Biome FBC (mg kg-1 soil) BBC (mg kg-1 soil) F:B ratio
Unvegetated ground 192.74de (54.79 ~ 677.99) 24.6d (7.68 ~ 78.72) 3.9bc (2.2 ~ 6.91)
Desert 16.92f (14.4 ~ 19.89) 6.83e (6.1 ~ 7.65) 3.14bcd (2.2 ~ 4.49)
Grassland 215.19de (168.98 ~ 274.03) 62.69cd (50.44 ~ 77.92) 4.03b (3.52 ~ 4.62)
Pasture 632.15bc (288.99 ~ 1382.81) 270.65a (129.07 ~ 567.53) 2.48cde (1.62 ~ 3.8)
Cropland 212.69de (150.35 ~ 300.88) 65.77cd (46.3 ~ 93.42) 3.28bcd (2.89 ~ 3.73)
Shrub 218.14cde (106.01 ~ 448.9) 45.42cd (23.48 ~ 87.85) 4.82b (3.72 ~ 6.25)
Savanna 103.36e (60.62 ~ 176.23) 44.37cd (25.94 ~ 75.92) 1.82e (1.57 ~ 2.11)
Tropical/subtropical forest 451.40bc (362.32 ~ 562.39) 209.96ab (179.03 ~ 246.24) 2.22de (1.87 ~ 2.63)
Temperate forest 258.39de (189.16 ~ 352.95) 53.05cd (38.71 ~ 72.7) 4.92b (4.39 ~ 5.51)
Boreal forest 1234.08b (870.72 ~ 1749.08) 226.37ab (172.79 ~ 296.58) 5.03b (4.23 ~ 5.98)
Tundra 3683.59a (1678.49 ~ 8083.94) 428.37a (236.98 ~ 774.31) 8.6a (6.71 ~ 11.01)
Natural wetlands 329.81cde (194.8 ~ 558.4) 92.58bc (50.99 ~ 168.1) 4.13b (3.5 ~ 4.86)