Spatio-temporal dynamics of terrestrial Net ecosystem productivity in the ASEAN from 2001 to 2020 based on remote sensing and improved CASA model

作者：Chaoqing Huang, Chuanzhun Sun, MinhThu Nguyen, Qian Wu, Chao He, Huan Yang, Peiyue Tu, Song Hong · 发表于：Ecological Indicators · 年份：2023 · DOI：10.1016/j.ecolind.2023.110920 · 被引用次数：46 · 研究领域：Remote Sensing in Agriculture、Land Use and Ecosystem Services、Remote Sensing and LiDAR Applications

The Association of Southeast Asian Nations (ASEAN) has attracted considerable attention for its rich land ecosystem productivity. However, recent excessive human disturbances may have triggered significant transformations. Consequently, understanding the spatio-temporal dynamics of ecosystem productivity in this region is crucial for strengthening regional ecological sustainability and implementing climate change mitigation strategies. In this study, we harnessed multi-source remote sensing data, an improved CASA model, Theil-Sen Median estimators, Mann-Kendall tests, and Hurst exponent to estimate the net ecosystem productivity (NEP) of the ASEAN region and simulate its spatiotemporal dynamics change. The results showed that the mean annual NEP from 2001 to 2020 in ASEAN was 396.83gC/m2, exhibiting a gradual downward trend. From a spatiotemporal tendency perspective, the areas of NEP decline in the ASEAN region far outweighed the areas of increase, with 60.03% of the total area showing a decrease in NEP, 33.14% showing a boost, and 6.83% showing no significant change. In terms of change persistence, 79.3% of NEP demonstrated anti-persistence, indicating a stronger trend of NEP change reversal. Coupling analysis results indicated that the areas with a future increasing trend of NEP constituted 36.11% of the total area, while areas with no significant future change accounted for 0.08%, areas with a future decreasing trend included 25.21%, and 38.6% of the region exhibited unce...