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Sustained increase in soil respiration after nine years of warming in an alpine meadow on the Tibetan Plateau

文献类型：期刊论文

作者Peng Fei2,3,4; Zhang Wenjuan1,4; Li Chengyang1,4; Lai Chimin1,4; Zhou Jun5; Xue Xian2,4; Tsunekawa Atsushi6
刊名Geoderma
出版日期2020
卷号379页码:114641
ISSN号0016-7061
关键词Bacteria Biomass Climate change Metabolism
DOI10.1016/j.geoderma.2020.114641
通讯作者Peng, Fei(pengfei@lzb.ac.cn)
产权排序5
文献子类Article
英文摘要Soil microbes are key determinants of soil carbon (C) dynamics. The response of the soil microbial community to climate warming modulates the feedback between ecosystem C cycling and future climate change. We conducted a long-term manipulative warming (1.6 °C increase of the soil temperature at 5 cm) experiment to examine the soil respiration, microbial biomass, and community composition at an alpine meadow site on the Qinghai-Tibetan Plateau. After nine years of warming, soil respiration (3.5 μmol m2 s−1 in control in the growing season) increased in the warmed plots. In the early growing season, the increase in heterotrophic respiration (Rh) accounted for more than 90% of the increase in soil respiration. The warming effect gradually decreased during the mid and late growing season (46%). Microbial biomass C and nitrogen declined significantly in the 0–10 cm to the 30–50 cm layer. Warming did not significantly affect microbial biomass C and N in any soil depth layer. Metabolic activity of microbes in terms of Rh per unit microbial biomass C significantly increased by 66% in warmed plots. The bacterial and fungal community composition did not significantly change in the warmed plots. The relative abundance of Actinobacteria decreased at 20–30 cm and 30–50 cm soil depths, but that of Cercozoa increased in all four soil layers. The relative Actinobacteria abundance was negatively correlated with Rh and metabolic activity in the 10–20 and 20–30 cm layers. Our results indicate a decrease in Actinobacteria abundance, increases in metabolic activity, and no substrate limitation sustained the positive warming effect on soil respiration throughout the last 9 years. This implies that climate warming could trigger a substantial loss of soil C to the atmosphere in the alpine meadow on the Qinghai-Tibet Plateau. © 2020 Elsevier B.V.
WOS关键词BACTERIAL COMMUNITY STRUCTURE ; CARBON-CYCLE FEEDBACKS ; MICROBIAL COMMUNITIES ; SHORT-TERM ; PERMAFROST CARBON ; NITROGEN ; BIOMASS ; FOREST ; GROWTH ; MICROORGANISMS
资助项目National Natural Science Foundation of China[NSFC 41771229] ; Youth Innovation Promotion Association, Chinese Academy of Sciences
WOS研究方向Agriculture
语种英语
出版者ELSEVIER
WOS记录号WOS:000580657200018
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences
源URL[http://ir.imde.ac.cn/handle/131551/46661]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者Peng Fei
作者单位1.University of Chinese Academy of Sciences, Beijing, China;
2.Beiluhe Observation and Research Station on Frozen Soil Engineering and Environment in Qinghai-Tibet Plateau, Chinese Academy of Sciences, China;
3.International Platform for Dryland Research and Education, Tottori University, Tottori, Japan;
4.Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China;
5.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, China;
6.Arid Land Research Center, Tottori University, Tottori, Japan
推荐引用方式
GB/T 7714		 Peng Fei,Zhang Wenjuan,Li Chengyang,et al. Sustained increase in soil respiration after nine years of warming in an alpine meadow on the Tibetan Plateau[J]. Geoderma,2020,379:114641.
APA Peng Fei.,Zhang Wenjuan.,Li Chengyang.,Lai Chimin.,Zhou Jun.,...&Tsunekawa Atsushi.(2020).Sustained increase in soil respiration after nine years of warming in an alpine meadow on the Tibetan Plateau.Geoderma,379,114641.
MLA Peng Fei,et al."Sustained increase in soil respiration after nine years of warming in an alpine meadow on the Tibetan Plateau".Geoderma 379(2020):114641.

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来源：成都山地灾害与环境研究所

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