Arid
DOI10.1890/ES11-00305.1
Short-term effects of elevated precipitation and nitrogen on soil fertility and plant growth in a Neotropical savanna
Copeland, Stella M.1; Bruna, Emilio M.1,2; Barbosa Silva, Laura V.1,4; Mack, Michelle C.3; Vasconcelos, Heraldo L.4
通讯作者Copeland, Stella M.
来源期刊ECOSPHERE
ISSN2150-8925
出版年2012
卷号3期号:4
英文摘要

Increasing nitrogen (N) deposition and changing precipitation patterns in Neotropical savannas could alter plant growth, reproduction, and nutrients by altering soil nutrient and water availability. We examined the potential for simulated N deposition and increased dry season precipitation to have interactive effects on reproduction and growth of two abundant native Cerrado (Brazilian savanna) grasses-Loudetiopsis chrysothrix and Tristachya leiostachya-via feedbacks with soil nutrient status. Plant growth and reproduction responses consistently varied by species. Water addition led to more consistent increases in both growth and reproduction than nitrogen addition and the two treatments did have significant interactive effects. We expected that both treatments would affect plant growth and reproduction via positive effects on soil and plant N. Instead, we found that plant responses were linked to species-specific treatment effects on soil and foliar phosphorus (P). Structural equation models (SEM) confirmed that changes in soil P-rather than changes in soil N or increasing soil acidity-explained plant response to treatments. Our results imply that N deposition and precipitation change could impact Cerrado plant growth and reproduction via subtle effects on plant and soil phosphorus.


英文关键词Brazil bunchgrass Cerrado Loudetiopsis chrysothrix nitrogen enrichment phosphorus precipitation change savanna soil fertility Tristachya leiostachya
类型Article
语种英语
国家USA ; Brazil
收录类别SCI-E
WOS记录号WOS:000327301200004
WOS关键词NUTRIENT LIMITATION ; PRIMARY PRODUCTIVITY ; GRASSLAND RESPONSES ; CHIHUAHUAN DESERT ; BRAZILIAN CERRADO ; N-MINERALIZATION ; CARBON-DIOXIDE ; GLOBAL CHANGES ; PATH-ANALYSIS ; DEPOSITION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构University of California, Davis
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/172091
作者单位1.Univ Florida, Dept Wildlife Ecol & Conservat, Gainesville, FL 32611 USA;
2.Univ Florida, Ctr Latin Amer Studies, Gainesville, FL 32611 USA;
3.Univ Florida, Dept Biol, Gainesville, FL 32611 USA;
4.Univ Fed Uberlandia, Inst Biol, BR-38400902 Uberlandia, MG, Brazil
推荐引用方式
GB/T 7714
Copeland, Stella M.,Bruna, Emilio M.,Barbosa Silva, Laura V.,et al. Short-term effects of elevated precipitation and nitrogen on soil fertility and plant growth in a Neotropical savanna[J]. University of California, Davis,2012,3(4).
APA Copeland, Stella M.,Bruna, Emilio M.,Barbosa Silva, Laura V.,Mack, Michelle C.,&Vasconcelos, Heraldo L..(2012).Short-term effects of elevated precipitation and nitrogen on soil fertility and plant growth in a Neotropical savanna.ECOSPHERE,3(4).
MLA Copeland, Stella M.,et al."Short-term effects of elevated precipitation and nitrogen on soil fertility and plant growth in a Neotropical savanna".ECOSPHERE 3.4(2012).
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