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DOI:	10.1371/journal.pone.0165212
论文题名:	Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau
作者:	Xiaoying Bao; Xiaoxue Zhu; Xiaofeng Chang; Shiping Wang; Burenbayin Xu; Caiyun Luo; Zhenhua Zhang; Qi Wang; Yichao Rui; Xiaoying Cui
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2016
发表日期:	2016-10-31
卷:	11, 期:10
语种:	英语
英文关键词:	Grazing ; Soil respiration ; Q10 temperature coefficient ; Glucose ; Physical geography ; Biomass (ecology) ; Carbon dioxide ; Analysis of variance
英文摘要:	Understanding of effects of soil temperature and soil moisture on soil respiration (Rs) under future warming is critical to reduce uncertainty in predictions of feedbacks to atmospheric CO2 concentrations from grassland soil carbon. Intact cores with roots taken from a full factorial, 5-year alpine meadow warming and grazing experiment in the field were incubated at three different temperatures (i.e. 5, 15 and 25°C) with two soil moistures (i.e. 30 and 60% water holding capacity (WHC)) in our study. Another experiment of glucose-induced respiration (GIR) with 4 h of incubation was conducted to determine substrate limitation. Our results showed that high temperature increased Rs and low soil moisture limited the response of Rs to temperature only at high incubation temperature (i.e. 25°C). Temperature sensitivity (Q10) did not significantly decrease over the incubation period, suggesting that substrate depletion did not limit Rs. Meanwhile, the carbon availability index (CAI) was higher at 5°C compared with 15 and 25°C incubation, but GIR increased with increasing temperature. Therefore, our findings suggest that warming-induced decrease in Rs in the field over time may result from a decrease in soil moisture rather than from soil substrate depletion, because warming increased root biomass in the alpine meadow.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0165212&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/23464
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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作者单位:

College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;Institute of Soil and Water Conservation, Northwest A&F University, 26 Xinong Rd., 712100 Yangling, China;Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;CAS Center for Excellence of Tibetan Plateau Earth Science, Chinese Academy of Sciences, Beijing 100101, China;Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China;Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China;College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China;College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China;College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China

Recommended Citation:

Xiaoying Bao,Xiaoxue Zhu,Xiaofeng Chang,et al. Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau[J]. PLOS ONE,2016-01-01,11(10)

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