鼎湖山森林演替序列水文过程中总有机碳（TOC）变化规律及其对土壤碳平衡的贡献.pdfVIP

生态环境学报 2009, 18(6): 2300-2307 Ecology and Environmental Sciences E-mail: editor@ Dynamics of total organic carbon (TOC) in hydrological processes and its contributions to soil organic carbon pools of three successional forest ecosystems in southern China 1, 2 1, 3 1 4 QIAO Yuna , YIN Guangcai , LUO Yan , LIU Yan 1. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; 2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China; 3. College of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; 4. Guangxi Soil and Water Conservation Monitoring Section, Nanning 530023, China Abstract: The dynamics of total organic carbon (TOC) in hydrological processes are important for understanding carbon cycling in forest ecosystems. TOC was monitored in precipitation, throughfall, stemflow, litter leachate and runoff in subtropical climax forest ecosystem-monsoon evergreen broad-leaved forest (MBF), and its two successional forests of natural restoration-mixed Pinus mas- sonniana/broad-leaved forest (PBF), and Pinus massoniana forest (PF) at Dinghushan Nature Reserve (DNR) in southern China for 3 years (from April, 2002 to May, 2005). The major results and conclusions are as follows: TOC concentrations and fluxes of through- fall (DTF), stemflow, and litter leachate in PF were higher than those in MBF and PBF. TOC concentrations in dry season were higher than that in rainy season, while TOC fluxes were in