Differential responses of heterotrophic and autotrophic respiration to nitrogen addition and precipitation changes in a Tibetan alpine steppe

doi:10.1038/s41598-018-34969-5

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	Differential responses of heterotrophic and autotrophic respiration to nitrogen addition and precipitation changes in a Tibetan alpine steppe
	Li, Changbin 1,3; Peng, Yunfeng 2; Nie, Xiuqing 1,3; Yang, Yuanhe 2; Yang, Lucun 3; Li, Fei 1,2; Fang, Kai 1,2; Xiao, Yuanming 1,3; Zhou, Guoying 3
刊名	SCIENTIFIC REPORTS
	2018
卷号	8
ISSN号	2045-2322
DOI	10.1038/s41598-018-34969-5
文献子类	Article
英文摘要	Soil respiration (Rs) is an important source of atmospheric CO2 flux and is sensitive to changes in soil nutrient and water contents. Despite extensive studies on the effects of enhanced atmospheric nitrogen (N) deposition and changes in precipitation (P) on Rs, few studies have taken into account the effects of interactions between these factors on Rs of alpine grasslands. To address these questions, we investigated the effects of N addition (10 g N m(-2) yr(-1)), changes in precipitation ( 50% precipitation), and their interaction on soil respiration and its components, including heterotrophic respiration (Rh) and autotrophic respiration (Ra),in a Tibetan alpine steppe during three consecutive growing seasons. We found that Rs differed in its response to N addition and precipitation regimes. Specifically, decreased precipitation led to a significant reduction in Rs during the last two years, whereas N addition minimally impacted Rs. Another important finding was that soil respiration components differed in their response to N addition and precipitation regimes. Nitrogen addition significantly enhanced Ra, whereas Rh was not altered in response to N addition. By contrast, the precipitation regime led to marked changes in Rh, but exhibited marginally significant effects on Ra. Therefore, our findings highlighted that soil respiration differed in its response to N addition and precipitation regimes mainly due to the different responses of soil respiration components to these factors. Therefore, carbon dynamics should take soil respiration components into account under global change scenarios.
学科主题	Multidisciplinary Sciences
出版地	LONDON
WOS关键词	NET PRIMARY PRODUCTION ; SOIL RESPIRATION ; CLIMATE-CHANGE ; WATER AVAILABILITY ; GRASSLAND ; ECOSYSTEM ; FOREST ; CO2 ; FERTILIZATION ; TEMPERATURE
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000449499500035
资助机构	National Science and Technology Support Project [2014BAC05B01] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [40801076] ; National Program on Basic Work Project of China [2015FY11030001] ; Strategic Priority Research Program of CAS [XDA0505030304]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20359]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Qinghai Key Lab Qing Tibet Biol Resources, Xining 810008, Qinghai, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, Xining 810008, Qinghai, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Changbin,Peng, Yunfeng,Nie, Xiuqing,et al. Differential responses of heterotrophic and autotrophic respiration to nitrogen addition and precipitation changes in a Tibetan alpine steppe[J]. SCIENTIFIC REPORTS,2018,8.
APA	Li, Changbin.,Peng, Yunfeng.,Nie, Xiuqing.,Yang, Yuanhe.,Yang, Lucun.,...&Zhou, Guoying.(2018).Differential responses of heterotrophic and autotrophic respiration to nitrogen addition and precipitation changes in a Tibetan alpine steppe.SCIENTIFIC REPORTS,8.
MLA	Li, Changbin,et al."Differential responses of heterotrophic and autotrophic respiration to nitrogen addition and precipitation changes in a Tibetan alpine steppe".SCIENTIFIC REPORTS 8(2018).