NWIPB OpenIR
Diurnal and Seasonal Variations in the Net Ecosystem CO2 Exchange of a Pasture in the Three-River Source Region of the Qinghai-Tibetan Plateau
Wang, Bin1,2; Jin, Haiyan1; Li, Qi3; Chen, Dongdong3; Zhao, Liang3; Tang, Yanhong4; Kato, Tomomichi5; Gu, Song6
2017-01-27
发表期刊PLOS ONE
卷号12期号:1
文章类型Article
摘要Carbon dioxide (CO2) exchange between the atmosphere and grassland ecosystems is very important for the global carbon balance. To assess the CO2 flux and its relationship to environmental factors, the eddy covariance method was used to evaluate the diurnal cycle and seasonal pattern of the net ecosystem CO2 exchange (NEE) of a cultivated pasture in the Three-River Source Region (TRSR) on the Qinghai-Tibetan Plateau from January 1 to December 31, 2008. The diurnal variations in the NEE and ecosystem respiration (R-e) during the growing season exhibited single-peak patterns, the maximum and minimum CO2 uptake observed during the noon hours and night; and the maximum and minimum R-e took place in the afternoon and early morning, respectively. The minimum hourly NEE rate and the maximum hourly R-e rate were -7.89 and 5.03 mu mol CO2 m(-2) s(-1), respectively. The NEE and R-e showed clear seasonal variations, with lower values in winter and higher values in the peak growth period. The highest daily values for C uptake and R-e were observed on August 12 (-2.91 g C m(-2) d(-1)) and July 28 (5.04 g C m(-2) day(-1)), respectively. The annual total NEE and R-e were -140.01 and 403.57 g C m(-2) year(-1), respectively. The apparent quantum yield (alpha) was -0.0275 mu mol mu mol(-1) for the entire growing period, and the alpha values for the pasture's light response curve varied with the leaf area index (LAI), air temperature (T-a), soil water content (SWC) and vapor pressure deficit (VPD). Piecewise regression results indicated that the optimum T-a and VPD for the daytime NEE were 14.1 degrees C and 0.65 kPa, respectively. The daytime NEE decreased with increasing SWC, and the temperature sensitivity of respiration (Q(10)) was 3.0 during the growing season, which was controlled by the SWC conditions. Path analysis suggested that the soil temperature at a depth of 5 cm (T-soil) was the most important environmental factor affecting daily variations in NEE during the growing season, and the photosynthetic photon flux density (PPFD) was the major limiting factor for this cultivated pasture.
WOS标题词Science & Technology
DOI10.1371/journal.pone.0170963
关键词[WOS]CARBON-DIOXIDE EXCHANGE ; PERENNIAL GRASS MIXTURES ; LEYMUS-CHINENSIS STEPPE ; WATER-VAPOR EXCHANGE ; ALPINE MEADOW ; INNER-MONGOLIA ; SOIL RESPIRATION ; TEMPERATURE ; CHINA ; FLUXES
收录类别SCI
语种英语
项目资助者National Natural Science Foundation of China(31570478) ; State's Key Project of Research and Development Plan(2016YFC0501905) ; Scientific Research Fund of the Second Institute of Oceanography, SOA(JG1506) ; State Key Laboratory of the Grassland Agro-ecosystems Open Projects Fund(SKLGAE201506)
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000396211400020
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/6785
专题中国科学院西北高原生物研究所
作者单位1.State Ocean Adm, Inst Oceanog 2, Key Lab Marine Ecosyst & Biogeochem, Hangzhou, Zhejiang, Peoples R China
2.Qiqihar Univ, Coll Life Sci & Agr & Forestry, Qiqihar, Peoples R China
3.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining, Peoples R China
4.Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan
5.Univ Tsukuba, Doctoral Program Biol Sci, Tsukuba, Ibaraki, Japan
6.Nankai Univ, Coll Life Sci, Tianjin, Peoples R China
推荐引用方式
GB/T 7714
Wang, Bin,Jin, Haiyan,Li, Qi,et al. Diurnal and Seasonal Variations in the Net Ecosystem CO2 Exchange of a Pasture in the Three-River Source Region of the Qinghai-Tibetan Plateau[J]. PLOS ONE,2017,12(1).
APA Wang, Bin.,Jin, Haiyan.,Li, Qi.,Chen, Dongdong.,Zhao, Liang.,...&Gu, Song.(2017).Diurnal and Seasonal Variations in the Net Ecosystem CO2 Exchange of a Pasture in the Three-River Source Region of the Qinghai-Tibetan Plateau.PLOS ONE,12(1).
MLA Wang, Bin,et al."Diurnal and Seasonal Variations in the Net Ecosystem CO2 Exchange of a Pasture in the Three-River Source Region of the Qinghai-Tibetan Plateau".PLOS ONE 12.1(2017).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Wang, Bin]的文章
[Jin, Haiyan]的文章
[Li, Qi]的文章
百度学术
百度学术中相似的文章
[Wang, Bin]的文章
[Jin, Haiyan]的文章
[Li, Qi]的文章
必应学术
必应学术中相似的文章
[Wang, Bin]的文章
[Jin, Haiyan]的文章
[Li, Qi]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。