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首页> 外文期刊>Ecological research >Species-specific clonality in east Asian island flora: Phylogenetic and environmental constraints
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Species-specific clonality in east Asian island flora: Phylogenetic and environmental constraints

机译：东亚岛屿植物群中特定物种的克隆性：系统发育和环境限制

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Plant clonality is a ubiquitous trait observed in many phylogenetic clades and vegetations across tropical to arctic biomes. However, there is no consensus regarding determinant factors of species clonality; especially in the context of species assembly processes, ecological/evolutionary drivers of clonal growth remain largely unknown. To elucidate macroecological drivers of clonality, we examined phylogenetic conservatism/convergence of clonal growth in Japanese vascular plants and explored the ecological role of clonality. We created a dataset of clonal plants that were classified into phalanx, guerrilla and detachable clonal forms for 3,179 species, along with data regarding species geographical distributions and phylogenies. Then, we tested the association of phylogenetic and environmental factors with species clonality for three life-form groups (fern, herb and woody species), and identified explanatory factors of clonal growth along large-scale environmental gradients. Species clonality was phylogenetically constrained; specifically, for herb and woody species, phylogenetic signals across all the clonal growth forms, or especially the detachable form in ferns, were significant. Moreover, clonal growth of Japanese vascular plants was largely explained by taxonomic levels, and also partly by temperature, soil fertility, and species diversity in the distribution range, suggesting both processes; taxon-dependent evolution of vascular plant clonality and evolutionary convergence of clonality across multiple clades of vascular plants relative to environmental constraints. Our findings demonstrated that species-specific clonal growth, which acts as a trait related to abiotic/biotic niche, contributes to shaping large-scale plant diversity patterns through species sorting along abiotic gradients.
机译：植物克隆性是在热带到北极生物群落的许多系统发育进化枝和植被中普遍存在的特征。但是，关于物种克隆性的决定因素尚无共识。尤其是在物种装配过程中，克隆生长的生态/进化驱动力仍然未知。为了阐明克隆性的宏观生态驱动因素，我们研究了日本维管植物克隆生长的系统进化保守性/趋同性，并探讨了克隆性的生态作用。我们创建了一个克隆植物数据集，将其分类为3179种指节，游击和可分离克隆形式，以及有关物种地理分布和系统发育的数据。然后，我们测试了三个生命形式组（蕨类，草本和木本物种）的系统发育和环境因素与物种克隆性的关联，并确定了沿大规模环境梯度克隆生长的解释性因素。物种克隆性在系统发育上受到限制；具体而言，对于草本和木本物种，跨越所有克隆生长形式，尤其是蕨类植物的可分离形式的系统发生信号都很重要。此外，日本维管植物的克隆生长在很大程度上由分类学水平来解释，在某种程度上也可以由温度，土壤肥力和分布范围内的物种多样性来解释，这表明了这两个过程。维管植物克隆性的分类群依赖性进化和维管植物相对于环境限制跨多个进化枝的克隆性进化收敛。我们的发现表明，与非生物/生物生态位有关的一种特定物种的克隆生长，通过沿非生物梯度对物种进行分类，有助于塑造大规模的植物多样性格局。

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