globalchange  > 过去全球变化的重建
DOI: 10.1038/s41598-019-43904-1
WOS记录号: WOS:000468026100011
论文题名:
Dynamics of Soil Respiration in Alpine Wetland Meadows Exposed to Different Levels of Degradation in the Qinghai-Tibet Plateau, China
作者: Li, Zhongfei1,2; Gao, Jixi2; Wen, Linqin1; Zou, Changxin2; Feng, Chaoyang3,4; Li, Daiqing3,4; Xu, Delin2
通讯作者: Gao, Jixi
刊名: SCIENTIFIC REPORTS
ISSN: 2045-2322
出版年: 2019
卷: 9
语种: 英语
WOS关键词: TERRESTRIAL CARBON STORAGE ; TEMPERATURE SENSITIVITY ; ECOSYSTEM RESPIRATION ; CO2 EXCHANGE ; INTERANNUAL VARIABILITY ; ENVIRONMENTAL CONTROLS ; SEMIARID GRASSLANDS ; LAND-USE ; CLIMATE ; FLUXES
WOS学科分类: Multidisciplinary Sciences
WOS研究方向: Science & Technology - Other Topics
英文摘要:

The effects of degradation of alpine wetland meadow on soil respiration (Rs) and the sensitivity of Rs to temperature (Q(10)) were measured in the Napa Lake region of Shangri-La on the southeastern edge of the Qinghai-Tibet Plateau. Rs was measured for 24 h during each of three different stages of the growing season on four different degraded levels. The results showed: (1) peak Rs occurred at around 5:00 p.m., regardless of the degree of degradation and growing season stage, with the maximum Rs reaching 10.05 mu mol.m(-2).s(-1) in non-degraded meadows rather than other meadows; (2) the daily mean Rs value was 7.14-7.86 mu mol.m(-2.)s(-1) during the mid growing season in non-degraded meadows, and declined by 48.4-62.6% when degradation increased to the severely degraded level; (3) Q(10) ranged from 7.1-11.3 in non-degraded meadows during the mid growing season, 5.5-8.0 and 6.2-8.2 during the early and late growing seasons, respectively, and show a decline of about 50% from the non-degraded meadows to severely degraded meadows; (4) Rs was correlated significantly with soil temperature at a depth of 0-5 cm (p < 0.05) on the diurnal scale, but not at the seasonal scale; (5) significant correlations were found between Rs and soil organic carbon (SOC), between biomass and SOC, and between Q(10) and Rs (p < 0.05), which indicates that biomass and SOC potentially impact Q(10). The results suggest that vegetation degradation impact both Rs and Q(10) significantly. Also, we speculated that Q(10) of alpine wetland meadow is probable greater at the boundary region than inner region of the Qinghai-Tibet Plateau, and shoule be a more sensitive indicator in the studying of climate change in this zone.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/138464
Appears in Collections:过去全球变化的重建

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作者单位: 1.Southwest Forestry Univ, Coll Ecol & Environm, Kunming 650224, Yunnan, Peoples R China
2.Minist Ecol & Environm, Nanjing Inst Environm Sci, Nanjing 210042, Jiangsu, Peoples R China
3.Chinese Res Inst Environm Sci, Beijing 100012, Peoples R China
4.State Environm Protect Key Lab Reg Ecoproc & Func, Beijing 100012, Peoples R China

Recommended Citation:
Li, Zhongfei,Gao, Jixi,Wen, Linqin,et al. Dynamics of Soil Respiration in Alpine Wetland Meadows Exposed to Different Levels of Degradation in the Qinghai-Tibet Plateau, China[J]. SCIENTIFIC REPORTS,2019-01-01,9
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