Table 2.

Root C pools of terrestrial biomes revised from those in table 1 by applying each of the five assumptions detailed in §2.The original data from table 1 are included to allow direct comparisons with the revised figures.

		root C (CR) (Pg)
		assumption
biome	table 1	(i)	(ii)	(iii)	(iv)	(v)
tropical forest	74	123	123	88	148	148
temperate forest	30	49	49	33	55	55
Boreal forest	15	25	25	13	22	22
Mediterranean shrubland	8	8	14	15	15	26
tropical savanna and grassland	23	23	39	112	112	186
temperate grassland	4	4	6	8	8	13
deserts	5	5	8	12	12	21
tundra	1	1	2	3	3	6
crops	1	1	1	1	1	1
total	160	240	268	286	376	477