title: [Point pattern analysis of different age-class Taxus chinensis var. mairei individuals in mountainous area of southern Anhui Province].
abstract: By using O-ring statistics in point pattern analysis and Programita software, this paper studied the spatial distribution patterns and associations of different age-class individuals of Taxus chinensis var. mairei populations at Xianyu and Xiaxiang in the mountainous area of southern Anhui Province. The Xianyu population had a random spatial distribution at the scales from 2 m to 25 m but a clumped distribution at the scales < 2 m, while the Xiaxiang population distributed randomly at all the scales. As for Xianyu population, its individuals of age-class I had a clumped distribution at the scales < 5 m, while the individuals of elder age-classes tended to be non-randomly distributed at more scales than < 5 m, which might be related to the features of population regeneration. With increasingly enlarged age-class differences, the spatial association between younger and elder age-classes individuals turned to be negative, but less spatial association was observed between adjacent age-classes individuals. Such a spatial relationship between different age-classes individuals of T. chinensis was beneficial to the effective use of resources. With the growth of the individuals, T. chinensis population had a transition from clumped to random distribution.
authors.affiliation: Anhui Province Higher Education Key Laboratory of Biotic Environment and Ecological Safety/Anhui Province Key Laboratory of Conservation and Employment of Biological Resources, Anhui Normal University, Wuhu 241000, Anhui, China. wl830126@sina.com
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Qi-Wu
authors.initials: QW
authors.lastname: Sun
authors.forename: Chao-Yun
authors.initials: CY
authors.lastname: Hao
authors.forename: Sheng-Ni
authors.initials: SN
authors.lastname: Tian
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Zhang
authors.forename: Yi-Kun
authors.initials: YK
authors.lastname: Chen
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Zhang
mesh_terms: D044822:Biodiversity; D002681:China; D003247:Conservation of Natural Resources; D017753:Ecosystem; D011157:Population Dynamics; D020946:Taxus / Q000145:classification* / Q000254:growth & development*