DOI: 10.1073/pnas.2001018117
论文题名: Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations
作者: Helmstetter A.J. ; Béthune K. ; Kamdem N.G. ; Sonké B. ; Couvreur T.L.P.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期: 51 起始页码: 32509
结束页码: 32518
语种: 英语
英文关键词: Climate change
; Demographys
; Phylogenetics
; Tropical rain forests
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163890
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Helmstetter A.J.,Béthune K.,Kamdem N.G.,et al. Individualistic evolutionary responses of Central African rain forest plants to Pleistocene climatic fluctuations[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(51)