Species-richness patterns of the living collections of the world's botanic gardens: a matter of socio-economics?
Species-richness patterns of the living collections of the world's botanic gardens: a matter of socio-economics?
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DOI：
10.1093/aob/mcq043
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发表时间：
2010-05-01
期刊：
影响因子：
4.2
通讯作者：
Pautasso, Marco
中科院分区：
文献类型：
--
作者：
Golding, Janice;Guesewell, Sabine;Pautasso, Marco
背景与目的世界各地的植物园都拥有无与伦比的迁地植物多样性。它们反映了两种生物地理格局（正的多样性-面积关系和正的多样性-年龄关系），但在丰富度上与自然不同，具有正的纬度梯度。这些关系是否可以用社会经济因素来解释还不得而知。方法采用(a)控制空间自相关的多元模型和(b)结构方程模型，分析综合样本植物园物种和分类群丰富度与关键生态和社会经济因子的关系。重点结果：随着城镇人口规模和城镇人均国内生产总值的增加，植物园植物种类数量增加。国家植物区系丰富度与植物园物种丰富度无关。人口稠密城镇的植物园往往面积更大，因此可以容纳更丰富的生物收藏品。富裕国家的植物园物种较多，这解释了植物园物种丰富度的正纬度梯度。结论社会经济因素影响了世界各国植物园生物群落物种丰富度的形成格局。
Background and Aims The botanic gardens of the world are now unmatched ex situ collections of plant biodiversity. They mirror two biogeographical patterns (positive diversity-area and diversity-age relationships) but differ from nature with a positive latitudinal gradient in their richness. Whether these relationships can be explained by socio-economic factors is unknown.Methods Species and taxa richness of a comprehensive sample of botanic gardens were analysed as a function of key ecological and socio-economic factors using (a) multivariate models controlling for spatial autocorrelation and (b) structural equation modelling.Key Results The number of plant species in botanic gardens increases with town human population size and country Gross Domestic Product (GDP) per person. The country flora richness is not related to the species richness of botanic gardens. Botanic gardens in more populous towns tend to have a larger area and can thus host richer living collections. Botanic gardens in richer countries have more species, and this explains the positive latitudinal gradient in botanic gardens' species richness.Conclusions Socio-economic factors contribute to shaping patterns in the species richness of the living collections of the world's botanic gardens.