Table 2 Carbon storage and carbon density of different forest types in the Zijin Mountain National Forest Park from 1987 to 2019
Year | 1987 | 2002 | 2019 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Type | Area (ha) | Carbon storage | cd* (tC/ha) | Area (ha) | Carbon storage | Cd (tC/ha) | Area (ha) | Carbon storage | cd (tC/ha) | |||
tC | % | tC | % | tC | % | |||||||
Oak (Quercus) | 368.8 | 16,285.4 | 26.0 | 44.2 | 553.8 | 26,947.1 | 33.0 | 48.7 | 518.3 | 31,042.0 | 29.2 | 59.9 |
Formosan gum(Liquidambar formosana) | 102.8 | 3,924.3 | 6.3 | 38.2 | 177.4 | 6,957.6 | 8.5 | 39.2 | 215.9 | 7,895.5 | 7.4 | 36.6 |
Locust (Robinia pseudoacacia) | 155.8 | 5,803.9 | 9.3 | 37.3 | 74.7 | 2,910.3 | 3.6 | 39.0 | 49.4 | 2,266.0 | 2.1 | 45.9 |
Masson pine (Pinus massoniana Lamb.) | 444.4 | 13,180.7 | 21.1 | 29.7 | 215.3 | 8,379.7 | 10.3 | 38.9 | 32.3 | 1,404.0 | 1.3 | 43.4 |
Mixed broadleaves | 395.0 | 12,838.3 | 20.5 | 32.5 | 635.8 | 22,792.4 | 27.9 | 35.8 | 968.9 | 45,601.3 | 42.9 | 47.1 |
Mixed (Conifers and broadleaves) | 126.4 | 3,002.4 | 4.8 | 23.8 | 367.9 | 10,039.0 | 12.3 | 27.3 | 433.4 | 13,507.2 | 12.7 | 31.2 |
Mixed conifers | 173.8 | 6,500.4 | 10.4 | 37.4 | 48.0 | 2,419.7 | 3.0 | 50.4 | 56.2 | 3,065.8 | 2.9 | 54.5 |
Bamboo (Phyllostachys pubescens) | 24.6 | 1,003.3 | 1.6 | 41.0 | 30.7 | 1,257.2 | 1.5 | 41.0 | 36.6 | 1,498.8 | 1.4 | 41.0 |
Total | 1,791.5 | 62,538.7 | 100.0 | Â | 2,103.6 | 81,703.0 | 100.0 | Â | 2,311.0 | 106,280.6 | 100.0 | Â |