Forest Carbon Storage and Its Dynamic Change in Shenzhen City

Based on the data collected and updated in the 2nd class forest resource inventory of 2005 and 2010 in Shenzhen City, the carbon storage, carbon density and its dynamic change of the forest resource in Shenzhen City between 2005 and 2010 were estimated and analyzed by adopting the successive function method with biomass variable as transfer factor. The analyses indicated that the biomass carbon storage of the forest ecosystem in Shenzhen City in the year of 2010 was 223.95 × 104Mg and whose carbon density at the same time was 2821Mg/hm2, which was respectively increased by 22.57×104Mg and 2.18Mg/hm2 on the basis of 2005, and the annual growth rate of biomass carbon storage was 1.81%. The biomass carbon storage of arbor tree species forest was increased from 13929×104Mg in 2005 to 161.86×104Mg in 2010 with an annual growth rate of 3.24%, and its carbon density was increased from 2932Mg/hm2 in 2005 to 32.17Mg/hm2 in 2010. The carbon storage of arbor tree species forest ecosystem in 2010 was 63896×104Mg, in which the carbon storage in the woodland soil accounted for 74.64%, and the carbon storage of arbor layer, undergrowth vegetation and forest litters accounted for 1925%, 3.48 % and 2.62 %, respectively. The carbon density of arbor forest ecosystem in 2010 was 12687Mg/hm2. The arbor tree species forest in Shenzhen City was mainly composed of young and middleaged plants, whose potential for carbon storage might reach to 6620×104Mg in the future.