Climate change affects soil labile organic carbon fractions in a Tibetan alpine meadow

doi:10.1007/s11368-016-1565-4

	Climate change affects soil labile organic carbon fractions in a Tibetan alpine meadow
	Hu, YG (Hu, Yigang)1,2; Wang, ZR (Wang, Zengru)1,2; Wang, Q (Wang, Qi)3,4; Wang, SP (Wang, Shiping)3,5; Zhang, ZS (Zhang, Zhishan)1,2; Zhang, ZH (Zhang, Zhenhua)6; Zhao, Y (Zhao, Yang)1,2; Hu, YG ; Wang, SP
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2017
卷号	17 期号:2 页码:326-339
关键词	MICROBIAL BIOMASS-C TEMPERATURE SENSITIVITY RECIPROCAL TRANSLOCATION TERRESTRIAL ECOSYSTEMS MATTER DECOMPOSITION ELEVATION GRADIENT TURNOVER NITROGEN PLATEAU RESPIRATION
DOI	10.1007/s11368-016-1565-4
文献子类	Article
英文摘要	Changes in bioactive soil C pools and their temperature sensitivities will dominate the fate of soil organic C in a warmer future, which is not well understood in highland ecosystems. This study was conducted in order to evaluate climate change, especially cooling effects, on soil labile organic C (LOC) pools in a Tibetan alpine meadow. A short-term reciprocal translocation experiment was implemented to stimulate climate warming (downward translocation) and cooling (upward translocation) using an elevation gradient on the Tibetan Plateau. Variations in soil microbial biomass C (MBC), dissolved organic C (DOC) and LOC were analyzed. Over the range of soil temperature from 0.02 to 5.5 A degrees C, warming averagely increased soil MBC, DOC and LOC by 15.3, 17.0 and 3.7 % while cooling decreased them by 11.0, 11.9 and 3.2 %, respectively. Moreover, warming generally increased the proportion of DOC in LOC but cooling had an opposite effect, while the response of the MBC proportion to DOC and LOC varied depending on vegetation type. Soil MBC, DOC and LOC pools were positively related to soil temperature and showed a hump-shaped relationship with soil moisture with a threshold of about 30-35 %. Although soil DOC was more sensitive to warming (5.1 % A degrees C-1) than to cooling (3.0 % A degrees C-1), soil LOC showed a symmetrical response due to regulation by soil moisture. Our results indicated that climate change would not only change the size of soil LOC pools but also their quality. Therefore, cooling effects and regulation of soil moisture should be considered to evaluate the fate of soil organic C in Tibetan alpine meadows in a warmer future.
学科主题	普通生物学
WOS研究方向	Environmental Sciences & Ecology; Agriculture
语种	英语
WOS记录号	WOS:000389912200004
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8363]
专题	青藏高原研究所_图书馆
通讯作者	Hu, YG; Wang, SP
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Expt & Res Stn, Lanzhou 730000, Peoples R China. 2.Key Lab Stress Physiol & Ecol Cold & Arid Reg Gan, Lanzhou 730000, Peoples R China. 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100085, Peoples R China. 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China. 5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 6.Chinese Acad Sci, Key Lab Adaptat & Evolut Plateau Biota, Northwest Inst Plateau Biol, Xining 810008, Peoples R China.
推荐引用方式 GB/T 7714	Hu, YG ,Wang, ZR ,Wang, Q ,et al. Climate change affects soil labile organic carbon fractions in a Tibetan alpine meadow[J]. JOURNAL OF SOILS AND SEDIMENTS,2017,17(2):326-339.
APA	Hu, YG .,Wang, ZR .,Wang, Q .,Wang, SP .,Zhang, ZS .,...&Wang, SP.(2017).Climate change affects soil labile organic carbon fractions in a Tibetan alpine meadow.JOURNAL OF SOILS AND SEDIMENTS,17(2),326-339.
MLA	Hu, YG ,et al."Climate change affects soil labile organic carbon fractions in a Tibetan alpine meadow".JOURNAL OF SOILS AND SEDIMENTS 17.2(2017):326-339.