文献类型：期刊文献

英文题名：Ecosystem carbon (CO2 and CH4) fluxes of a Populus dettoides plantation in subtropical China during and post clear-cutting

作者：Gao, Shenghua[1] Chen, Jiquan[2] Tang, Yuxi[3] Xie, Jing[4] Zhang, Rui[5] Tang, Jie[3] Zhang, Xudong[1]

第一作者：高升华

通信作者：Zhang, Xudong

机构：[1] State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Center for Global Change and Earth Observations [CGCEO], Department of Geography, Michigan State University, East Lansing, MI, 48823, United States; [3] Hunan Academy of Forestry, Changsha, 410004, China; [4] Beijing Forestry University, Beijing, 100083, China; [5] State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, Beijing, 100085, China

年份：2015

卷号：357

起止页码：206-219

外文期刊名：Forest Ecology and Management

收录：EI(收录号：20153501219964);Scopus(收录号：2-s2.0-84940101326)

语种：英文

外文关键词：Floods - Productivity - Carbon dioxide - Greenhouse gases - Carbon - Reforestation - Budget control - Groundwater - Climate change - Harvesting - Soil moisture

摘要：Poplar plantations have widely spread around the world due to its high productivity and adaptability. Clear-cutting is the primary harvesting method for poplar plantation management in southern China. However, the effect of harvesting on ecosystem carbon fluxes limits our ability to estimate its carbon sequestration. A consecutive, three-year observation on ecosystem CO2 and CH4 flux (FCO2 and FCH4) of a Populus dettoides plantation on the floodplain of Yangtze River was made prior and post to the clear-cutting using an eddy-covariance system. We found that clear-cutting turned the ecosystem from a strong carbon sink to a mediate carbon source only in several months, July to next January, after the harvest. The ecosystem turned to a net carbon sink at the beginning of the first growing season following clear-cutting due to the large productivity of understory vegetation in this region. The annual carbon budget was -424.3±52.5g-Cm-2 (95% confidence interval) in the harvesting year, with -53.6±22.8g-Cm-2 the first year and -290.7±34.2g-Cm-2 the second year after clear-cutting. Clear-cutting turned the ecosystem from a net CH4 sink to a net CH4 source after the third month, but during the three years the CH4 emission only balanced out a very small portion (0.3%) of FCO2. In non-inundation periods, FCH4 varied from -0.01 to 0.24mmolm-2d-1, with a mean (±SD) of 0.11±0.08mmolm-2d-1, while it ranged from 0.33 to 4.39mmolm-2d-1 during inundation, with a mean (±SD) of 2.17±1.16mmolm-2d-1. Daily and weekly FCH4 during non-inundation period were highly correlated with ground water table, soil moisture, and friction velocity, while FCH4 during inundation depended on inundation depth. ? 2015 Elsevier B.V.