摘要
景观生态评价是景观规划、管理、保护的基础。以地貌为基本线索、以植被为标志，建立淮河下游地区的景观生态分类系统（包括６个景观型，２５个景观亚型）。根据景观型之间的相似性与差异性，选取两套指标对各景观亚型进行生态评价。通过评价指标的等级化处理、评价指标权重的确定，计算出各景观亚型的综合评价指数。根据综合评价指数，划分出极危急、危急、正常三种景观生态现状类型。统计结果显示，淮河下游地区生态现状极危急、危急、正常景观面积分别占总面积的２４７％、２５６％、４９７％，表明淮河下游地区景观生态形势非常严峻。
Landscape ecological evaluation is to assess the ecological current situation of landscapes.Its a basis for landscape planning,management and conservation.Based upon geomorphology and vegetation,6 landscape types and 25 landscape subtypes are classified in the Lower Huaihe Valley.According to the similarities and differences between landscape types,two sets of indices are used to appraise landscape subtypes.Through grading and weighting these indices,the composite evaluation index(CEI) is calculated.By CEI,normal landscape (CEI>0 70),critical landscape(0 50<CEI≤0 70) and extremely critical landscape (CEI≤0 50) are identified.The result of statistics reveals the areas of normal landscape,critical landscape and extremely critical landscape respectively account for 24 7%,25 6% and 49 7% of the total area of the Lower Huaihe Valley.This shows landscape ecological conditions are serious and landscape ecological restoration is imminent in the region.
出处
《生态科学》
CSCD
1999年第2期46-52,共7页
Ecological Science
关键词
淮河下游地区
景观生态
the lower Huaihe valley
landscape ecological evaluation
