基于NDVI时间序列数据的河南省植被景观时空变化分析

Spatial-temporal variation analysis of vegetation landscape in Henan Province based on NDVI time series data

基于2010—2019年MOD13Q1数据,结合景观格局理论知识,采用sen+mk趋势分析了2010—2019年河南省植被景观的时空变化规律,并阐明了植被覆盖分布变化趋势与典型植被景观格局指数的响应关系。结果表明,在空间上,河南省植被覆盖呈现由西向东由南向北逐渐降低的分布规律。河南省植被覆盖年均趋势变化总体上为不显著退化。三种景观指数10年间变化趋势增加,植被受干扰程度增加,植被覆盖等级结构发生变化,植被覆盖变化趋势与所选景观指数变化趋势呈负相关。

Vegetation cover is an important indicator of ecological change.Based on MOD13Q1 data from 2010 to 2019 and combined with the knowledge of landscape pattern theory,the spatial and temporal changes in the vegetation landscape of Henan Province from 2010 to 2019 were analyzed using sen+mk trends to analyze the change pattern,and the response relationship between the change trend of vegetation cover distribution and the typical vegetation landscape pattern index was elucidated.The results show that,spatially,vegetation cover shows a distribution pattern of gradually decreasing from west to east and from south to north.The annual average trend change of vegetation cover in Henan Province was generally non-significant degradation.The three landscape indices showed an increasing trend over 10 years,with an increase in vegetation disturbance and a change in vegetation cover hierarchy,and a negative correlation between the change in vegetation cover and the selected landscape indices.