基于MSPA与MCR的生态廊道构建及优化研究——以南昌市新建区为例

Study on Construction and Optimization of Ecological Corridor Based on MSPA and MCR:A Case Study of Xinjian District in Nanchang City

以南昌市新建区为例,总体按照“源地识别—廊道构建—生态网络优化”的主线展开,综合运用形态学空间格局分析(MSPA)、景观连通指数模型分析、最小累积阻力模型(MCR)、重力模型等方法进行廊道构建,并对生态网络格局进行布局优化。结果表明:(1)核心区、岛状斑块、孔隙、边缘区、环岛区、桥接区、支线七类景观空间用地中核心区面积最大,为880.62 km^(2),占自然景观面积的73.99%;(2)生态源地共18处,总面积为750.60 km^(2),占核心区的85.24%,主要分布为北部鄱阳湖区域、中西部梅岭国家森林公园及其周边区域,源地类别上主要分为水域和林岭,生态源地之间连通性较好、生境质量较好;(3)阻力呈现由中部向北部、南部减少的趋势,中部阻力最大,由于城市开发建设人类活动以及山体高程影响,对于生物物种的流动产生一定的阻力作用;(4)构建153条生态廊道,总体分布于中部、西南以及北部区域,其中重要生态廊道为52条,基本串联各重要生态源地;(5)构建“2+7”生态核以及“蓝绿”双带,实现山水环抱、山水共融的生态网络格局。

Taking Xinjian District in Nanchang City as example,this study is generally carried out according to the main line of“source identification-corridor construction-ecological network optimization”,comprehensively using methods such as the morphological spatial pattern analysis(MSPA),landscape connectivity index model analysis,minimum cumulative resistance model(MCR),gravity model,etc.and optimize the layout of the ecological network pattern.The results are as followings:(1)The core area is the largest among the seven types of landscape space:core,islet,perforation,edge,loop,bridge,and branch,the area is 880.62 km^(2),accounting for 73.99%of the natural landscape area.(2)The total area of 18 ecological source areas is 750.60 km^(2),accounting for 85.24%of the core area.They are mainly distributed in the northern Poyang Lake region,the central and western Meiling National Forest Park and its surrounding areas.The ecological source areas are mainly divided into water areas and forest ranges.The connectivity between ecological source areas is good,and the habitat quality is good.(3)The resistance shows a decreasing trend from the middle to the north and south,and the resistance in the middle is the largest.Due to the influence of human activities in urban development and construction and mountain elevation,there is a certain resistance to the flow of biological species.(4)Build 153 ecological corridors,which are generally distributed in the central,southwest and northern regions,of which 52 are important ecological corridors,basically connecting the important ecological sources.(5)Build“2+7”ecological core and“blue-green”double belt to realize an ecological network pattern of mountains and rivers embracing and integrating.