Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0140-1963 |
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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