生态科学2025，Vol.44Issue(5)：1-12,12.DOI:10.14108/j.cnki.1008-8873.2025.05.001
海南尖峰岭64hm2次生林大样地物种多样性及其与地上生物量的关系
Spatial distribution pattern of species diversity and its relationship with aboveground biomass in a 64 hm2 plot of secondary tropical montane rainforest in Jianfengling,Hainan
摘要
Abstract
Hainan is the hotspot of biodiversity conservation in the world,because of the rich plant resources and high species diversity.Tropical montane rainforest is the largest vegetation type of the tropical forests in Hainan,but it is dominated by large areas of secondary forests.To assess the spatial distribution pattern of species diversity and its relationship with aboveground biomass in the secondary tropical montane rainforest,the basic information of species in 64 hm2 plot of secondary tropical montane rainforest in Jianfengling,Hainan was investigated.The differences in spatial distribution characteristics of species diversity indices at six quadrat sizes were analyzed,and the relationship between species diversity and aboveground biomass at six quadrat sizes was discussed.The results showed that:(1)From the perspective of species richness,abundance and Shannon-Wiener index,their spatial distribution showed significant scale dependence,while the scale dependence of Simpson index and Pielou's evenness index was not obvious.The relationship between species richness and abundance changed gradually from positive to negative with the increase of sampling scales,and finally the relationship was no longer significant at 200 m×200 m scale.(2)Variance of species richness showed a unimodal distribution,increased sharply at the sampling scale of less than 20 m×20 m,then increased slowly,and the maximum value appeared at the scale of 40 m×40 m.With the increase of spatial scales,variance of the species abundance increased linearly,but the variance and coefficient of variation of the remaining indices decreased linearly.(3)In addition to the Pielou's evenness index,the remaining species diversity indices were positively correlated with aboveground biomass at the small and medium scales,and had no linear relationship with aboveground biomass at the large scales.And the Pielou's evenness index was negatively correlated with aboveground biomass at the 5 m×5 m scale,and positively correlated at the 10 m×10 m scale.In summary,the spatial distribution pattern of species diversity and its relationship with aboveground biomass in the secondary tropical montane rainforest were obviously affected by the spatial scales.Compared with the nearby primary forests,the secondary tropical montane rainforest had obvious biological homogeneity at the local scale.关键词
地上生物量/尺度效应/热带山地雨林次生林/空间分布格局/物种多样性Key words
aboveground biomass/scale effect/secondary tropical montane rainforest/spatial distribution pattern/species diversity分类
生物科学引用本文复制引用
雷婕,许涵,李艳朋,陈洁,李善元,钟育飞,陈江..海南尖峰岭64hm2次生林大样地物种多样性及其与地上生物量的关系[J].生态科学,2025,44(5):1-12,12.基金项目
国家自然科学基金项目(U22A20449) （U22A20449）
中国林业科学研究院基本科研业务费专项(CAFYBB2020QB003) （CAFYBB2020QB003）
