干旱区研究2024，Vol.41Issue(6)：1010-1020,11.DOI:10.13866/j.azr.2024.06.10
近20a塔里木河流域人类活动及景观生态风险时空变化
Temporal and spatial variations of human activities and landscape ecological risks in the Tarim River Basin,China,during the last 20 years
摘要
Abstract
Human activity is an essential factor in the intensification of regional ecological risk.Hence,it is ur-gent to discuss the impact of human activity intensity(HAI)on the landscape ecological risk.This paper took the Tarim River Basin as the research object.Based on the land use,population spatial distribution,and night light da-ta during five periods from 2000 to 2020,it introduces the comprehensive index of land use degree to improve the evaluation system of HAI and quantitatively evaluates the temporal and spatial changes of landscape ecologi-cal risk(LER)in the basin under robust human activity.Combined with the Copula function and bivariate local spatial autocorrelation model,the spatiotemporal correlation between LER and HAI is revealed.The results showed that(1)The HAI in the Tarim River Basin enhanced markedly in the past 20 years,and extensive human activities were mainly distributed in the oasis areas with rich water resources.The intensity of human activities in the basin increased,with the proportion of low-intensity areas diminished by 17.88%and that of medium-high-in-tensity areas elevated by 3.57%.(2)The overall LER in the Tarim River Basin was characterized by a high sur-rounding area and a low central area,and the high-risk area was mainly distributed in the oasis areas with more frequent human activities.The LER in the basin intensified before 2015,which slowed down after 2010,and grad-ually emerged after 2015.(3)The HAI and LER were positively correlated during the past 20 years,and the posi-tive effect of human activities on LER was enhanced.After 2010,the increasing correlation between the two flat-tened,and a positive effect appeared in the stage of transition from increase to decrease.The H-H cluster area ele-vated in space,and the distribution pattern changed from dispersion to concentration.After 2015,the L-L and H-L cluster areas slowly increased,unlike the L-H cluster areas.The results can provide a scientific reference for the rational use of land resources and protection of the landscape ecology in the Tarim River Basin.关键词
景观生态风险/人类活动/时空关联/塔里木河流域Key words
landscape ecological risk/human activity/spatio-temporal correlation/Tarim River Basin引用本文复制引用
杨荣钦,肖玉磊,池苗苗,穆振侠..近20a塔里木河流域人类活动及景观生态风险时空变化[J].干旱区研究,2024,41(6):1010-1020,11.基金项目
新疆维吾尔自治区重点研发专项(2022B03024) （2022B03024）
国家自然科学基金项目(52269007,51969029) （52269007,51969029）
自治区天山英才计划第三期 （）
