干旱区生态环境知识资源中心(Arid): Fire changes the spatial pattern and dynamics of soil nitrogen (N) and delta N-15 at a grassland-shrubland ecotone

Arid

DOI	10.1016/j.jaridenv.2020.104422
	Fire changes the spatial pattern and dynamics of soil nitrogen (N) and delta N-15 at a grassland-shrubland ecotone
	Wang, Guan; Li, Junran; Ravi, Sujith; Theiling, Bethany; Burger, William
通讯作者	Li, JR (corresponding author), Univ Tulsa, Dept Geosci, Tulsa, OK 74104 USA.
来源期刊	JOURNAL OF ARID ENVIRONMENTS
ISSN	0140-1963
EISSN	1095-922X
出版年	2021
卷号	186
英文摘要	Fire disturbance represents a major driver of soil nitrogen (N) distribution in many arid and semiarid grasslands. The spatial patterns of soil N and delta 15 N at microsite scale following fires, however, are rarely studied. Here we investigated the spatial distribution of soil N and soil delta 15 N before and within three years after a prescribed fire in a grassland-shrubland ecotone in the northern Chihuahuan Desert. The spatial heterogeneity of soil N decreased significantly after the fire, with the autocorrelation distance increasing from 1.55 m to over 3 m, and the spatial dependence index decreasing from 99% to 73%. Soil delta 15 N was autocorrelated at 0.44 m after the fire, a much smaller scale that is similar to recovered grass patches, suggesting grasses tend to control the soil N cycling rather than shrubs. Different from the overall content of soil N, which merely changed before and after fire, soil delta 15 N increased substantially after the fire. We argued that high temperature and increased soil moisture at grass microsites post-fire may lead to an enhanced mineralization rate and 15 N-enriched soil ammonium at grass microsites, which further stimulates the rapid recovery of grasses after the fire.
英文关键词	Soil nitrogen Fire-induced Microsite-scale Spatial pattern Grass-shrub competition
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000611830300001
WOS关键词	WOODY PLANT ENCROACHMENT ; ORGANIC-CARBON ; VEGETATION ; WATER ; CYCLES ; AVAILABILITY ; NUTRIENTS ; INVASIONS ; ABUNDANCE ; EROSION
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350675
作者单位	[Wang, Guan; Li, Junran] Univ Tulsa, Dept Geosci, Tulsa, OK 74104 USA; [Wang, Guan] Beijing Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China; [Ravi, Sujith; Burger, William] Temple Univ, Dept Earth & Environm Sci, Philadelphia, PA 19122 USA; [Theiling, Bethany] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
推荐引用方式 GB/T 7714	Wang, Guan,Li, Junran,Ravi, Sujith,et al. Fire changes the spatial pattern and dynamics of soil nitrogen (N) and delta N-15 at a grassland-shrubland ecotone[J]. 北京林业大学,2021,186.
APA	Wang, Guan,Li, Junran,Ravi, Sujith,Theiling, Bethany,&Burger, William.(2021).Fire changes the spatial pattern and dynamics of soil nitrogen (N) and delta N-15 at a grassland-shrubland ecotone.JOURNAL OF ARID ENVIRONMENTS,186.
MLA	Wang, Guan,et al."Fire changes the spatial pattern and dynamics of soil nitrogen (N) and delta N-15 at a grassland-shrubland ecotone".JOURNAL OF ARID ENVIRONMENTS 186(2021).