景观格局分析空间取样方法及其应用

Spatial Sampling Methods and Their Applications in landscape pattern analysis for landscape ecological research

详细介绍了在关帝山森林景观生态研究中提出的景观格局分析空间取样方法,即统一网格样方取样法和统一网格样点取样法,并介绍了相应的样方数值计算方法。在此基础上,介绍了这两个取样方法在景观空间趋势面分析、景观要素空间关联度分析、景观异质性分析、景观要素空间分布模式检验、景观动态过程模型建立等方面研究中的应用。并阐述了取样方法的有效性及其可能的潜在应用价值。

Because of the comprehensive effects of multiple environmental factors to landscape pattern and ecological processes, mathematical methods are more eagerly needed in landscape ecological researches to explore the general distribution pattern of landscape elements in highly heterogeneous and changing landscape. A great challenge to improve the mathematical landscape pattern analysis is providing a satisfied spatial sampling method. Many quantitative landscape analysis methods cannot be used because lacking of a moderate spatial sampling method. This paper introduces two spatial sampling methods proposed and used in Guandishan forest landscape ecological research. They are Uniform-Grid-Square sampling method and Uniform-Grid-Point sampling method. These sampling methods used to provide data for landscape pattern analysis. The quantification method of sample-square is respectively proposed in the paper. As examples, the usage process of two spatial sampling methods in landscape trend-surface-analysis, landscape element spatial correlation analysis, landscape element dominantness analysis, analysis of landscape element spatial distribution pattern, and landscape dynamic modeling are introduced respectively. Based on the examples, availability of the methods is demonstrated, and the potential usages in other spatial analyses are also prospected.