Sampling origins and directions affect the minimum sampling area in forest plots

物种丰富度 采样(信号处理) 植被(病理学) 抽样设计 生态学 系统抽样 物种多样性 地理 自然地理学 统计 生物 数学 人口 医学 人口学 滤波器(信号处理) 病理 社会学 计算机科学 计算机视觉
作者
C. Y. He,Fan Fan,Xiujuan Qiao,Zhang Zhou,Han Xu,Sheng Li,Jiangling Zhu,Shaopeng Wang,Zhiyao Tang,Jingyun Fang
出处
期刊:Journal of Vegetation Science [Wiley]
卷期号:35 (1) 被引量:1
标识
DOI:10.1111/jvs.13232
摘要

Abstract Questions The minimum sampling area (minimum area) is the smallest space that reflects species composition and characteristics of a plant community. The quantitative concept of minimum area is often estimated using species–area relationships (SARs) and has become the classical foundation for managing protected areas. However, sampling designs to determine the minimum area in different forest types have not been systematically evaluated. Location China. Methods We used tree census data from three forest dynamic plots, each with a size of 25–60 ha, in different climatic zones in China to determine the minimum areas of woody plants and to analyze the effects of species richness and topographic heterogeneity on the minimum areas by changing sampling origin and direction. Results We found that mainly sampling design affects the estimation of woody plant species richness and required minimum area in different forest types. The estimated size of the minimum areas required was several hectares and varied significantly with sampling origin and direction, and showed a difference of approximately 1.5–2 times in the forest plots. Topographic heterogeneity significantly affected the minimum area through changes in species composition. Conclusions Sampling origin and direction should be considered when using SARs to estimate the minimum area and species diversity in communities. Such a comprehensive approach of sampling can contribute to a better understanding of vegetation characteristics and the minimum area required for a conservation census in heterogeneous environments.
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