A biogeographic perspective on the evolution of fire syndromes in pine trees (Pinus: Pinaceae)
A biogeographic perspective on the evolution of fire syndromes in pine trees (Pinus: Pinaceae)
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DOI：
10.1098/rsos.172412
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发表时间：
2018-03-01
影响因子：
3.5
通讯作者：
Wilson, Joseph S.
中科院分区：
文献类型：
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作者：
Badik, Kevin J.;Jahner, Joshua P.;Wilson, Joseph S.
我们的目标是探索松属生物地理学与火灾适应性综合症进化之间的关系。我们使用先前发表的时间校准的系统发育学并进行祖先性状重建来估计松属多样化的可能时间，并确定火适应性综合症何时在谱系中进化。探索火灾症状的特征保存并研究历史生物地理学；我们使用程序 RASP 构建了祖先状态重建，并估计了程序 BaTS 中火适应特征的保守程度。我们的重建表明，连接北美和亚洲的白令陆桥可能在早期松树进化中发挥了重要作用。我们的估计表明，火灾适应性综合症似乎在新世界类群中进化得更频繁，并且可能与北美主要山脉的隆起有关。我们的数据表明，某些地理上广泛传播的对火的适应反复进化，可能是由于气候和环境的局部变化，而不是由于预先适应的个体的大规模分散事件造成的。
Our goals were to explore the relationship between biogeography and the evolution of fire-adaptive syndromes in the genus Pinus. We used a previously published time-calibrated phylogeny and conducted ancestral trait reconstruction to estimate the likely timing of diversification in Pinus, and to determine when fire-adaptive syndromes evolved in the lineage. To explore trait conservation among fire syndromes and to investigate historical biogeography; we constructed ancestral state reconstructions using the program RASP and estimated the degree of conservatism for fire-adapted traits in the program BaTS. Our reconstructions suggest that the Bering land bridge, which connected North America and Asia, probably played a major role in early pine evolution. Our estimates indicated that fire-adaptive syndromes seem to have evolved more frequently in New World taxa and probably are related to the uplift of major North American mountain ranges. Our data suggest that certain geographically widespread adaptations to fire evolved repeatedly, possibly due to localized changes in climate and environment, rather than resulting from large dispersal events of pre-adapted individuals.