福建省沙岸基干林带现状及空间分布特征

以福建沙质海岸为研究区,采用森林资源二类调查数据和高分辨率遥感影像等为基础数据源,利用遥感和GIS技术确定了福建省沙质海岸及基干林带的空间分布及特征,定量分析了沙质海岸基干林断带率及断带类型,并对基干林区位内其他土地利用状况进行调查研究。结果表明:福建省沙质海岸约占全省海岸线的1/5,主要分布在闽江河口以南沿岸和岛屿;各地区基干林断带率除福州外普遍偏高,基干林平均断带率49.3%;基干林断带类型主要为建筑、养殖场和农业用地;全省沙质岸线沿海基干林带面积共3 420.1 hm2,平均宽度大体呈现北高南低的特点;全省沙质海岸基干林总量较少,树种相对单一,林分结构不尽合理,生态系统稳定性较差;现有沙岸基干林中商品林面积偏大,且多为集体所有,国有化率仍较低;区位内非林业部门管理的土地中适宜造林的空间十分有限。

The Present Situation and Spatial Distribution of Backbone Forest Belt on Sandy Coast of Fujian Province

Based on the forest resources survey data and High-resolution Remote Sensing Image, we determined the spatial distribution and characteristics of the sandy coast and backbone forest in Fujian Province by integrating RS and GIS technology.The quantitative analysis of discontinuity of backbone forest, discontinuity types and land use condition in the ecological location of coastal backbone forest were investiga-ted.The results indicated that sandy coast in Fujian Province accounted for about 1/5 of the entire province which mainly distributed in the south of Minjiang River and coastal islands.The problem of discontinuous of backbone forest was very serious, the average rate of discontinuity was 49.3%.The main types of broken belts were construction, aquaculture and agricultural land.The area of backbone forest on the coastal sandy land was 3 420.1 hm2 , the width of which tended to be higher in the north, lower in the south.Several problems were founded such as quantity deficiency, relatively single tree species, unreasonable forestry structure and poor stability of ecosystem.There was still much com-mercial forest in the backbone forest.Most of the coastal backbone forest was under collective ownership and proportion of state-owned forest was low.The suitable planting area was very limited in the ecological location of coastal backbone forest outside the forest sector .