基于连清体系的森林生物多样性监测网络构建研究——以湖南省为例

以南方重点林区湖南省为例,在明确影响森林生物多样性主要环境因素的基础上,通过空间平衡抽样、改进的Whittaker样地设计,构建省级尺度上森林生物多样性监测网络。研究表明:1)与简单随机抽样、系统抽样相比,空间平衡抽样在降低样本点空间关联性、提高抽样效率和抽样精度方面具有明显的优势;2)改进的Whittaker样方设计可以帮助人们更好地分析物种丰富度、平均覆盖度、物种多样性空间分布规律;3)依托于现有的连清体系,采用空间平衡抽样方法进行森林生物多样监测样本构建,采用改进的Whittaker样方设计进行生物多样性调查,可以为省级尺度上的森林生物多样性监测网络的构建探索出一条具有统计学基础且经济适用的途径。

Construction of Forest Biodiversity Monitoring Network Based on Continuous Forest Inventory System:A Case Study in Hunan Province

In this paper,Hunan,a major forest province in Southern China,was chosen as a case study area,while spatially balanced sampling method and modified Whittaker plot design were applied to construct forest biodiversity monitoring network at provincial level after enforcing environmental factors impacting biodiversity were determined.Studies have shown that:1)compared with simple random sampling and systematic sampling,spatially balanced sampling has obviously advantages in reducing spatial autocorrelation and improving sampling efficiency and precision;2)modified Whittaker plot design can better analyze the species richness,average coverage,spatial distribution of species diversity;3)relying on continuous forest inventory system,by using spatially balanced sampling for forest biodiversity monitoring and modified Whittaker plot design for biodiversity survey,an economical affordable practical forest biodiversity monitoring network with statistical basis can be established at provincial level.