艾比湖流域过去20年植被物候变化及其对气候和非气候要素的响应OA

Understanding the variation characteristics of vegetation phenology and its response mechanisms to climate warming and wetting in the Ebinur Lake basin is essential for elucidating ecosystem carbon and water cycles in arid regions.Utilizing MODIS EVI time-series data from 2001 to 2021,this study extracted key vegetation phenological parameters in the Ebinur Lake Basin employing the dynamic threshold method.Partial correlation analysis and driver attribution analysis were conducted using temperature and precipitation data.The results revealed the following general trends of vegetation phenology from 2001 to 2021:the start of the growing season was delayed at a rate of 0.17 d/a,the end of the growing season was slightly delayed at 0.06 d/a,and the length of the growing season length was shortened at a rate of-0.42 d/a.However,none of these trends were statistically significant(P>0.05).The relationships between climatic factors and vegetation phenology were complex and exhibited considerable spatial heterogeneity.In certain local areas,the start of the growing season was significantly positively correlated with both temperature and precipitation,whereas the end and length of the growing season were significantly negatively correlated with them(P<0.05).Moreover,vegetation phenology was more sensitive to precipitation than to temperature.While climate warming and wetting served as notable driving effects on phenological variations in some local areas,non-climatic factors,such as land use patterns,irrigation and grazing activities,topography,and soil properties,etc.,had a more pronounced influence across most of the basin.These findings offer a scientific basis for promoting the sustainable and healthy development of inland lake basin ecosystems in arid regions.