Arid
DOI10.1016/j.jaridenv.2011.03.003
Nitrogen limitation in arid-subhumid ecosystems: A meta-analysis of fertilization studies
Yandjian, L.1; Gherardi, L.2,3; Sala, O. E.2,3
通讯作者Yandjian, L.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
出版年2011
卷号75期号:8页码:675-680
英文摘要

Evidence supporting water limitation in arid-semiarid ecosystems includes strong correlations between aboveground net primary production (ANPP) and annual precipitation as well as results from experimental water additions. Similarly, there is evidence of N limitation on ANPP in low precipitation ecosystems, but is this a widespread phenomenon? Are all arid-semiarid ecosystems equally limited by nitrogen? Is the response of N fertilization modulated by water availability?


We conducted a meta-analysis of ANPP responses to N fertilization across arid to subhumid ecosystems to quantify N limitation, using the effect-size index R which is the ratio of ANPP in fertilized to control plots. Nitrogen addition increased ANPP across all studies by an average of 50%, and nitrogen effects increased significantly (P = 0.03) along the 50-650 mm yr(-1) precipitation gradient. The response ratio decreased with mean annual temperature in arid and semiarid ecosystems but was insensitive in subhumid systems. Sown pastures showed significant (P = 0.007) higher responses than natural ecosystems. Neither plant-life form nor chemical form of the applied fertilizer showed significant effects on the primary production response to N addition. Our results showed that nitrogen limitation is a widespread phenomenon in low-precipitation ecosystems and that its importance increases with annual precipitation from arid to subhumid regions. Both water and N availability limit primary production, probably at different times during the year; with frequency of N limitation increasing and frequency of water limitation decreasing as annual precipitation increases. Expected increase N deposition, which could be significant even in arid ecosystems, would increase aboveground net primary production in water-limited ecosystems that account for 40% of the terrestrial surface. (C) 2011 Elsevier Ltd. All rights reserved.


英文关键词Arid ecosystems Meta-analysis Nitrogen fertilization Primary production Resource limitation
类型Review
语种英语
国家Argentina ; USA
收录类别SCI-E
WOS记录号WOS:000291624200001
WOS关键词NET PRIMARY PRODUCTIVITY ; NORTHERN CHIHUAHUAN DESERT ; TERRESTRIAL ECOSYSTEMS ; TEMPORAL VARIATION ; UNITED-STATES ; PRECIPITATION ; GRASSLAND ; WATER ; MINERALIZATION ; RAINFALL
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/168889
作者单位1.Univ Buenos Aires, Fac Agron, Dept Ecol, Inst Agr Plant Physiol & Ecol IFEVA,CONICET, RA-1417 Buenos Aires, DF, Argentina;
2.Arizona State Univ, Sch Life Sci, Tempe, AZ USA;
3.Arizona State Univ, Sch Sustainabil, Tempe, AZ USA
推荐引用方式
GB/T 7714
Yandjian, L.,Gherardi, L.,Sala, O. E.. Nitrogen limitation in arid-subhumid ecosystems: A meta-analysis of fertilization studies[J]. Arizona State University,2011,75(8):675-680.
APA Yandjian, L.,Gherardi, L.,&Sala, O. E..(2011).Nitrogen limitation in arid-subhumid ecosystems: A meta-analysis of fertilization studies.JOURNAL OF ARID ENVIRONMENTS,75(8),675-680.
MLA Yandjian, L.,et al."Nitrogen limitation in arid-subhumid ecosystems: A meta-analysis of fertilization studies".JOURNAL OF ARID ENVIRONMENTS 75.8(2011):675-680.
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