气候变化领域集成服务门户(CCPortal): Warming and grazing interact to affect root dynamics in an alpine meadow

CCPortal

DOI	10.1007/s11104-020-04681-3
	Warming and grazing interact to affect root dynamics in an alpine meadow
	Wu, Yibo; Zhu, Biao; Eissenstat, David M.; Wang, Shiping; Tang, Yanhong; Cui, Xiaoyong
通讯作者	Cui, XY (通讯作者)
发表日期	2021
ISSN	0032-079X
EISSN	1573-5036
起始页码	109
结束页码	124
卷号	459 期号:1-2
英文摘要	Aims Root dynamics plays a fundamental role in determining carbon allocation and other main ecological processes in grasslands. Understanding the responses of root activities to ongoing warming in grazed alpine meadows enable us to predict the potential changes in the carbon budget and ecosystem functions in alpine regions. Methods We conducted a controlled 4-year field experiment with warming and grazing in an alpine meadow on the Qinghai-Tibetan Plateau. Our objective was to explore the responses of root standing crop, production, mortality and turnover rate to warming and grazing using minirhizotrons. Results Warming only significantly inhibited root mortality while grazing promoted all the four root metrics, which were also significantly influenced by the interaction of warming and grazing. Warming oppositely affected the four metrics under grazing versus non-grazing conditions. It significantly reduced root mean standing crop, annual production and mortality without grazing, but significantly stimulated only mean standing crop under grazing. Grazing had significantly negative and positive effects on mean standing crop in the no warming and warming plots. It promoted annual root production and mortality regardless of warming, whereas the effects were significant only under warming condition. Moreover, grazing significantly increased turnover rate in no warming plots but slightly decreased it in warming plots. Conclusions These findings highlight the non-additive interactions on the alpine meadow root dynamics between warming and grazing. Therefore, grazing regimes should be considered to better model the ecosystem feedback to global warming and to improve the prediction of future ecosystem functions.
关键词	NET PRIMARY PRODUCTIVITY BELOW-GROUND BIOMASS ELEVATED CO2 INNER-MONGOLIA CLIMATE-CHANGE INTERANNUAL VARIABILITY TERRESTRIAL ECOSYSTEMS SPECIES COMPOSITION SOIL RESPIRATION ORGANIC NITROGEN
英文关键词	Warming; Grazing; Root production; Turnover rate; Soil depth; Alpine meadow
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000562660500001
来源期刊	PLANT AND SOIL
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/260475
推荐引用方式 GB/T 7714	Wu, Yibo,Zhu, Biao,Eissenstat, David M.,et al. Warming and grazing interact to affect root dynamics in an alpine meadow[J]. 中国科学院青藏高原研究所,2021,459(1-2).
APA	Wu, Yibo,Zhu, Biao,Eissenstat, David M.,Wang, Shiping,Tang, Yanhong,&Cui, Xiaoyong.(2021).Warming and grazing interact to affect root dynamics in an alpine meadow.PLANT AND SOIL,459(1-2).
MLA	Wu, Yibo,et al."Warming and grazing interact to affect root dynamics in an alpine meadow".PLANT AND SOIL 459.1-2(2021).