Table 4 Six integrative methods to estimate C storage in Chinese grasslands.
From: Carbon storage in Chinese grassland ecosystems: Influence of different integrative methods
Approaches | No. method | Sub-No. | Selected methods | Assumption |
|---|---|---|---|---|
Spatial interpolation | M1 | 1 | Kriging interpolation | Grasslands vary gradually with climate and have a continuous distribution in China. Theoretically, biomass and C storage from one sampling site may be the most similar to these of the nearest site because of more similar hydrothermal conditions. On the basis of this assumption, the methods of spatial interpolation can be used to estimate the C storage of grasslands in China. |
M2 | 2 | Inverse Distance Weighted interpolation | ||
M3 | 3 | Empirical Bayesian Kriging interpolation | ||
Grassland classification | M4 | 1 | 5 grassland types | Grasslands show different characteristics resulting from climate (temperature and precipitation), topography, and soil. Grasslands therefore can be artificially divided into different types to depict the collective characteristics. On the basis of this assumption, C storage in Chinese grasslands can be calculated based on grassland type and corresponding area at different scales. |
M5 | 2 | 18 grassland types | ||
M6 | 3 | 32 grassland subtypes |
