摘要
基于MODIS和国产高分影像数据,应用地理信息系统空间分析方法,选取《区域生态质量评价办法(试行)》中的防风固沙功能指数对辽西北地区的防风固沙生态功能进行评价,并应用皮尔森相关系数和景观格局理论,对防风固沙生态功能的影响因子进行分析。结果表明:2003年-2020年间辽西北地区防风固沙指数总体呈增加趋势,但存在明显的内部空间差异。生态系统防风固沙功能与植被生物量、植被覆盖度和降雨量影响明显.除了自然因素,人工植被比重大,是辽西北地区防风固沙功能低的主要原因。
Using MODIS domestic high resolution image data,with GIS spatial analysis technology,the ecological function in Northwest Liaoning has been evaluated based on the Regional Ecological Quality Evaluation Method(Trial)with the windbreak and sand-fixing index.The influence factors of the ecological function of windbreak and sand fixation were analyzed by using Pearson correlation coefficient and landscape pattern theory.The results show that,in addition to being significantly lower than the provincial average level,there are obvious internal spatial differences in the windbreak and sand fixing function in Northwest Liaoning From 2003 to 2020.The windbreak and sand fixing index in Northwest Liaoning showed an overall increasing trend.The ecological function of windbreak and sand fixation is obviously affected by vegetation biomass,vegetation coverage and rainfall,and the function index of windbreak and sand fixation was positively correlated with NPP and annual rainfall.In addition to natural factors,the large proportion of artificial vegetation is the main reason for the low function of wind protection and sand fixation in Northwest Liaoning.
作者
李杨
袁俊斌
张峥
问青春
丁振军
Li Yang;Yuan Junbin;Zhang Zheng;Wen Qingchun;Ding Zhenjun(Ecological and Environment Monitoring Center of Liaoning Province,Shenyang 110161,China)
出处
《环境科学与管理》
CAS
2023年第8期137-142,共6页
Environmental Science and Management
关键词
辽西北
防风固沙指数
生态功能
NPP
相关分析
northwest Liaoning
windbreak and sand-fixing index
ecological function
NPP
correlation analysis
