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[2,3] Tang, Yuxi[4] Xie, Jing[5] Zhang, Rui[6] Tang, Jie[4] Zhang, Xudong[1]

第一作者：高升华

通信作者：Zhang, XD[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Michigan State Univ, Ctr Global Change & Earth Observat CGCEO, E Lansing, MI 48823 USA;[3]Michigan State Univ, Dept Geog, E Lansing, MI 48823 USA;[4]Hunan Acad Forestry, Changsha 410004, Hunan, Peoples R China;[5]Beijing Forestry Univ, Beijing 100083, Peoples R China;[6]Chinese Acad Sci, State Key Lab Urban & Reg Ecol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

年份：2015

卷号：357

起止页码：206-219

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000364892400021)】；

基金：This site is supported by the US-China Carbon Consortium (USCCC). This research is funded by the National Science & Technology Pillar Program Projects (2015BAD07B04; 2015BAD07B07). Junshan District Bureau of Forestry and Ecology helped in station maintenance, Daoping Xiong helped in data collection; Gabriela Shirkey edited an early version of the manuscript.

语种：英文

外文关键词：GHG flux; Carbon balance; Eddy covariance; Poplar plantation; Harvest effect; Forest regeneration

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 (F-CO2 and F-CH4) 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 +/- 52.5 g-C m(-2) (95% confidence interval) in the harvesting year, with -53.6 +/- 22.8 g-C m(-2) the first year and -290.7 +/- 34.2 g-C m(-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 F-CO2. In non-inundation periods, F-CH4 varied from -0.01 to 0.24 mmol m(-2) d(-1), with a mean (SD) of 0.11 +/- 0.08 mmol m(-2) d(-1), while it ranged from 0.33 to 4.39 mmol m(-2) d(-1) during inundation, with a mean (+/- SD) of 2.17 +/- 1.16 mmol m(-2) d(-1). Daily and weekly F-CH4 during non-inundation period were highly correlated with ground water table, soil moisture, and friction velocity, while F-CH4 during inundation depended on inundation depth. (C) 2015 Elsevier B.V. All rights reserved.