[Ecological benefit evaluation of urban forests in Shenyang City based on QuickBird image and CITYgreen model].
Based on the urban forest coverage data interpreted from QuickBird image (2006) and the CITYgreen model, the benefits of Shenyang urban forest types with different canopy closure in carbon fixation and pollutant removal were investigated by means of sampling strategy. The results showed that the total amount of carbon storage, annual carbon sequestration, annual air pollutant removal, and their corresponding values were 0.51 Tg, 6858.20 Mg x a-1), 556.04 Mg x a(-1) 1.26 x 10(8) Yuan, 1.72 x 10(6) Yuan, and 0.22 x 10(8) Yuan, respectively. Among the urban forest types in Shenyang City, ecological and public welfare forest (E) contributed most to the carbon fixation and air pollutant removal. The carbon density decreased in the order of S (subordinated forest) > L (landscape and relaxation forest) > P (production and management forest) > E > R (road forest), annual carbon sequestration was in the order of P > L > E > S > R, and annual air pollutant removal was in the order of P > L > S > E > R. The carbon density of different urban forest types was closely related to their structural complexity. For the forests with high canopy closure, both the annual carbon sequestration and the annual pollutant removal were high; while for those with lower canopy closure, these two characteristics were dependent on the structural complexity of the forests.
Liu
Chang-Fu
CF
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. liucf898@163.com
He
Xing-Yuan
XY
Chen
Wei
W
Zhao
Gui-Ling
GL
Li
Ling
L
Xu
Wen-Duo
WD
D000393:Air Pollutants / Q000032:analysis; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control; D018533:Biomass; D002244:Carbon / Q000032:analysis*; D002681:China; D002958:City Planning; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods; D014197:Trees / Q000254:growth & development*
D000393:Air Pollutants; D002244:Carbon