基于地理探测器的宁夏植被覆盖度时空变化及其驱动因素分析

打开文本图片集

中图分类号：Q948 文献标志码：A

Abstract：NingxiaislcatedinthemidleandupperreachesofteYelowRiver.Scientificinvestigationofthetemporalandspatial variationvegeationoveanditsdivgfactorsprovistreticalsuotforataiingteologicalbalaneadgeati torationinNingxia.Inthispaper，basedontheMODISNDVIdatasetfrom2O0lto2O23andnaturalandhumanactivitydataforthe sameperiod，thetmpralandspatialvarationpaesofvegetationovranditsdriversuringthgrowingseasoninesdya areinvestigatedbyusinglikemeta-dichotomy，Hurstindexprediction，andgeo-probes.Thestructureshowedthat：（1）FVCcreased significantly during the growing season（the growth rate was 5. 76% /10a， P<0. 001 ），the area of medium and high coverage increased significantly，and the overallFVC showed a spatial pattern of “South > North > Central”，and the persistent change would be the main directionof theevolutionof thevegetationcover.（2）Drivingfactordetectionesults：evapotranspiration>precipitation>elevation > temperature > population density> GDP > nightime lighting，of which evapotranspiration has an explanatory power of O.61，which is greater thanthatoftheotherfactors，anditisthemaindrivingfactorinfluencingthechangesofFVCinthegrowingseasoninNingxia.Theinteractiondetectionshowedthattheexplanatorypowerofeachfactorinteractionwasgreaterthanthatofsinglefactor，andtheexplanatory power was generally enhanced after the interaction between evapotranspiration and other factors， with q values above 0. 60， among which the q valueof the interaction between evapotranspirationand elevation was thelargest（O.84）.Theresultsof thestudycanprovide scientific support for the ecological protection and high-quality development of Ningxia.

Key Words：fractional vegetation coverage;temporal and spatial variation;trend analysis;driving force

植被作为陆地生态系统中的关键组成部分[1]，在维护生物多样性、调节全球气候以及改善生态环境等诸多方面发挥着至关重要的作用[2]。（剩余17772字）