Effect of Forest Structural Change on Carbon Storage in a Coastal Metasequoia glyptostroboides Stand

Table 2

Carbon storage in the thinned, underplanted, and unthinned treatments (standard deviation in brackets); different letters in the same line indicate there are significant differences among the three treatments (5% level, Duncan test).

Components of carbon storage	Thinned (t C ha^−1)	Underplanted (t C ha^−1)	Unthinned (t C ha^−1)
Vegetation aboveground carbon storage
M. glyptostroboides	95.91 (6.82)^a	97.78 (9.43)^a	60.22 (5.95)^b
Understory wood plant	0.78 (0.15)^b	4.63 (0.64)^a	0.18 (0.03)^c
Herbaceous plant	0.71 (0.11)^a	0.23 (0.03)^b	0.06 (0.01)^b
Sum of aboveground	97.4 (6.27)^a	102.64 (8.29)^a	60.46 (5.17)^b
Vegetation underground carbon storage
M. glyptostroboides	25.71 (3.26)^a	26.20 (2.98)^a	16.21 (3.02)^b
Understory wood plant	0.23 (0.04)^b	2.53 (0.42)^a	0.05 (0.01)^c
Herbaceous plant	0.13 (0.01)^a	0.04 (0.01)^b	0.01 (0.00)^b
Sum of underground	26.06 (1.36)^a	28.77 (2.83)^a	16.27 (1.68)^b
Litterfall	2.14 (0.39)^ab	2.54 (0.32)^a	1.75 (0.08)^b
Soil organic carbon	123.06 (9.71)^ab	135.40 (7.95)^a	118.84 (10.06)^b
Total ecosystem carbon storage	248.66 (16.43)^a	269.35 (21.51)^a	197.32 (19.38)^b