JIANG Jiuhua1, QI Shi1, HU Jun2, LU Jinsheng2, LI Yue1, JIN Mengli1
1.School of Soil and Water Conservation, Beijing Forestry University, Key Laboratory of Soil and Water Conservation State Forestry Bureau, Beijing 100083, China;
2.Beijing Gardening and Greening Bureau, Beijing 100083, China)
Abstract: The study introduced the Intergrated Valuation of Ecosystem Services and Tradeoffs (InVEST) carbon storage module and evaluated carbon storages of forest ecosystems in the mountainous area of Beijing. The remote sensing image data and the standard plot survey data of the Beijing mountainous area were analyzed by this carbon storage module. The results showed that the average carbon density of all forest ecosystems in Beijing mountainous area was 99.95 Mg/hm2, and average carbon densities of tree layer, shrub layer, herb layer, litter layer and soil layer were 10.51, 3.16, 0.86, 8.61 and 76.81 Mg/hm2, respectively. It was found that the soil carbon density correlated positively and significantly with carbon densities of vegetation and litter. The order of average carbon densities of different types of forest was: deciduous conifer forest (153.99 Mg/hm2) > conifer and broadleaf mixed forest (132.45 Mg/hm2) ＞ deciduous broadleaf forest (125.10 Mg/hm2) ＞ evergreen conifer forest (111.78 Mg/hm2) ＞ shrub forest (72.26 Mg/hm2). The total carbon storage of all forest ecosystems in the Beijing mountainous area was about 77.41 Tg, among which carbon storages of tree layer, shrub layer, herb layer, litter layer and soil layer were 8.14, 2.45, 0.67, 6.67 and 59.48 Tg, respectively. The order of carbon storages of different types of forest was: deciduous broadleaf forest (43.23 Tg) > evergreen conifer forest (25.90 Tg) > shrub forest (6.21 Tg) > conifer and broadleaf mixed forest (1.42 Tg) ＞ deciduous conifer forest (0.65 Tg). The deciduous broadleaf forest and the shrub forest were the main contributors to the carbon storage of forest ecosystems in the Beijing mountainous area, accounting for 55.84% and 33.46%, respectively. The regions with the highest carbon storage and the lowest carbon storage were the Huairou District (15.37 Tg) and the Pinggu District (4.89 Tg), respectively. The carbon storages of forest ecosystems distributed unevenly in the Beijing mountainous area, which was higher in the northern region, then in the western region, and was the lowest in central and eastern regions of the Beijing mountainous area.
Key Words: InVEST model; vegetation carbon; soil carbon; Beijing mountain area
EARTH AND ENVIRONMENT Vol.47, No.3, Tot No.329, 2019, Page 326-335
