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《Acta Ecologica Sinica》 2003-10
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Carbon accumulation and allocation of lower subtropical evergreen broad-leaved forests in a MAB reserve of China

MO Jiang Ming 1, FANG Yun Ting 1, PENG Shao Lin 1, Brown Sandra 2, ZHOU G uo-Yi\+1 (1 South China Institute of Botany, Chinese Academy of Sciences, Zhaoqing, Guan gdong 526070; 2 Winrock International, 1621 N. Kent St., Suite 1200, Arlington , VA 22209, USA).  
The accumulation and distribution of carbon were st udied for two communities of Castanopsis chinensis, Cryptocarya concinna (CC CC, 400 year old) and of Cryptocarya concinna, Lindera chunii (CCLC, 5 0 year old) in a lower subtropical evergreen broad-leaved forest of a MAB bio sp here reserve of China. Carbon concentrations distributed among plant organs and layers in a similar pattern for these two communities, with a mean value (%) of 41 980 in CCCC community and 40 377 in CCLC community. The total carbon standi ng stock in the ecosystem of CCCC community was estimated to be 244 998 t/hm 2. The vegetation component accounted for 62 96 percent of the total (154 289 t/hm 2), while soil (to 60 cm depth) and the standing litter components accou nted for 36 38 percent (89 128 t/hm 2) and 0 66 percent of the total (1 58 1 t/hm 2), respectively. The total carbon standing stock in the vegetation com ponent of CCLC community was estimated to be 84 151 t/hm 2 and was about 54 54 percent of that for CCCC community. In both communities, however, the total c arbon standing stock in the vegetation component was mostly in the tree layer, w ith 97 47 percent of total (150 385 t/hm 2) in CCCC community and 98 04 per cent in CCLC community (82 504 t/hm 2), and woody tissues contained almost ha lf of the total carbon standing stock in the tree layer (47 93% and 44 66% in CCCC and CCLC communities, respectively). Although the community of CCCC was old er than 400 years, its vegetation was still accumulating carbon every year. The total annual carbon accumulation of vegetation component was 3 149 t/(hm 2·a ) in CCCC community and slightly lower than that in CCLC community (3 425 t/(hm 2·a)).
【Fund】: 国家自然科学基金资助项目 ( 39899370 ;;30 2 70 2 83);; 中国科学院知识创新资助项目 ( KZCX2 - 40 7);; 广东省自然科学基金资助项目 ( 0 2 152 4 )~~
【CateGory Index】: S718.5
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