干旱区生态环境知识资源中心(Arid): Rapid nitrate reduction produces pulsed NO and N2O emissions following wetting of dryland soils

Arid

DOI	10.1007/s10533-022-00896-x
	Rapid nitrate reduction produces pulsed NO and N2O emissions following wetting of dryland soils
	Krichels, Alexander H.; Homyak, Peter M.; Aronson, Emma L.; Sickman, James O.; Botthoff, Jon; Shulman, Hannah; Piper, Stephanie; Andrews, Holly M.; Jenerette, G. Darrel
通讯作者	Krichels, AH (corresponding author)，Univ Calif Riverside, Environm Sci, Riverside, CA 92521 USA.
来源期刊	BIOGEOCHEMISTRY
ISSN	0168-2563
EISSN	1573-515X
出版年	2022
卷号	158 期号:2 页码:233-250
英文摘要	Soil drying and wetting cycles can produce pulses of nitric oxide (NO) and nitrous oxide (N2O) emissions with substantial effects on both regional air quality and Earth's climate. While pulsed production of N emissions is ubiquitous across ecosystems, the processes governing pulse magnitude and timing remain unclear. We studied the processes producing pulsed NO and N2O emissions at two contrasting drylands, desert and chaparral, where despite the hot and dry conditions known to limit biological processes, some of the highest NO and N2O flux rates have been measured. We measured N2O and NO emissions every 30 min for 24 h after wetting soils with isotopically-enriched nitrate and ammonium solutions to determine production pathways and their timing. Nitrate was reduced to N2O within 15 min of wetting, with emissions exceeding 1000 ng N-N2O m(-2) s(-1) and returning to background levels within four hours, but the pulse magnitude did not increase in proportion to the amount of ammonium or nitrate added. In contrast to N2O, NO was emitted over 24 h and increased in proportion to ammonium addition, exceeding 600 ng N-NO m(-2) s(-1) in desert and chaparral soils. Isotope tracers suggest that both ammonia oxidation and nitrate reduction produced NO. Taken together, our measurements demonstrate that nitrate can be reduced within minutes of wetting summer-dry desert soils to produce large N2O emission pulses and that multiple processes contribute to long-lasting NO emissions. These mechanisms represent substantial pathways of ecosystem N loss that also contribute to regional air quality and global climate dynamics.
英文关键词	Drylands Nitrogen Nitric oxide Nitrous oxide Nitrate Pulse
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000753784100001
WOS关键词	NITROGEN ISOTOPIC ANALYSIS ; NITRIC-OXIDE ; GAS-FORMATION ; DENITRIFICATION ; NITRIFICATION ; MECHANISMS ; CALIFORNIA ; MOISTURE ; SAVANNA ; FOREST
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376304
作者单位	[Krichels, Alexander H.; Homyak, Peter M.; Sickman, James O.] Univ Calif Riverside, Environm Sci, Riverside, CA 92521 USA; [Krichels, Alexander H.; Botthoff, Jon; Jenerette, G. Darrel] Univ Calif Riverside, Ctr Conservat Biol, Riverside, CA 92521 USA; [Aronson, Emma L.; Shulman, Hannah] Univ Calif Riverside, Microbiol & Plant Pathol, Riverside, CA 92521 USA; [Piper, Stephanie; Jenerette, G. Darrel] Univ Calif Riverside, Bot & Plant Sci, Riverside, CA 92521 USA; [Andrews, Holly M.] Univ Calif Riverside, Evolut Ecol & Organismal Biol, Riverside, CA 92521 USA
推荐引用方式 GB/T 7714	Krichels, Alexander H.,Homyak, Peter M.,Aronson, Emma L.,et al. Rapid nitrate reduction produces pulsed NO and N2O emissions following wetting of dryland soils[J],2022,158(2):233-250.
APA	Krichels, Alexander H..,Homyak, Peter M..,Aronson, Emma L..,Sickman, James O..,Botthoff, Jon.,...&Jenerette, G. Darrel.(2022).Rapid nitrate reduction produces pulsed NO and N2O emissions following wetting of dryland soils.BIOGEOCHEMISTRY,158(2),233-250.
MLA	Krichels, Alexander H.,et al."Rapid nitrate reduction produces pulsed NO and N2O emissions following wetting of dryland soils".BIOGEOCHEMISTRY 158.2(2022):233-250.