Effects of multiple environmental factors on CO2 emission and CH4 uptake from old-growth forest soils

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	Effects of multiple environmental factors on CO2 emission and CH4 uptake from old-growth forest soils
	Fang, HJ ; Yu, GR ; Cheng, SL ; Zhu, TH ; Wang, YS ; Yan, JH ; Wang, M ; Cao, M ; Zhou, M
刊名	BIOGEOSCIENCES
	2010
卷号	7 期号:1 页码:395-407
ISSN号	1726-4170
通讯作者	Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
中文摘要	To assess contribution of multiple environmental factors to carbon exchanges between the atmosphere and forest soils, four old-growth forests referred to as boreal coniferous forest, temperate needle-broadleaved mixed forest, subtropical evergreen broadleaved forest and tropical monsoon rain forest were selected along eastern China. In each old-growth forest, soil CO2 and CH4 fluxes were measured from 2003 to 2005 applying the static opaque chamber and gas chromatography technique. Soil temperature and moisture at the 10 cm depth were simultaneously measured with the greenhouse gas measurements. Inorganic N (NH4+-N and NO3--N) in the 0-10 cm was determined monthly. From north to south, annual mean CO2 emission ranged from 18.09 +/- 0.22 to 35.40 +/- 2.24 Mg CO2 ha(-1) yr(-1) and annual mean CH4 uptake ranged from 0.04 +/- 0.11 to 5.15 +/- 0.96 kg CH4 ha(-1) yr(-1) in the four old-growth forests. Soil CO2 flux in the old-growth forests was mainly driven by soil temperature, followed by soil moisture and NO3--N. Temperature sensitivity (Q(10)) of soil CO2 flux was lower at lower latitudes with high temperature and more precipitation, probably because of less soil organic carbon (SOC). Soil NO3- accumulation caused by environmental change was often accompanied by an increase in soil CO2 emission. In addition, soil CH4 uptake decreased with an increase in soil moisture. The response of soil CH4 flux to temperature was dependent upon the optimal value of soil temperature in each forest. Soil NH4+-N consumption tended to promote soil CH4 uptake in the old-growth forests, whereas soil NO3--N accumulation was not conducive to CH4 oxidation in anaerobic condition. These results indicate that soil mineral N dynamics largely affects the soil gas fluxes of CO2 and CH4 in the old-growth forests, along with climate conditions.
学科主题	Ecology; Geosciences ; Multidisciplinary
收录类别	SCI
资助信息	National Key Research and Development Program [2010CB833502]; National Natural Science Foundation of China [30600071, 40601097, 30590381, 30721140307]; Knowledge Innovation Project of the Chinese Academy of Sciences [KZCX2-YW-432, O7V70080SZ, LENOM07LS-01]; GUCAS [O85101PM03]
语种	英语
WOS记录号	WOS:000274058100031
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/53937]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Fang, HJ,Yu, GR,Cheng, SL,et al. Effects of multiple environmental factors on CO2 emission and CH4 uptake from old-growth forest soils[J]. BIOGEOSCIENCES,2010,7(1):395-407.
APA	Fang, HJ.,Yu, GR.,Cheng, SL.,Zhu, TH.,Wang, YS.,...&Zhou, M.(2010).Effects of multiple environmental factors on CO2 emission and CH4 uptake from old-growth forest soils.BIOGEOSCIENCES,7(1),395-407.
MLA	Fang, HJ,et al."Effects of multiple environmental factors on CO2 emission and CH4 uptake from old-growth forest soils".BIOGEOSCIENCES 7.1(2010):395-407.