干旱区生态环境知识资源中心(Arid): Sustained increase in soil respiration after nine years of warming in an alpine meadow on the Tibetan Plateau

Arid

DOI	10.1016/j.geoderma.2020.114641
	Sustained increase in soil respiration after nine years of warming in an alpine meadow on the Tibetan Plateau
	Peng, Fei; Zhang, Wenjuan; Li, Chengyang; Lai, Chimin; Zhou, Jun; Xue, Xian; Tsunekawa, Atsushi
通讯作者	Peng, F
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	379
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 degrees 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 mu mol m(2) s(-1) in control in the growing season) increased in the warmed plots. In the early growing season, the increase in heterotrophic respiration (R-h) 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 R-h 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.
英文关键词	Climate warming Microbial community Metabolic activity Alpine meadow Cold-arid regions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000580657200018
WOS关键词	BACTERIAL COMMUNITY STRUCTURE ; CARBON-CYCLE FEEDBACKS ; MICROBIAL COMMUNITIES ; SHORT-TERM ; PERMAFROST CARBON ; NITROGEN ; BIOMASS ; FOREST ; GROWTH ; MICROORGANISMS
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326989
作者单位	[Peng, Fei; Zhang, Wenjuan; Li, Chengyang; Lai, Chimin; Xue, Xian] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Peng, Fei] Tottori Univ, Int Platform Dryland Res & Educ, Tottori, Japan; [Peng, Fei; Xue, Xian] Chinese Acad Sci, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Beijing, Peoples R China; [Zhang, Wenjuan; Li, Chengyang; Lai, Chimin] Univ Chinese Acad Sci, Beijing, Peoples R China; [Zhou, Jun] Chinese Acad Sci, Inst Mt Hazards & Environm, Beijing, Peoples R China; [Tsunekawa, Atsushi] Tottori Univ, Arid Land Res Ctr, 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],2020,379.
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.
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).