摘要
为优化贵阳市花溪区的景观格局,以2008—2018年的花溪区景观为研究对象,采用CA-Markov模型对花溪区未来景观格局进行预测,并使用最小累计阻力模型及热点分析,对区域景观格局进行优化。结果表明:(1)花溪区景观类型主要由乔灌地及耕地构成,2008—2018年间,区域建设用地扩张迅速,景观斑块数量及破碎化程度不断上升,其它景观基数较少。其中草地占比稳步升高,裸地占比总体下降,水体景观的变化则相对平稳。(2)预测模型显示,2018—2028年花溪区建设用地面积仍呈快速扩张趋势,新增建设用地主要集中在高程较低,坡度较缓,并已具备一定建设强度的区域,耕地及乔灌地面积呈下降趋势,草地及裸地面积呈上升趋势,水体面积相对稳定;(3)花溪区景观生态廊道主要分布在山脚山谷线、河流河岸带、大面积林带以及农林交错带等区域。而景观生态廊道主要分布在林带与水系两类景观自身或相互之间的交汇处及林带或水域与建设用地的交汇处。最终以景观生态核心区、景观生态维持区、景观生态恢复区以及景观生态提升区定义并划分出花溪区景观生态优化分区。
By taking Huaxi District in 2008—2018 as the research object,the future landscape pattern of Huaxi District was predicted based on CA-Markov model,and the regional landscape pattern was optimized using the minimum cumulative resistance model and the Getis-Ord Gi Analysis.The results showed that:(1)The landscape type of Huaxi District is mainly composed of arbor irrigation land and cultivated land.During 2008—2018,the construction land expanded rapidly,the number of landscape patches and the degree of fragmentation increased continuously,and other landscape bases were less,among which the proportion of grassland increased steadily,the proportion of bare land decreased generally,and the change of water landscape was relatively stable;(2)The prediction results showed that the construction land area of Huaxi District will expand rapidly from 2018 to 2028,and the newly increased construction land will be mainly concentrated in the area with low elevation and gentle slope,and has a certain construction intensity.The cultivated land and shrub land area will decline,the grassland and bare land area will rise,and the water area will be relatively stable;(3)According to the surface of consumption distance,the landscape ecological corridor in Huaxi District is mainly distributed in the valley line at the foot of the mountain,river bank zone,large-area forest belt and agricultural and forestry ecotone,while the landscape ecological corridor is mainly distributed in the intersection of forest belt and water system,and the intersection of forest belt or water area and construction land.The landscape ecological core area and landscape ecological maintenance area,landscape ecological restoration area and landscape ecological promotion area are defined and divided into Huaxi District landscape ecological optimization zone.
作者
贾语非
王秀荣
JIA Yu-fei;WANG Xiu-rong(College of Forestry in Guizhou University,Guiyang Guizhou 550025,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2020年第6期118-127,共10页
Journal of West China Forestry Science
基金
国家自然科学基金项目(31760228)资助。
作者简介
第一作者:贾语非(1994-),男,硕士研究生,主要从事地景规划与生态修复研究。E-mail:jyf881986@163.com;通信作者:王秀荣(1972-),女,教授,博士生导师,主要从事景观规划与生态修复研究。E-mail:wxr7211@126.com。
