应用生态学报2024，Vol.35Issue(8)：2206-2216,11.DOI:10.13287/j.1001-9332.202408.025
西北干旱区绿洲时空变化及驱动力
Spatiotemporal variation and driving factors of oases in the arid region of Northwest China
摘要
Abstract
Based on Landsat images and digital elevation model data during 2000-2020,we investigated the spatio-temporal variations and driving forces of oases in the arid region of Northwest China,using an object-oriented method for oasis classification,and employing trends analysis,centroid migration,and geographic detectors methods.The results showed that from 2000 to 2020,the oasis area in the arid region of Northwest China exhibited a linear increasing trend,with a rate of 1079.66 km2·a-1.The growth rate of oasis area,from highest to lowest,was Alxa,Southern Xinjiang,Hexi Corridor and Northern Xinjiang,respectively.Oases in the arid region of Northwest China were mainly distributed in bands or dots along the northern and southern foothills of Tianshan Mountain,Kunlun Mountain,the northern foothills of Qilian Mountain,and the Alxa Plateau.The oasis area in Northern Xinjiang increased while that in the south decreased.Oases in Southern Xinjiang mainly expanded along rivers,with some edges experiencing recession.Expansion and recession of oases in the Hexi Corridor occurred along the rivers in the northwest.Alxa oasis expanded in a scattered pattern with no significant recession areas.The centroids of oases in Northern and Southern Xinjiang generally shifted northeastward,while that in the Hexi Corridor moved northwest-ward.The centroid of Alxa oasis fluctuated in a north-south direction.The interpretations of agricultural production potential for spatial differentiation of oases in Northern Xinjiang and the Hexi Corridor were the most significant,at 43.6％and 45.3％respectively.Precipitation was the strongest environmental factor affecting Alxa oasis distribu-tion,with an interpretation of 27.6％.Soil types were the strongest factor affecting the distribution of oases in Sou-thern Xinjiang,with an interpretation of 44.9％.The interaction among human activities in oases in the arid region of Northwest China was mainly enhanced by two factors,while the interaction among natural factors was enhanced by both two factors and nonlinear enhancement.关键词
绿洲/时空特征/地理探测器/驱动力/西北干旱区Key words
oasis/spatiotemporal characteristics/geo-detector/driving factor/arid region of Northwest China引用本文复制引用
焦岩,闫峰,卢琦,王艳姣..西北干旱区绿洲时空变化及驱动力[J].应用生态学报,2024,35(8):2206-2216,11.基金项目
本文由中央级公益性科研院所基本科研业务费专项(CAFYBB2023ZA009,CAFYBB2018ZA004)资助. （CAFYBB2023ZA009,CAFYBB2018ZA004）
