2000—2020年黑龙江省植被时空变化对气候因子响应  

Responses of Temporal and Spatial Changes of Vegetation to Climate Factors in Heilongjiang Province from 2000 to 2020

作　　者：刘智源 李继红[1] LIU Zhiyuan;LI Jihong(College of Forestry,Northeast Forestry University,Key Laboratory of Sustainable Management of ForestEcosystem,Ministry of Education,Harbin 150040,China)

机构地区：[1]东北林业大学林学院,森林生态系统可持续经营教育部重点实验室,哈尔滨150040

出　　处：《森林工程》2024年第1期85-97,共13页Forest Engineering

基　　金：国家自然科学基金项目(32071838)。

摘　　要：以2000—2020年黑龙江省的MODIS NDVI数据、土地利用数据和气象数据作为研究对象,提取出耕地、林地和草地3种主要土地覆盖类型的气温、降水2个气候因子,探究黑龙江省植被覆盖指数(NDVI)近21 a的时空变化和植被变化与气候因子的关系。采用Theil-Sen(泰尔-森)趋势估算和Mann-Kendall(曼-肯德尔)趋势检验、变异系数、Hurst(赫斯特)指数和相关分析等方法,对黑龙江省2000—2020年不同季节、不同植被类型NDVI的时空变化特征及NDVI与温度、降水量的关系进行分析。结果表明,1)近21 a黑龙江省生长季年均NDVI为0.91,高植被覆盖区域主要分布于黑龙江省的中部及南部,NDVI的年内波动变化存在明显的季节特征。2)全省NDVI较为稳定,草地NDVI稳定性最高。3)近21 a黑龙江省NDVI整体呈显著上升趋势,速度为每10 a增加4.7%,其中呈显著增加趋势的区域占全省面积的35.55%(P<0.05),这些区域主要分布在黑龙江省中部、西部和北部。4)未来黑龙江省NDVI整体变化趋势以同向持续变化为主(69.5%),发展趋势可能向退化的恶性方向发展占35.33%,可能向改善的良性方向发展占43.6%。5)黑龙江省的植被和各季节与降水和温度均呈正相关(P<0.05)。由此得到,近21 a黑龙江省植被整体覆盖水平良好,且呈改善趋势。未来植被覆盖变化向良性改善方向的发展趋势为主,气温和降水均对植被变化呈正相关影响。Taking the MODIS NDVI data,land use data and meteorological data of Heilongjiang Province from 2000 to 2020 as the research object,three main types of land cover,farmland,forest land and grassland,and two climate factors,temperature and precipitation,were extracted to explore the spatial and temporal changes of the vegetation cover index(NDVI) in Heilongjiang Province in the past 21 years and the relationship between vegetation changes and climate factors.Using Theil-Sen and Mann-Kendall trend tests,coefficient of variation,Hurst index,and correlation analysis methods,Using Theil Sen trend estimation,Mann Kendall trend test,coefficient of variation,Hurst index,and correlation analysis methods,this study analyzed the spatiotemporal variation characteristics of NDVI in different seasons and vegetation types in Heilongjiang Province from 2000 to 2020,as well as the relationship between NDVI and temperature and precipitation.The results indicated that,1) in the past 21 years,the average annual NDVI of the growth season in Heilongjiang Province had been 0.91,and the high vegetation coverage area was mainly distributed in the central and southern parts of Heilongjiang Province.There were obvious seasonal characteristics of NDVI fluctuations within the year.2) The NDVI in the province was relatively stable,with the highest stability in grassland NDVI.3) In the past 21 years,the overall NDVI in Heilongjiang Province had shown a significant upward trend,with a rate of 4.7% increase every 10 years.The regions showing a significant increasing trend accounted for 35.55% of the province's area(P<0.05),mainly distributed in the central,western,and northern parts of Heilongjiang Province.4) In the future,the overall trend of NDVI in Heilongjiang Province will mainly be continuous changes in the same direction(69.5%),with 35.33% likely to develop towards a malignant direction of degradation and 43.6% likely to develop towards a benign direction of improvement.5) The vegetation and seasons in Heilongjiang Province were positively

关 键 词：黑龙江省 NDVI 气候因子 时空变化 偏相关系数 

分 类 号：Q948[生物学—植物学]