西洞庭湖区森林景观类型空间关系研究  

Spatial Relationship of Forest Landscape Types in West Dongting Lake Region

作　　者：陈端吕[1] 李际平[2] 宋涛[3] 

机构地区：[1]湖南文理学院资源环境与旅游学院,湖南常德415000 [2]中南林业科技大学,湖南长沙410000 [3]常德市国土资源规划测绘院,湖南常德415000

出　　处：《西北林学院学报》2010年第4期200-204,共5页Journal of Northwest Forestry University

基　　金：国家自然科学基金(30972362);湖南省自然科学基金项目(09JJ6039);湖南省社会科学基金(08JD19)

摘　　要：运用关联度指数、Jaccard指数和相邻度指数分析了西洞庭湖区森林景观类型的空间关系,探讨森林景观空间分布规律。结果表明:(1)景观类型的空间关系体现一定时期内森林景观类型现实存在的空间分布,关联度反映了不同景观要素类型之间的空间相关性及人为活动的作用,相邻度指数能补充提供不同景观要素斑块空间相互邻接关系的细节。(2)阔叶类与经济林类等面积贡献率较大的景观类型,与其他类型的空间关系呈负相关,竹类与其它类型生态竞争性较强,也呈现显著的负相关;(3)阔叶类/杉木类的Jaccard指数最大,反映了阔叶类与杉木类共同出现的机率大;(4)森林景观类型的Jaccard指数总值反映了森林景观类型同其他类型的空间聚集度大小,7种景观类型依次为杉木类>经济林类>阔叶类>松木类>灌木类>竹类>柏木类;(5)在适宜的尺度上能更好体现景观类型的空间关系,取样尺度中以600 m×600 m最理想;(6)空间关系可合理解释景观类型相互作用的功能关系,但具体的驱动因素需结合其它方法进一步讨论。The spatial relationships among forest landscape types in West Dongting Lake region were analyzed by using spatial correlation index, Jaecard index, and neighborhood index. The results showed that （1） spatial correlation index and neighborhood index reflectedl the spatial distribution of forest landscape, the former represented the spatial relationship and the effects of numan activities, and the latter represented the details of mutually spatial adjacency; （2） forest landscape types of larger productivity contribution of area, such as broad-leaf forest and economic forest, had negative relationships with other types; bamboo forest and other types were strongly competitive in ecology, and there were obviously negative correlations among them; （3） the Jaccard index of broad-leafed forest / Chinese fir forest was the largest, reflecting that there was a high probability of co-occurrence between them; （4）the total Jaccard index reflected the size of spatial aggregation index among the types with an order of Chinese fir forest 〉economic forest〉 broadleaf forest 〉 pine forest 〉 shrub forest 〉 Bamboo forest〉 cypress forest; （5） spatial relations of landscape types could only be reflected with appropriate scale, the sampling scale of 600rex 600m being the best. In conclusion, interactions among the landscape types can be reasonably explained by spatial relationships. However, further discussion about definite functional factors are needed.

关 键 词：森林景观类型 空间关系 关联度 Jaccard指数 相邻度 西洞庭湖区 

分 类 号：S731.3[农业科学—林学]