基于GIS的桃山林场森林景观格局研究

以河北省木兰围场国有林场管理局桃山林场施业区内的森林资源为对象,利用GIS技术对其森林景观及分布规律进行分析,结果表明:桃山林场森林景观以混交林为主体,其面积占景观总面积的60.42%,斑块数量占景观斑块总数量的29.01%,优势度达到3.474 5。在斑块规模中,以混交林斑块最大,纯林和荒山荒地也有较大规模,疏林地也有相当规模分布,未成林造林地、宜林沙荒地、灌木林、耕地和其它用地景观规模最小;各类斑块的极差值均较大,斑块大小的分化较强烈。混交林的形状最复杂;其次是未成林造林地、纯林、荒山荒地、灌木林、宜林沙荒地、耕地和疏林地;其它用地的形状规整,边缘形状简单,说明这类景观斑块受人为干较严重。

Research on landscape patterns of forests in Taoshan forest farm based on GIS

Forest resources in working circle of Taoshan forest farm in Hebei Pronvince were taken as objects to analyze theforest landscape and distribution regularities by using GIS technique , the results indicated that mixed forest was the subjectof forest landscape, which area was accounted for 60.42% of total area of the landscape, number of patch was accountedfor 29.01% of total number of landscape patch, and dominance was reached 3.474 5.Mixed forest had the maximal patchsize; pure forest and barren hills had larger patch size ; open forest land had rather patche size; young afforestation land,afforestation suitable for desert land, brush land, cultivated land and othe lands had the minimum ones .All kinds of patchpresented larger difference range with strongly differentiation of patch size .Mixed forest showed the complexest shape ,young afforestation land, pure forest, barren hills, brus land, afforestation suitable for desert land, cultivated land andopen forest land took the second place; other lands had structured shape and simple edge shape , suggested human disturbancewas strongly affected this kind of landscape patch .