干旱区生态环境知识资源中心(Arid): Divergent responses of nitrous oxide, methane and carbon dioxide exchange to pulses of nitrogen addition in a desert in Central Asia

Arid

DOI	10.1016/j.catena.2018.09.048
	Divergent responses of nitrous oxide, methane and carbon dioxide exchange to pulses of nitrogen addition in a desert in Central Asia
	Zhou, Xiaobing 1; Lv, Xiangfang 2; Tao, Ye 1,3; Wu, Lin 4; Havrilla, Caroline A.5; Zhang, Yuanming1
通讯作者	Zhang, Yuanming
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	173 页码:29-37
英文摘要	Desert ecosystems are nitrogen-limited, and highly responsive to even small inputs of nitrogen. Recently, desert ecosystems have been affected by increasing levels of nitrogen deposition, which may lead to changes in greenhouse gas efflux. However, the effects of nitrogen deposition on these gases in the desert ecosystems remain poorly understood. To study the dynamics in greenhouse gases under increasing nitrogen, six rates of simulated nitrogen deposition, including 0(N0), 0.5(N0.5), 1.0(N1), 3.0(N3), 6.0(N6), 24.0 (N24) g nitrogen m(-2) a(-1), were applied in soils of the Gurbantunggut Desert in Central Asia. Efflux of nitrous oxide (N2O), methane (CH4), ecosystem respiration and net carbon ecosystem exchange were measured across two growing seasons for two years. The efflux of the four gases changed greatly in different seasons, which can explain more variation than nitrogen treatments except for N2O. Nitrogen input stimulated N2O emission, especially in the high nitrogen treatments, with N2O emission 1.6 (N6) and 2.6 (N24) times greater than control (NO). However, N2O exchange also depended on the seasons, while only minor changes were found in some seasons (late spring 2010 and late summer 2011). Overall, CH4 uptake (average 31.4 mu g m(-2) h(-1)) was not significantly affected by the nitrogen addition. At the high nitrogen treatment levels, ecosystem respiration decreased in the late spring and summer of the second year, with similar responses to nitrogen addition in mid-autumn between two years. Net ecosystem carbon exchange also showed gradual responses to nitrogen addition overall, but did not differ significantly across seasons and treatments. Overall, structural equation models showed that the dynamics in N2O were mostly attributed to variations in nitrogen addition, CH4 to soil moisture (or temperature), ecosystem respiration to plant species richness (or density) and net ecosystem carbon exchange to soil moisture (or temperature). Our study indicates that the changes in greenhouse gas emissions caused by nitrogen deposition in short time scale were small in these desert soils.
英文关键词	Nitrogen deposition Nitrous oxide Methane Ecosystem respiration Net ecosystem carbon exchange Desert ecosystem
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000452814300004
WOS关键词	NORTHERN CHIHUAHUAN DESERT ; N2O FLUXES ; SOIL RESPIRATION ; NET ECOSYSTEM ; ENVIRONMENTAL-FACTORS ; N DEPOSITION ; GURBANTUNGGUT DESERT ; ATMOSPHERIC METHANE ; ALPINE GRASSLAND ; INNER-MONGOLIA
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214810
作者单位	1.Chinese Acad Sci, Key Lab Biogeog & Bioresource Arid Land, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China; 2.Urumqi Environm Monitoring Ctr, Urumqi 830000, Xinjiang, Peoples R China; 3.Anqing Normal Univ, Anqing 246000, Anhui, Peoples R China; 4.Hubei Univ Nationalities, Enshi 445000, Hubei, Peoples R China; 5.Univ Colorado, Boulder, CO 80309 USA
推荐引用方式 GB/T 7714	Zhou, Xiaobing,Lv, Xiangfang,Tao, Ye,et al. Divergent responses of nitrous oxide, methane and carbon dioxide exchange to pulses of nitrogen addition in a desert in Central Asia[J]. 中国科学院新疆生态与地理研究所,2019,173:29-37.
APA	Zhou, Xiaobing,Lv, Xiangfang,Tao, Ye,Wu, Lin,Havrilla, Caroline A.,&Zhang, Yuanming.(2019).Divergent responses of nitrous oxide, methane and carbon dioxide exchange to pulses of nitrogen addition in a desert in Central Asia.CATENA,173,29-37.
MLA	Zhou, Xiaobing,et al."Divergent responses of nitrous oxide, methane and carbon dioxide exchange to pulses of nitrogen addition in a desert in Central Asia".CATENA 173(2019):29-37.