气候变化领域集成服务门户(CCPortal): Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau

CCPortal

DOI	10.1371/journal.pone.0165212
	Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau
	Bao, Xiaoying; Zhu, Xiaoxue; Chang, Xiaofeng; Wang, Shiping; Xu, Burenbayin; Luo, Caiyun; Zhang, Zhenhua; Wang, Qi; Rui, Yichao; Cui, Xiaoying
通讯作者	Wang, SP (通讯作者)
发表日期	2016
ISSN	1932-6203
卷号	11 期号:10
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 degrees 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 degrees C). Temperature sensitivity (Q(10)) 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 degrees C compared with 15 and 25 degrees 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.
关键词	ORGANIC-MATTER DECOMPOSITION MICROBIAL RESPIRATION CLIMATE-CHANGE SUBSTRATE AVAILABILITY SEMIARID GRASSLAND THERMAL ADAPTATION EXTRACTION METHOD SENSITIVITY CARBON ECOSYSTEM
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000386711100023
来源期刊	PLOS ONE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258758
推荐引用方式 GB/T 7714	Bao, Xiaoying,Zhu, Xiaoxue,Chang, Xiaofeng,et al. Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,11(10).
APA	Bao, Xiaoying.,Zhu, Xiaoxue.,Chang, Xiaofeng.,Wang, Shiping.,Xu, Burenbayin.,...&Cui, Xiaoying.(2016).Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau.PLOS ONE,11(10).
MLA	Bao, Xiaoying,et al."Effects of Soil Temperature and Moisture on Soil Respiration on the Tibetan Plateau".PLOS ONE 11.10(2016).