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《Ecology and Environmental Sciences》 2015-11
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Carbon Storage of Tree Layer in Subtropical Evergreen Broadleaf Forests in Laojun Mountain of Sichuan

HE Yunling;GUO Zongfeng;LIU Xuelian;College of Resources Environment & Earth Science,Yunnan University;College of life and food engineering,Yibin University;  
As an importance component in carbon pool and sink in terrestrial ecosystems, forest plays fundamental roles in the process of global carbon cycle and balance. To better understand the significance of carbon sink in the process of future carbon management, this study assessed the carbon capacity in a typical subtropical evergreen broadleaf forest in Laojun Mountain, Sichuan Province. The carbon storage and annual carbon gains in trees were measured in the field, and data acquired from two separate field surveys(in 2012 and 2015) were analyzed with allometric equations. The results showed that for two study plots located at elevation 1 500 m and 1 700 m, the tree layer carbon storage were 142.95 and 138.67 t·hm~(-2), the mean annual increment of tree layer carbon sequestration were 7.45 and 7.11 t·hm~(-2), and the mean annual growth rate of tree layer carbon was 5.83% and 5.68%, respectively. The tree layer carbon storage and mean annual carbon increment in in plot(1 500 m) urveyed this year was larger than the previously investigated plot(1 700 m), suggesting that the tree layer of 1 500 m evergreen broadleaf forest played an important role in the carbon storage in Laojun Mountain. Furthermore, the tree layer carbon storage of 1 500 m evergreen broadleaf forest was mainly contributed by the trees with height ≥10 m(50.54%) and 10 cm ≤ DBH20 cm(40.08%), while that of 1 700 m forests was mainly contributed by the trees with 5 m ≤ height 10 m(56.88%) and 10 cm ≤ DBH 20 cm(48.82%). Since most growth in the forest types occurs in the middle-aged forest stands, these age groupes are considered to have a greater potential to increase the biomass carbon capacity. This significant carbon sink will be further enhanced in the Laojun Mountains with the development and restoration designed to provide specific ecological services
【Fund】: 国家自然科学基金项目(C030501);; 云南大学资环学院科研项目(2013CG009)
【CateGory Index】: S718.5
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