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The state of Oaxaca is positioned in a rather unique biogeographical position with the highest diversity of vascular plants in Mexico. The isolation of xeric valleys surrounded by complex mountain ranges in Oaxaca supplies an excellent opportunity to investigate the influence of the Pleistocene events on xeric species. To test for the alternative hypotheses of Pleistocene glacial refugia, we used sequences of two chloroplast markers to examine the phylogeographic patterns of the endemic mistletoe species Psittacanthus auriculatus (Loranthaceae) across its known range in Oaxaca and conducted ecological niche modeling (ENM) to explore changes of its distribution range through present, future, and palaeo periods. Our results revealed two groups corresponding to the distribution of individuals/populations from the northern locations (western valleys), and those from southern localities at central valleys of Oaxaca. A significant genetic signal of differentiation, demographic stability, and contraction of suitable habitat during the Last Glacial Maximum predicted by ENMs strongly supported a scenario of habitat fragmentation during the Late Pleistocene. We conclude that the genetic differentiation of P. auriculatus is consistent with a model of range contraction during glacial cycles and expansion during interglacials with no major range changes under future scenarios of climate change. The findings verified the profound effects of Pleistocene climatic fluctuations on this endemic mistletoe species, and the low genetic diversity within populations highlights, paradoxically, the urgency of preserving vulnerable populations of endemic yet parasitic mistletoes.

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Past climate changes explain the phylogeography of Vitellaria paradoxa over Africa

Cited by 56 publications

References 65 publications

Plio-Pleistocene history and phylogeography of Acacia senegal in dry woodlands and savannahs of sub-Saharan tropical Africa: evidence of early colonisation and recent range expansion

Plio-Pleistocene history and phylogeography of Acacia senegal in dry woodlands and savannahs of sub-Saharan tropical Africa: evidence of early colonisation and recent range expansion

Growth of Stone pine (Pinus pinea L.) European provenances in central Chile

Genetic Differentiation and Fragmentation in Response to Climate Change of the Narrow Endemic Psittacanthus auriculatus

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