Is the age of plant communities predicted by the age, stability and soil composition of the underlying landscapes? An investigation of OCBILs
Is the age of plant communities predicted by the age, stability and soil composition of the underlying landscapes? An investigation of OCBILs
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DOI：
10.1093/biolinnean/blaa174
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发表时间：
2021-06-01
影响因子：
1.9
通讯作者：
Soltis, Pamela S.
中科院分区：
文献类型：
--
作者：
Cortez, Maria Beatriz De Souza;Folk, Ryan A.;Soltis, Pamela S.
古老的、气候缓冲的、贫瘠的景观（OCBILs）被假设为拥有大量的持久性植物谱系，并预计将在全球不同地区出现，与其他类型的景观穿插在一起。我们测试了植物群落的平均年龄是否与OCBILs上的发生有关，正如气候稳定性和贫瘠土壤环境所预测的那样。利用澳大利亚（7033种）、撒哈拉以南非洲（3990种）和南美洲（44482种）这些地区常见的OCBILs（西南澳大利亚植物区、大开普植物区和campos ruperes）的数字化种子植物发生数据，以及经过修剪以匹配物种发生的系统发育，我们测试了环境数据(当前气候、土壤成分、海拔和气候稳定性)以及这里开发的两个捕捉群落年龄的新指标（平均尖端长度和平均节点高度）。我们的研究结果表明，植物群落年龄受到全球变化的多种环境预测因子的组合影响；与对这些景观的预测相反，我们没有发现OCBIL地区的环境与社区年龄之间有统计学上的强关联。开普区（Cape Floristic Region）是唯一一个与老群落有明显重叠的OCBIL。
Old, climatically buffered, infertile landscapes (OCBILs) have been hypothesized to harbour an elevated number of persistent plant lineages and are predicted to occur across different parts of the globe, interspersed with other types of landscapes. We tested whether the mean age of a plant community is associated with occurrence on OCBILs, as predicted by climatic stability and poor soil environments. Using digitized occurrence data for seed plants occurring in Australia (7033 species), sub-Saharan Africa (3990 species) and South America (44 482 species), regions that comprise commonly investigated OCBILs (Southwestern Australian Floristic Region, Greater Cape Floristic Region and campos rupestres), and phylogenies pruned to match the species occurrences, we tested for associations between environmental data (current climate, soil composition, elevation and climatic stability) and two novel metrics developed here that capture the age of a community (mean tip length and mean node height). Our results indicate that plant community ages are influenced by a combination of multiple environmental predictors that vary globally; we did not find statistically strong associations between the environments of OCBIL areas and community age, in contrast to the prediction for these landscapes. The Cape Floristic Region was the only OCBIL that showed a significant, although not strong, overlap with old communities.