内蒙古高原东南缘森林-草原交错带景观格局研究  

Landscape pattern of the forest-steppe ecotone on the southeastern edge of the Inner Mongolia Plateau

作　　者：杜梦婷[1] 侯建华[2] 林皓波[2] 祃来坤[1] 刘建平[1] 李生艳[3] 

机构地区：[1]河北农业大学动物科技学院,河北保定071000 [2]河北大学,河北保定071002 [3]河北省保定市回民中学,河北保定071000

出　　处：《河北农业大学学报》2015年第2期37-42,共6页Journal of Hebei Agricultural University

基　　金：国家自然科学基金(41201327);河北省自然科学基金(C2012204087);河北大学自然科学研究项目(2014-299)资助

摘　　要：为揭示内蒙古高原东南缘森林-草原交错带景观格局,利用美国陆地卫星(Landsat5)Tm遥感影像,采用尺度占优聚合后多尺度分析各景观指数的方法,筛选确定交错带景观特征尺度,并在特征尺度下对交错带景观格局进行分析。结果表明:在选取的12个景观指数中,有9个景观指数随尺度变化而呈现有规律的上升或下降趋势且拐点十分明显,其中有6个景观指数在510m处发生转折,景观在510m尺度处具有等级结构,510m为交错带景观特征尺度。特征尺度下交错带景观格局表现为其他类型(包括裸地、居民区、公路等)面积最大,其次是阔叶林、针叶林和草地,水体面积最小;斑块形状复杂性依次为阔叶林>针叶林>草地>水体>其它;森林斑块数量大,为研究区景观斑块的主体,具有一定的景观基底性质;景观聚集程度高,蔓延度低,破碎化程度低;景观以少量较大斑块为主体,同时还包含很多小斑块,景观类型较单一;水体数量少且面积小,破碎化程度最低。To reveal the landscape pattern of forest-steppe ecotone on the southeastern edge of the Inner Mongolia Plateau, we analyzed the landscape pattern in characteristic scale chosen by Tm of Landsat5 in the southeastern edge of the Inner Mongolia Plateau forest-steppe eco- tone which is analyzed by the landscape index after adopting scale dominant aggregation. The results show that there are 9 landscape indexes in the range of 12 landscape indexes chosen changed with scale,among which 6 landscape indexes turning point occurred at 510 m where the landscape obviously has hierarchy structure and which is the characteristic scale. In the characteristic scale, the landscape pattern in characteristic scale showed other types, including bare land, residential areas, roads, etc. , and their areas are the largest, followed by broad-leaved forest, coniferous forest and grassland, but water area was the smallest. The complex- ity of LSI sequence was broad-leaved forest 〉 coniferous forest〉grassland〉 water body〉 other. The number of forest landscape patch was large, which is the main area in landscape patches researched and have a certain nature of the landscape matrix. The fragmentation of landscape and the contagion was low. However, the AI was high in the study area. The big- ger patches are the subjects of the landscape which also include a lot of small patches. Be- sides, the type of the landscape is not only comparatively simple, but the quantities and area of water body are small together with the lowest degree of fragmentation.

关 键 词：景观格局 特征尺度 景观指数 森林-草原交错带 

分 类 号：Q948.15[生物学—植物学]