论文部分内容阅读
帽儿山地区是东北东部山区较典型的天然次生林区,随着天然林保护工程的实施,森林经营管理越来越要求集约化,对天然次生林区的景观格局分析及评价是极其必要的。利用帽儿山林场1∶10000 的林相图(根据1999 年航测照片及1999 年调查材料绘制而成),1∶10000 的土地利用现状图(1999)和实地调查资料,在ARC/INFO 支持下,应用地理信息系统技术,对帽儿山林场各种景观类型的形状指数,破碎化指数进行了分析。自然景观的形状指数,形状破碎化指数均大于人工景观,而景观斑块数破碎化指数取决于斑块数目的多少。其中,天然林受人为干预较小,形状复杂,其形状指数大于人工林;人为控制的景观,如苗圃、农地、采伐迹地等,形状较规则,形状指数较小;天然林的景观斑块数破碎化指数大于人工林,也大于非林地。软阔叶林的景观斑块数破碎化指数最大。图3 参11。
With the implementation of the natural forest protection project, the management and management of the forest are more and more intensive. The analysis and evaluation of the landscape pattern in the natural secondary forest area is extremely necessary. Based on the forest phase diagram of 1:10000 in Maoershan Forest Farm (based on the 1999 aerial photos and 1999 survey material), the land use status map (1999) of 1: 10000 and the field survey data, with the support of ARC / INFO, Using GIS technology, the shape index and fragmentation index of various landscape types in Maoershan Forest Farm were analyzed. Natural landscape shape index, shape fragmentation index are greater than the artificial landscape, and landscape patch number of fragmentation index depends on the number of patches. Among them, the natural forest is less interfered by man and has complex shape, and its shape index is larger than that of the plantation. The artificially controlled landscape such as nursery, farmland and deforestation has a regular shape with a smaller shape index. The number of fragmentation index is larger than plantation, but also larger than non-woodland. The number of landscape patches in the soft broadleaf forest is the highest. Figure 3 Senate 11.