干旱区生态环境知识资源中心(Arid): Greater soil carbon and nitrogen in a Mojave Desert ecosystem after 10 years exposure to elevated CO2

Arid

DOI	10.1016/j.geoderma.2019.113915
	Greater soil carbon and nitrogen in a Mojave Desert ecosystem after 10 years exposure to elevated CO2
	Koyama, Akihiro 1,2,3; Harlow, Benjamin 1,2; Evans, R. Dave 1,2
通讯作者	Koyama, Akihiro
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2019
卷号	355
英文摘要	We investigated patterns and possible mechanisms in the greater soil organic carbon (SOC) and total nitrogen (N) after 10 years exposure to elevated atmospheric CO2 concentration ([CO2]) at the Nevada Desert FACE Facility, USA, reported by Evans et al. (2014). Differences in SOC under elevated and ambient [CO2] depended on cover types, and most evident in soils under deciduous shrubs. Greater SOC was observed in soils close to the surface as well as 0.4 to 0.8 m suggesting elevated [CO2] stimulated production of aboveground litter, root litter, and rhizodeposition. Greater total N under elevated [CO2] was most evident under deciduous shrubs as well as plant interspace that had extensive coverage of biological soil crusts. Greater total N in the top soil profile under elevated [CO2] was accompanied with reduced delta N-15 by 0.4 parts per thousand, suggesting elevated [CO2] stimulated N-2-fixation and/or reduced N loss. We conclude that, in arid ecosystems under elevated [CO2], shrubs play a major role in determining C sink capacity in desert soils, and N limitation for vascular plants is unlikely to occur due to sustained net N supply.
英文关键词	Free Air CO2 Enrichment (FACE) Mojave Desert Soil organic carbon Soil total nitrogen Biological soil crust
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000487169300021
WOS关键词	LONG-TERM EXPOSURE ; FOREST PRODUCTIVITY ; ATMOSPHERIC CO2 ; SEMIARID ECOSYSTEMS ; STABLE-ISOTOPES ; N AVAILABILITY ; ORGANIC-CARBON ; PLANT ; ENHANCEMENT ; INCREASES
WOS类目	Soil Science
WOS研究方向	Agriculture
EI主题词	2019-12-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311318
作者单位	1.Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA; 2.Washington State Univ, Stable Isotope Core Lab, Pullman, WA 99164 USA; 3.Michigan State Univ, Dept Forestry, Nat Resources Bldg,480 Wilson Rd, E Lansing, MI 48824 USA
推荐引用方式 GB/T 7714	Koyama, Akihiro,Harlow, Benjamin,Evans, R. Dave. Greater soil carbon and nitrogen in a Mojave Desert ecosystem after 10 years exposure to elevated CO2[J],2019,355.
APA	Koyama, Akihiro,Harlow, Benjamin,&Evans, R. Dave.(2019).Greater soil carbon and nitrogen in a Mojave Desert ecosystem after 10 years exposure to elevated CO2.GEODERMA,355.
MLA	Koyama, Akihiro,et al."Greater soil carbon and nitrogen in a Mojave Desert ecosystem after 10 years exposure to elevated CO2".GEODERMA 355(2019).