西洞庭湖区森林景观指数适宜转换粒度研究

通过对森林景观矢量数据进行矢栅转换，探讨森林景观指数的适宜转换粒度。结果表明： （1）景观指数随粒度变化的情况揭示了景观格局的尺度效应；（2）随着研究粒度的增加，不同景观指数对转换粒度表现出不同的变化规律，景观指数随粒度变化的第一粒度域均为10m-80m；（3）对于适宜研究粒度的选择，在保证计算的质量、较好地体现原始数据的特征信息，同时避免过大的计算工作量，应当在第一尺度域内选择中等偏大的粒度，本研究中景观格局研究的最适宜研究粒度域均为40m-80m；（4）由于森林景观的复杂性、多样化，粒度在景观格局、生态过程中的影响及其尺度效应有待深入研究。

The Appropriate Transformation Grain on Forest Landscape Indices in West Dongting Lake Region

The appropriate Transformation Grain on forest landscape indices are analyzed by vector-grid conversion. The results showed that: (1) the scale effect of landscape pattern is revealed by landscape index with changing of grain; (2) With the grain increasing, the conversion of different landscape indices showed different variation laws, the first landscape indices scale domain are 10m-80m; (3) The choice of appropriate grain can ensure the quality of characteristics of information of landscape patterns and reduce the quantity of calculation, the most appropriate granularity of landscape patterns in West Dongting Lake region are the study of 40m-80m; (4) Due to the complexity and diversity of the forest landscape, grain effect in landscape pattern, ecological processes needs further analyzed.