Carbon pools and fluxes in a Tibetan alpine Kobresia pygmaea pasture partitioned by coupled eddy-covariance measurements and (CO2)-C-13 pulse labeling (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Carbon pools and fluxes in a Tibetan alpine Kobresia pygmaea pasture partitioned by coupled eddy-covariance measurements and (CO2)-C-13 pulse labeling (SCI)
	Ingrisch J.; Biermann T.; Seeber E.; Leipold T.; Li M. S.; Ma Y. M.; Xu X. L.; Miehe G.; Guggenberger G.; Foken T.
刊名	Science of the Total Environment
	2015
卷号	505 页码:1213-1224
英文摘要	The Tibetan highlands host the largest alpine grassland ecosystems worldwide, bearing soils that store substantial stocks of carbon (C) that are very sensitive to land use changes. This study focuses on the cycling of photoassimilated C within a Kobresia pygmaea pasture, the dominating ecosystems on the Tibetan highlands. We investigated short-term effects of grazing cessation and the role of the characteristic Kobresia root turf on C fluxes and belowground C turnover. By combining eddy-covariance measurements with (CO2)-C-13 pulse labeling we applied a powerful new approach to measure absolute fluxes of assimilates within and between various pools of the plant-soil-atmosphere system. The roots and soil each store roughly 50% of the overall C in the system (76 Mg Cha(-1)), with only a minor contribution from shoots, which is also expressed in the root:shoot ratio of 90. During June and July the pasture acted as a weak C sink with a strong uptake of approximately 2 g C m(-2) d(-1) in the first half of July. The root turf was the main compartment for the turnover of photoassimilates, with a subset of highly dynamic roots (mean residence time 20 days), and plays a key role for the C cycling and C storage in this ecosystem. The short-term grazing cessation only affected aboveground biomass but not ecosystem scale C exchange or assimilate allocation into roots and soil. (C) 2014 Elsevier B.V. All rights reserved.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/27306]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Ingrisch J.,Biermann T.,Seeber E.,et al. Carbon pools and fluxes in a Tibetan alpine Kobresia pygmaea pasture partitioned by coupled eddy-covariance measurements and (CO2)-C-13 pulse labeling (SCI)[J]. Science of the Total Environment,2015,505:1213-1224.
APA	Ingrisch J..,Biermann T..,Seeber E..,Leipold T..,Li M. S..,...&Kuzyakov Y..(2015).Carbon pools and fluxes in a Tibetan alpine Kobresia pygmaea pasture partitioned by coupled eddy-covariance measurements and (CO2)-C-13 pulse labeling (SCI).Science of the Total Environment,505,1213-1224.
MLA	Ingrisch J.,et al."Carbon pools and fluxes in a Tibetan alpine Kobresia pygmaea pasture partitioned by coupled eddy-covariance measurements and (CO2)-C-13 pulse labeling (SCI)".Science of the Total Environment 505(2015):1213-1224.