[Characterization of Spatial and Temporal Changes in Net Primary Productivity of Vegetation in Beijing-Tianjin-Hebei Region and Analysis of Influencing Factors].
摘要
were mainly concentrated in the urban areas of the southeastern plains and the beach area of Bohai Sea Rim. ② During the study period, the fluctuation of NPP changes in the BTH Region was small, with lower and medium fluctuations dominating, while the areas of high and very high fluctuations were concentrated in the southern part of the Bashang Plateau in Northwest Hebei and the intermountain basins. ③ The NPP annual mean increased significantly and slightly, accounting for 66.79% and 19.10% of the area, respectively. The trend of future changes was mainly "from increasing to decreasing, " with an area share of 62.63%, followed by a "continuous increase, " with an area share of 24.41%. ④ Slope was the dominant factor in the change of NPP in the BTH Region during the study period, followed by temperature, elevation, and precipitation. Additionally, the interaction combination of precipitation and other influencing factors had a notable effect on NPP changes. The study results can provide a scientific basis and reference for developing future ecological protection policies and implementing ecological projects in the study area.