首页|海南尖峰岭热带山地雨林物种多样性空间分布格局的尺度效应

海南尖峰岭热带山地雨林物种多样性空间分布格局的尺度效应

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物种多样性的空间分布格局和维持机制是群落生态学的基本问题。为了探讨海南尖峰岭地区物种多样性空间分布格局的尺度效应，以海南尖峰岭热带山地雨林60 hm2样地为研究对象，分析了物种丰富度、物种多度、Shannon-Wiener指数、Simpson指数以及Pielou均匀度指数随6个空间取样尺度(5 m ×5 m、10 m ×10 m、20 m ×20 m、40 m ×40 m、100 m ×100 m、200 m ×200 m)的变化。结果表明：相比Simpson指数和Pielou均匀度指数，物种丰富度、多度以及Shannon-Wiener指数具有更为明显的空间尺度效应；物种丰富度的方差随取样尺度增加呈现单峰分布特征，并且在20 m ×20 m尺度上达到最大值，而物种多度的方差随取样尺度的增加而增大；物种丰富度和多度的正相关性随着取样尺度的增加逐渐减小甚至消失，这可能与随取样尺度增加生境异质性增加有关；取样尺度对3个物种多样性指数空间分布的影响可能与研究区域内稀有种的组成有关。
Scale-dependent spatial patterns of species diversity in the tropical montane rain forest in Jianfengling, Hainan Island, China
Aims Spatial distribution patterns and formation mechanisms of species diversity are fundamental issues in community ecology. The objectives of this study are to assess the species diversity patterns at the different spatial scales in Jianfengling, Hainan Island, China. Methods Based on the dataset from the 60 hm2 plot in the tropical montane rain forest in Jianfengling, Hainan Island, the spatial distribution patterns of species richness, species abundance, Shannon-Wiener, Simpson and Pielou’s evenness indices were analyzed at six spatial scales, including 5 m × 5 m, 10 m × 10 m, 20 m × 20 m, 40 m × 40 m, 100 m × 100 m, and 200 m × 200 m, respectively. Important findings Results showed that spatial distribution patterns of species richness, species abundance and Shannon-Wiener index were much more obviously changed with the spatial scales than Simpson and Pielou’s evenness indices. Change of variance of the species richness with the increase of spatial scales was unimodal, which had the maximum value at the 20 m × 20 m scale. Variance of the species abundance showed a linear rela-tionship with the increase of spatial scales. The positive relationship between species richness and abundance gradually decreased and even disappeared with the increase of sampling scales, which may be correlated with the increase of habitat heterogeneity. The effects of spatial scales on Shannon-Wiener, Simpson, and Pielou’s even-ness indices may be also correlated with the composition of rare species in the plot.

HainanJianfenglingtropical montane rain forestspecies diversitysampling scalespatial distri-bution patterns

李艳朋、许涵、李意德、骆土寿、陈德祥、周璋、林明献、杨怀

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中国林业科学研究院热带林业研究所，广州 510520

中国林业科学研究院热带林业研究所试验站，海南乐东 572542

海南 尖峰岭 热带山地雨林 物种多样性 取样尺度 空间分布格局

国家自然科学基金中央级公益性科研院所基本科研业务费专项中央级公益性科研院所基本科研业务费专项中央级公益性科研院所基本科研业务费专项国家林业局林业公益性行业科研专项

41201192CAFYBB-2011004RITFYWZX201204RITFYWZX200902201104057

2016

10.17521/cjpe.2015.0400

植物生态学报
中国科学院植物研究所　中国植物学会

植物生态学报

CSTPCDCSCD北大核心
影响因子：2.162
ISSN：1005-264X
年,卷(期)：2016.40(9)
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