摘要
[目的]探究黑龙江省植被动态变化及其影响因素,为区域生态环境恢复与治理提供科学依据。[方法]基于2000—2020年MODIS NDVI数据,辅以同期气象数据,运用Sen+Mann-Kendall趋势分析、Hurst指数、偏相关分析、残差分析及相对作用分析法,深入解析了黑龙江省植被时空变化特征及其对气候变化和人类活动的响应机制,并定量厘清不同情景下气候变化和人类活动在植被变化过程中的相对作用。[结果](1)2000—2020年黑龙江省NDVI以0.028/10 a(p<0.001)的速率波动增长,具有“西南低,中部和东南高”的空间分布格局且垂直地带性明显,21年间NDVI改善区域面积远大于退化区域面积。研究区NDVI未来变化趋势以持续改善为主,占总面积的82.367%;(2)2000—2020年黑龙江省NDVI与气温、降水和相对湿度呈正相关,与日照时数呈负相关,其中降水对NDVI的影响作用最强。人类活动对NDVI呈积极影响的区域占比89.549%,整体上促进了黑龙江省植被生长;(3)气候变化和人类活动对NDVI变化的相对作用表现出明显的空间异质性,其中气候变化是黑龙江省NDVI改善的主要驱动因素,而人类活动对NDVI退化的作用略高于气候变化,两者基本持平。[结论]近21年来黑龙江省植被状况总体向好发展,其变化受气候变化和人类活动共同影响,未来应因地制宜地提升植被对气候变化的适应性并最大限度减轻人类活动对生态环境的损害。
[Objective]The aim of this study is to explore the dynamic changes of vegetation in Heilongjiang Province and its influencing factors,and to provide a scientific basis for the restoration and management of the regional ecological environment.[Methods]Spatiotemporal variations of vegetation NDVI and its response mechanism to climate change and human activities in Heilongjiang Province were analyzed in depth using method of Sen+Mann-Kendall trend analysis,Hurst index,partial correlation analysis,residual analysis and relative role analysis based on MODIS NDVI data and meteorological data from 2000 to 2020.At the same time,the relative roles of climate change and human activities in the process of vegetation change in different situations were determined quantitatively.[Results](1)NDVI in Heilongjiang Province fluctuated growth at a rate of 0.028/decade(p<0.001)from 2000 to 2020,with a spatial distribution pattern of low in the southwest and high in the central and southeast and obvious vertical zonality,the area of NDVI improvement was much larger than the area of degradation during 21 years.The future trend of NDVI change in the study area is mainly continuous improvement,accounting for 82.367%of the total area.(2)NDVI was positively correlated with temperature,precipitation and relative humidity,and negatively correlated with sunshine hours in Heilongjiang Province from 2000 to 2020,precipitation had the strongest effect on NDVI.the areas where human activities had a positive impact on NDVI accounted for 89.549%of the total area,which promoted the vegetation growth in Heilongjiang Province overall.(3)The relative roles of climate change and human activities on NDVI changes showed obvious spatial heterogeneity,where climate change was the main driver of NDVI improvement in Heilongjiang Province,while the role of human activities on NDVI degradation was slightly higher than that of climate change,and the two were basically equal.[Conclusion]In the past 21 years,the vegetation condition in Heilongjiang Province had generally improved,and its variations had been influenced by both climate change and human activities.In the future,we should improve the adaptation of vegetation to climate change according to local conditions and minimize the ecological damage caused by human activities.
作者
石淞
李文
林晓鹏
翟育涔
丁一书
SHI Song;LI Wen;LIN Xiaopeng;ZHAI Yucen;DING Yishu(College of Landscape Architecture,Northeast Forestry University,Harbin 150040,China)
出处
《水土保持研究》
CSCD
北大核心
2023年第5期294-305,共12页
Research of Soil and Water Conservation
基金
黑龙江省自然科学资助项目(LH2022E001)
中央高校基本科研业务费项目(41421016)
国家自然科学基金项目(42171246)。
关键词
黑龙江省
NDVI
时空变化
气候变化
人类活动
相对作用
Heilongjiang Province
NDVI
spatiotemporal variation
climate change
human activities
relative role
