干旱区生态环境知识资源中心(Arid): Shoot and root biomass production in semi-arid shrublands exposed to long -term experimental N input

Arid

DOI	10.1016/j.scitotenv.2020.142204
	Shoot and root biomass production in semi-arid shrublands exposed to long -term experimental N input
	Vourlitis, George L.; Jaureguy, Jeff; Marin, Leticia; Rodriguez, Charlton
通讯作者	Vourlitis, GL
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	754
英文摘要	Anthropogenic nitrogen (N) deposition has affected the primary production of terrestrial ecosystems worldwide; however, ecosystem responses often vary over time because of transient responses, interactions between N, precipitation, and/or other nutrients, and changes in plant species composition. Here we report N-induced changes in aboveand below-ground standing crop and production over an 11-year period for two semi-arid shrublands, chaparral and coastal sage scrub (CSS), of Southern California. Shrubs were exposed to 50 kgN ha(-1) in the fall of each year to simulate the accumulation of dry N deposition, and shoot and root biomass and leaf area index (LAI) were measured every 3 months to assess how biomass production responded to chronic, dry N inputs. N inputs significantly altered aboveand below-ground standing crop, production, and LAI; however, N impacts varied over time. For chaparral, N inputs initially increased root production but suppressed shoot production; however, over time biomass partitioning reversed and plants exposed to N had significantly more shoot biomass. In CSS, N inputs caused aboveground production to increase only during wet years, and this interaction between added N and precipitation was due in part to a highly flexible growth response of CSS shrubs to increases in N and water availability and to a shift from slower-growing native shrubs to fast-growing introduced annuals. Together, these results indicate that long-term N inputs will lead to complex, spatially and temporally variable growth responses for these, and similar, Mediterranean-type shrublands. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Anthropogenic N deposition Chaparral Coastal sage scrub Long-term field experiments Mediterranean-type ecosystems N cycle
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:000593987500017
WOS关键词	COASTAL SAGE SCRUB ; ATMOSPHERIC NITROGEN DEPOSITION ; SOUTHERN-CALIFORNIA ; TERRESTRIAL ECOSYSTEMS ; NUTRIENT-ENRICHMENT ; COMMUNITY STRUCTURE ; NATIVE SHRUB ; CARBON ; FIRE ; DIVERSITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328041
作者单位	[Vourlitis, George L.; Jaureguy, Jeff; Marin, Leticia; Rodriguez, Charlton] Calif State Univ San Marcos, Dept Biol Sci, San Marcos, CA 92064 USA
推荐引用方式 GB/T 7714	Vourlitis, George L.,Jaureguy, Jeff,Marin, Leticia,et al. Shoot and root biomass production in semi-arid shrublands exposed to long -term experimental N input[J],2021,754.
APA	Vourlitis, George L.,Jaureguy, Jeff,Marin, Leticia,&Rodriguez, Charlton.(2021).Shoot and root biomass production in semi-arid shrublands exposed to long -term experimental N input.SCIENCE OF THE TOTAL ENVIRONMENT,754.
MLA	Vourlitis, George L.,et al."Shoot and root biomass production in semi-arid shrublands exposed to long -term experimental N input".SCIENCE OF THE TOTAL ENVIRONMENT 754(2021).