globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0159314
论文题名:
Coalescent Simulation and Paleodistribution Modeling for Tabebuia rosealba Do Not Support South American Dry Forest Refugia Hypothesis
作者: Warita Alves de Melo; Matheus S. Lima-Ribeiro; Levi Carina Terribile; Rosane G. Collevatti
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2016
发表日期: 2016-7-26
卷: 11, 期:7
语种: 英语
英文关键词: Phylogeography ; Paleoclimatology ; Haplotypes ; Demography ; Population genetics ; Paleogenetics ; Brazil ; Forests
英文摘要: Studies based on contemporary plant occurrences and pollen fossil records have proposed that the current disjunct distribution of seasonally dry tropical forests (SDTFs) across South America is the result of fragmentation of a formerly widespread and continuously distributed dry forest during the arid climatic conditions associated with the Last Glacial Maximum (LGM), which is known as the modern-day dry forest refugia hypothesis. We studied the demographic history of Tabebuia rosealba (Bignoniaceae) to understand the disjunct geographic distribution of South American SDTFs based on statistical phylogeography and ecological niche modeling (ENM). We specifically tested the dry forest refugia hypothesis; i.e., if the multiple and isolated patches of SDTFs are current climatic relicts of a widespread and continuously distributed dry forest during the LGM. We sampled 235 individuals across 18 populations in Central Brazil and analyzed the polymorphisms at chloroplast (trnS-trnG, psbA-trnH and ycf6-trnC intergenic spacers) and nuclear (ITS nrDNA) genomes. We performed coalescence simulations of alternative hypotheses under demographic expectations from two a priori biogeographic hypotheses (1. the Pleistocene Arc hypothesis and, 2. a range shift to Amazon Basin) and other two demographic expectances predicted by ENMs (3. expansion throughout the Neotropical South America, including Amazon Basin, and 4. retraction during the LGM). Phylogenetic analyses based on median-joining network showed haplotype sharing among populations with evidence of incomplete lineage sorting. Coalescent analyses showed smaller effective population sizes for T. roseoalba during the LGM compared to the present-day. Simulations and ENM also showed that its current spatial pattern of genetic diversity is most likely due to a scenario of range retraction during the LGM instead of the fragmentation from a once extensive and largely contiguous SDTF across South America, not supporting the South American dry forest refugia hypothesis.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0159314&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/24983
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Laboratório de Genética & Biodiversidade, ICB, Universidade Federal de Goiás (UFG), Cx.P. 131, Goiânia, GO, Brasil;Laboratório de Macroecologia, Universidade Federal de Goiás (UFG), Campus Jataí, Jataí, GO, Brasil;Laboratório de Macroecologia, Universidade Federal de Goiás (UFG), Campus Jataí, Jataí, GO, Brasil;Laboratório de Genética & Biodiversidade, ICB, Universidade Federal de Goiás (UFG), Cx.P. 131, Goiânia, GO, Brasil

Recommended Citation:
Warita Alves de Melo,Matheus S. Lima-Ribeiro,Levi Carina Terribile,et al. Coalescent Simulation and Paleodistribution Modeling for Tabebuia rosealba Do Not Support South American Dry Forest Refugia Hypothesis[J]. PLOS ONE,2016-01-01,11(7)
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