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

文献类型：期刊论文

作者Li, Changbin1,2; Peng, Yunfeng4; Nie, Xiuqing1,2; Yang, Yuanhe4; Yang, Lucun2; Li, Fei1,4; Fang, Kai1,4; Xiao, Yuanming1,2; Zhou, Guoying2
刊名SCIENTIFIC REPORTS
出版日期2018
卷号8
ISSN号2045-2322
DOI10.1038/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
WOS记录号WOS:000449499500035
出版者NATURE PUBLISHING GROUP
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]
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.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Tibetan Med Res, Xining 810008, Qinghai, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Qinghai Key Lab Qing Tibet Biol Resources, Xining 810008, Qinghai, 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).

入库方式： OAI收割

来源：植物研究所

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