辽河流域NDVI时空演变特征及其气候响应性  

Spatiotemporal variation and climate responsiveness of NDVI in Liaohe River Basin

作　　者：杨孟秋 朱玲[2] 王睿 胡振国[1] YANG Mengqiu;ZHU Ling;WANG Rui;HU Zhenguo(School of Architecture and Urban Planning,Shenyang Jianzhu University,Shenyang 110168,China;School of Architecture,Tianjin University,Tianjin 300072,China)

机构地区：[1]沈阳建筑大学建筑与规划学院,沈阳110168 [2]天津大学建筑学院,天津300072

出　　处：《生态学杂志》2025年第4期1321-1333,共13页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(52078307)资助。

摘　　要：全球气候变化会对区域植被变化产生影响。研究流域植被NDVI的时空变化及其对气候变化的响应能够为区域生态环境建设及管理提供重要依据。基于地理微域分异视角,本研究构建了具有辽河流域(辽宁段)特色的地理单元,运用GIS等软件对2000—2022年MODIS-NDVI遥感数据以及相应时期的气温和降水数据进行了分析,借助Theil-Sen+Mann-Kendall、变异系数和偏相关分析方法,分析不同地理单元生长季NDVI的时空变化特征及其对气候的响应。结果表明:不同地理单元生长季NDVI均值呈增长趋势但增速不同,具有明显的空间异质性;结合变化趋势显著性及变异系数分析,平缓阳/阴坡淋溶土与植被具有正向交互作用,适宜多种植被类型生长;平缓阳/阴黑土的植被已经得到了较好的恢复,但仍有部分区域退化;斜陡阳/阴坡淋溶土的植被群落结构较稳定;各单元植被NDVI与气温的显著相关性较低,与降水呈显著正相关。研究结果可为辽河流域(辽宁段)植被恢复潜力评价、生态修复分区及管理提供参考。Global climate change would affect regional vegetation changes.Clarifying the spatiotemporal variations of normalized difference vegetation index(NDVI)in a basin and its response to climate change can provide important insights into regional ecological environment construction and management.Based on the perspective of geographical micro-regional differentiation,we constructed geographical units with characteristics of Liaohe River Basin(Liaoning section).GIS and other software were used to analyze the MODIS-NDVI remote sensing data acquired from 2000 to 2022.The data of temperature and precipitation were collected during the same period.The methods of Theil-Sen+Mann-Kendall test,coefficient of variation and partial correlation analysis were employed to identify the spatiotemporal patterns and climate responsiveness of NDVI during the growing season in different geographical units.The average NDVI during the growing season in different geographical units showed an increasing trend,but with different growth rates and obvious spatial heterogeneity.The analysis of trend significance and variation coefficients showed that gentle slope luvisols on sunny/shady slopes had a positive interaction with vegetation,indicating that they are suitable for the growth of various vegetation types.Vegetation on gentle slope phaeozems had been restored to a good level,but there were still some areas with degradation.Plant community structure on steep slope luvisols on sunny/shady slopes was in a relatively stable state.NDVI in different geographical units had a weak correlation with temperature,and a significant positive correlation with precipitation.Our findings provide references for evaluating potential vegetation restoration as well as ecological restoration zoning and management in Liaohe River Basin(Liaoning section).

关 键 词：地理单元 辽河流域 归一化植被指数 植被变化 气候因子 

分 类 号：Q948[生物学—植物学]