Overall, across the four-year period, grassland AGB demonstrated moderate interannual fluctuations, characterized by a gradual increase in mean biomass and a decline in spatial variability, reflecting an overall trend of increasing biomass and improving spatial uniformity. 3.4.2 Spatial variation Based on the biomass change trends and significance testing from 2019 to 2024 in the Yuanmou Dry-Hot Valley ( Figure 4 ), the AGB of Savanna grasslands exhibits a distinct spatial gradient.
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A study on the remote sensing estimation and spatiotemporal distribution patterns of aboveground biomass in savanna grasslands of the Yuanmou dry-hot valley.
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