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	Partitioning pattern of carbon flux in a kobresia grassland on the qinghai-tibetan plateau revealed by field 13c pulse-labeling
	Wu, Yibo1; Tan, Hongchao1; Deng, Yongcui1; Wu, Jing1; Xu, Xingliang2; Wang, Yanfen1; Tang, Yanhong3; Higashi, Teruo4; Cui, Xiaoyong1
刊名	Global change biology
	2010-08-01
卷号	16期号:8页码:2322-2333
关键词	13c pulse labeling Alpine meadow Carbon allocation Carbon turnover Grazing
ISSN号	1354-1013
DOI	10.1111/j.1365-2486.2009.02069.x
通讯作者	Cui, xiaoyong(cuixy@gucas.ac.cn)
英文摘要	Characterizing the carbon turnover in terrestrial ecosystems is critical for understanding and predicting carbon dynamics in ecosystems. we used in situ 13c pulse labeling to track photosynthetic carbon fluxes from shoot to roots and to soil in a kobresia humilis meadow on the qinghai-tibet plateau. we found that about 36.7% of labeled carbon was translocated out from the shoots within the first 24 h after photosynthetic uptake. this is equivalent to 66.1% of total 13c moving out from the shoot during the 32-day chase period, indicating a rapid and large translocation of newly fixed carbon to belowground parts in these alpine plants. 58.7% of the assimilated 13c was transferred belowground. at the end of the chase phase, 30.9% was retained in living roots, 3.4% in dead roots, 17.2% lost as belowground respiration and 7.3% remained in the soil. in the four carbon pools (i.e., shoots, living roots, dead roots, and soil pools), living roots consistently had the highest proportion of 13c in the plant-soil system during the 32 days. based on the 13c partitioning pattern and biomass production, we estimate a total of 4930 kg c ha-1 was allocated belowground during the vegetation growth season in this alpine meadow. of this, roots accumulated 2868 kg c ha-1 and soils accumulated 613 kg c ha-1. this study suggests that carbon storage in belowground carbon pools plays the most important role in carbon cycles in the alpine meadow.
WOS关键词	PHOTOSYNTHETICALLY-FIXED CARBON ; FESTUCA-PRATENSIS L ; LOLIUM-PERENNE ; UPLAND GRASSLAND ; ALPINE MEADOW ; ROOT EXUDATION ; SOIL ; RHIZOSPHERE ; PLANTS ; C-14
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000279443800014
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2411989
专题	中国科学院大学
通讯作者	Cui, Xiaoyong
作者单位	1.Chinese Acad Sci, Grad Univ, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058569, Japan 4.Univ Tsukuba, Inst Appl Biochem, Tsukuba, Ibaraki 3058577, Japan
推荐引用方式 GB/T 7714	Wu, Yibo,Tan, Hongchao,Deng, Yongcui,et al. Partitioning pattern of carbon flux in a kobresia grassland on the qinghai-tibetan plateau revealed by field 13c pulse-labeling[J]. Global change biology,2010,16(8):2322-2333.
APA	Wu, Yibo.,Tan, Hongchao.,Deng, Yongcui.,Wu, Jing.,Xu, Xingliang.,...&Cui, Xiaoyong.(2010).Partitioning pattern of carbon flux in a kobresia grassland on the qinghai-tibetan plateau revealed by field 13c pulse-labeling.Global change biology,16(8),2322-2333.
MLA	Wu, Yibo,et al."Partitioning pattern of carbon flux in a kobresia grassland on the qinghai-tibetan plateau revealed by field 13c pulse-labeling".Global change biology 16.8(2010):2322-2333.

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