Aggregated spatial distributions of species in a subtropical karst forest, southwestern China

	Aggregated spatial distributions of species in a subtropical karst forest, southwestern China
	Zhonghua Zhang; Gang Hu; Jiedong Zhu; Jian Ni
通讯作者	Jian Ni
	2013
发表期刊	Journal of Plant Ecology
卷号	6 期号:2 页码:131-140
摘要	Spatial distribution patterns of species reflect not only the ecological processes but also the habitat features that are related to species distribution. In karst topography, species distribution patterns provide more specific information about their environments. The objectives of this study are as follows: (i) to analyse and explain the spatial distribution patterns of conspecific trees in an old-growth subtropical karst forest; (ii) to investigate pattern changes at different spatial scales; (iii) to test the spatial pattern similarity (or dissimilarity) between trees at different abundances, diameter at breast height classes, canopy layers and different functional groups (shade tolerance and seed dispersal mode); (iv) to examine whether habitat heterogeneity has an important effect on the species spatial distribution. The spatial distributions of woody species with 20 individuals in a 1-ha subtropical karst forest plot at Maolan in southwestern China were quantified using the relative neighbourhood density O based on the average density of conspecific species in a circular neighbourhood around each species. Aggregated distribution is the dominant pattern in the karst forest, but the ratio of aggregated species in total species number decreases with an increase in spatial scale. Less abundant species are more aggregated than most abundant species. Aggregation is weaker in larger diameter classes, which is consistent with the prediction of self-thinning. Seed dispersal mode influences spatial patterns, with species dispersed by animals being less aggregated than those dispersed by wind and gravity. Other species functional traits (e.g. shade tolerance) also influence the species spatial distributions. Moreover, differences among species habitat associations, e.g. with rocky outcrops, play a significant role in species spatial distributions. These results indicate that habitat heterogeneity, seed dispersal limitation and self-thinning primarily contribute to the species spatial distributions in this subtropical karst forest.
关键词	Functional Trait Habitat Heterogeneity Karst Forest Relative Neighbourhood Density Spatial Distribution
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5093
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
通讯作者	Jian Ni
推荐引用方式 GB/T 7714	Zhonghua Zhang,Gang Hu,Jiedong Zhu,et al. Aggregated spatial distributions of species in a subtropical karst forest, southwestern China[J]. Journal of Plant Ecology,2013,6(2):131-140.
APA	Zhonghua Zhang,Gang Hu,Jiedong Zhu,&Jian Ni.(2013).Aggregated spatial distributions of species in a subtropical karst forest, southwestern China.Journal of Plant Ecology,6(2),131-140.
MLA	Zhonghua Zhang,et al."Aggregated spatial distributions of species in a subtropical karst forest, southwestern China".Journal of Plant Ecology 6.2(2013):131-140.

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