中性景观模型与真实景观的一致性

Consistency between neutral landscape models and real landscape

采用RULE和SimMap中性景观模型 ,使其形成模拟景观的图幅大小、景观内各类型数目以及各类型之间的比例等项与真实景观相同 ,通过不同景观指标对中性模型系列的反应 ,看其在多大程度上代替真实景观 .研究发现 ,中性景观模型在斑块数、斑块周长、聚集度、蔓延度以及孔隙度等指标所反映的格局特征方面 ,能很好地代替真实景观 ,而在校正斑块周长面积比、分维数以及边界分布均匀度等指标所反映的格局特征方面 ,并不能很好地代替真实景观 ,说明中性景观模型只能在一定的范围内可以代替真实景观 。

Neutral landscape models (NLM) can provide standards against real landscapes,and are used to describe landscape pattern and process in the past few decades.In this paper,the neutral landscape models RULE and SimMap were tested against a real landscape,and a set of landscape metrics were used to quantify the spatial characteristics of real and simulated patterns.Measurements of some metrics (total number of patches,total perimeter,average patch area,aggregation index,contagion and lacunarity) suggested that definite level of consistency between NLM generated maps and real landscape did exist at landscape or class levels.But,there were also some metrics,such as corrected patch perimeter area ratio,fractal double logged and edge distribution evenness,which didn't show any agreement between the generated maps and real landscape.In all,each NLM had its own strength in representing real landscape,but none of them was perfect.