Drivers of plant species richness and phylogenetic composition in urban yards at the continental scale
Drivers of plant species richness and phylogenetic composition in urban yards at the continental scale
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大陆尺度城市庭院植物物种丰富度和系统发育组成的驱动因素
DOI：
10.1007/s10980-018-0744-7
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发表时间：
2018
影响因子：
5.2
通讯作者：
Trammell, Tara L.
中科院分区：
文献类型：
--
作者：
Padullés Cubino, Josep;Cavender-Bares, Jeannine;Hobbie, Sarah E.;Pataki, Diane E.;Avolio, Meghan L.;Darling, Lindsay E.;Larson, Kelli L.;Hall, Sharon J.;Groffman, Peter M.;Trammell, Tara L.
随着全球城市面积的增加，家庭庭院作为生态系统服务和福祉的潜在贡献者发挥着越来越重要的作用。这些好处在很大程度上取决于植物物种丰富度和组成yards.ObjectivesWe旨在确定驱动植物物种丰富度和系统发育组成的栽培和自发植物群在城市庭院在大陆尺度的因素，方法我们分析了来自六个主要大都市地区的117个私人庭院的种植和自发植物群的植物物种丰富度和系统发育组成在美国.院子里的植物物种丰富度和系统发育组成表示为生物物理和社会经济变量和院子里的特点，使用线性混合效应模型和空间显式结构方程modeling.ResultsExtreme温度在很大程度上决定了院子里的物种丰富度和系统发育组成在大陆尺度。降水量正预测自然丰富度，但负预测耕地丰富度。只有系统发育组成的自发植物群与降水。较低的温度和降水量对所有院子的多样性参数的影响是部分介导的院子面积。在各种社会经济变量中，只有教育水平表现出显着的影响种植系统发育组成conclusionsOur结果支持这一假设，灌溉补偿降水在大陆尺度上驱动种植庭院植物多样性。中上层家庭的社会经济变量对庭院多样性没有明显的影响。这些发现为美国城市植被在全球变化中的适应提供了信息。
ContextAs urban areas increase in extent globally, domestic yards play an increasingly important role as potential contributors to ecosystem services and well-being. These benefits largely depend on the plant species richness and composition of yards.ObjectivesWe aim to determine the factors that drive plant species richness and phylogenetic composition of cultivated and spontaneous flora in urban yards at the continental scale, and how these potential drivers interact.MethodsWe analyzed plant species richness and phylogenetic composition of cultivated and spontaneous flora of 117 private yards from six major metropolitan areas in the US. Yard plant species richness and phylogenetic composition were expressed as a function of biophysical and socioeconomic variables and yard characteristics using linear mixed-effects models and spatially explicit structural equation modeling.ResultsExtreme temperatures largely determined yard species richness and phylogenetic composition at the continental scale. Precipitation positively predicted spontaneous richness but negatively predicted cultivated richness. Only the phylogenetic composition of the spontaneous flora was associated with precipitation. The effect of lower temperatures and precipitation on all yard diversity parameters was partly mediated by yard area. Among various socioeconomic variables, only education level showed a significant effect on cultivated phylogenetic composition.ConclusionsOur results support the hypothesis that irrigation compensates for precipitation in driving cultivated yard plant diversity at the continental scale. Socioeconomic variables among middle and upper class families have no apparent influence on yard diversity. These findings inform the adaptation of US urban vegetation in cities in the face of global change.
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