Global monocot diversification: geography explains variation in species richness better than environment or biology

Global monocot diversification: geography explains variation in species richness better than environment or biology
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全球单子叶植物多样化:地理比环境或生物学更好地解释了物种丰富度的变化

DOI:
10.1111/boj.12497
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发表时间:
2016
影响因子:
2.4
通讯作者:
Tang C
Tang C
中科院分区:
生物学2区
文献类型:
--
作者:
Tang C

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单子叶植物占被子植物物种丰富度的四分之一,是经济和文化上最重要的植物之一,包括谷物(草),棕榈,兰花和百合。以前的调查单子叶植物物种多样性的相关性在规模上各不相同,通常集中在多样化的几个驱动因素。在这里,解开相关的单子叶植物多样性,我们重建了一个属级系统发育树(1987年的2713属),并编制了一个广泛的非生物,生物和地理特征的数据库,以评估这些特征的差异是否与巨大的不对称物种丰富度存在于这个分支的属之间。我们的结果支持了几种经典的生物多样性理论,包括物种-面积关系以及纬度和海拔多样性梯度。此外,这些因素之间的相互作用解释了另外10%的变异(相比之下,仅主效应就解释了36%的变异)。我们的结论是,较高的物种丰富度与地理变量,特别是较大的范围和较低的海拔,而不是物理环境或生理。
Monocots account for a quarter of angiosperm species richness and are among the most economically and culturally important plants, including cereals (grasses), palms, orchids and lilies. Previous investigations of correlates of monocot species diversity have varied in scale and usually concentrated on a few drivers of diversification. Here, to disentangle the correlates of monocot diversity, we reconstructed a genus-level phylogenetic tree (1987 of the 2713 genera) and compiled an extensive database of abiotic, biotic and geographical characteristics to assess whether differences in these traits correlate with the vast asymmetrical species richness among genera present in this clade. Our results support several classical biodiversity theories, including species–area relationships, and latitudinal and elevational diversity gradients. Furthermore, interactions among these factors explain an additional 10% of the variation (compared to 36% from the main effects alone). We conclude that higher species richness among monocot genera is associated with geographical variables, especially larger ranges and lower elevations, rather than physical environment or physiology.
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