气候变化领域集成服务门户(CCPortal): Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations

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DOI	10.1073/pnas.2001018117
	Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations
	Helmstetter A.J.; Béthune K.; Kamdem N.G.; Sonké B.; Couvreur T.L.P.
发表日期	2020
ISSN	0027-8424
起始页码	32509
结束页码	32518
卷号	117 期号:51
英文摘要	Understanding the evolutionary dynamics of genetic diversity is fundamental for species conservation in the face of climate change, particularly in hyper-diverse biomes. Species in a region may respond similarly to climate change, leading to comparable evolutionary dynamics, or individualistically, resulting in dissimilar patterns. The second-largest expanse of continuous tropical rain forest (TRF) in the world is found in Central Africa. Here, present-day patterns of genetic structure are thought to be dictated by repeated expansion and contraction of TRFs into and out of refugia during Pleistocene climatic fluctuations. This refugia model implies a common response to past climate change. However, given the unrivalled diversity of TRFs, species could respond differently because of distinct environmental requirements or ecological characteristics. To test this, we generated genome-wide sequence data for >700 individuals of seven codistributed plants from Lower Guinea in Central Africa. We inferred species' evolutionary and demographic histories within a comparative phylogeographic framework. Levels of genetic structure varied among species and emerged primarily during the Pleistocene, but divergence events were rarely concordant. Demographic trends ranged from repeated contraction and expansion to continuous growth. Furthermore, patterns in genetic variation were linked to disparate environmental factors, including climate, soil, and habitat stability. Using a strict refugia model to explain past TRF dynamics is too simplistic. Instead, individualistic evolutionary responses to Pleistocene climatic fluctuations have shaped patterns in genetic diversity. Predicting the future dynamics of TRFs under climate change will be challenging, and more emphasis is needed on species ecology to better conserve TRFs worldwide. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate change; Demographys; Phylogenetics; Tropical rain forests
语种	英语
scopus关键词	adult; article; Central Africa; climate change; demography; ecology; environmental factor; female; gene structure; genetic variability; genetic variation; Guinea; habitat; human; human experiment; major clinical study; male; phylogeny; Pleistocene; refugium; soil; tropical rain forest
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160678
作者单位	Helmstetter, A.J., IRD, DIADE, Univ Montpellier, Montpellier, 34394, France; Béthune, K., IRD, DIADE, Univ Montpellier, Montpellier, 34394, France; Kamdem, N.G., Laboratoire de Botanique Systématique et d'Ecologie, Département des Sciences Biologiques, Ecole Normale Supérieure, Université de Yaoundé, I, B.P. 047, Yaoundé, Cameroon; Sonké, B., Laboratoire de Botanique Systématique et d'Ecologie, Département des Sciences Biologiques, Ecole Normale Supérieure, Université de Yaoundé, I, B.P. 047, Yaoundé, Cameroon; Couvreur, T.L.P., IRD, DIADE, Univ Montpellier, Montpellier, 34394, France
推荐引用方式 GB/T 7714	Helmstetter A.J.,Béthune K.,Kamdem N.G.,et al. Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations[J],2020,117(51).
APA	Helmstetter A.J.,Béthune K.,Kamdem N.G.,Sonké B.,&Couvreur T.L.P..(2020).Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations.Proceedings of the National Academy of Sciences of the United States of America,117(51).
MLA	Helmstetter A.J.,et al."Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations".Proceedings of the National Academy of Sciences of the United States of America 117.51(2020).