Arid
DOI10.1007/s11104-009-0048-4
Seasonal variations in plant nitrogen relations and photosynthesis along a grassland to shrubland gradient in Owens Valley, California
Goedhart, C. M.1; Pataki, D. E.1,2; Billings, S. A.3
通讯作者Goedhart, C. M.
来源期刊PLANT AND SOIL
ISSN0032-079X
EISSN1573-5036
出版年2010
卷号327期号:1-2页码:213-223
英文摘要

Community composition in semi-arid ecosystems has largely been explained by water availability; however, nitrogen is a common limiting nutrient, and may be an important control on plant function and carbon uptake. We investigated nitrogen relations and photosynthesis of several dominant species at shallow groundwater sites in Owens Valley, California. We measured soil nitrogen (N) availability, leaf N and isotopes, water isotopes, and gas exchange of dominant shrub species Atriplex torreyi and Ericameria nauseosa and grass species Distichlis spicata throughout the summer season in three sites that had similar watertable depths, but that varied in community composition and N availability. Surface soil inorganic N was greatest at the grassland site and declined from June to September at all sites. Leaf N declined throughout the season in all species, and was correlated with soil inorganic N. Photosynthesis of A. torreyi remained relatively constant throughout the season. In contrast, D. spicata and E. nauseosa experienced seasonal declines in photosynthesis at sites with greater inorganic N availability. Leaf N was significantly correlated with photosynthesis in D. spicata across all sites and measurement periods. Controls on N cycling are likely to be an important determinant of photosynthesis of D. spicata in this region.


英文关键词Atriplex torreyi Distichlis spicata Ericameria nauseosa Great Basin Desert Nitrogen relations Photosynthesis
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000273754800017
WOS关键词SOIL-WATER POTENTIALS ; COLD DESERT COMMUNITY ; GREAT-BASIN ; CHRYSOTHAMNUS-NAUSEOSUS ; SUMMER PRECIPITATION ; PATAGONIAN MONTE ; ROOT RESPONSES ; PREDAWN PLANT ; N CAPTURE ; PULSES
WOS类目Agronomy ; Plant Sciences ; Soil Science
WOS研究方向Agriculture ; Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/165983
作者单位1.Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92697 USA;
2.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA;
3.Univ Kansas, Kansas Biol Survey, Dept Ecol & Evolutionary Biol, Lawrence, KS 66047 USA
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GB/T 7714
Goedhart, C. M.,Pataki, D. E.,Billings, S. A.. Seasonal variations in plant nitrogen relations and photosynthesis along a grassland to shrubland gradient in Owens Valley, California[J],2010,327(1-2):213-223.
APA Goedhart, C. M.,Pataki, D. E.,&Billings, S. A..(2010).Seasonal variations in plant nitrogen relations and photosynthesis along a grassland to shrubland gradient in Owens Valley, California.PLANT AND SOIL,327(1-2),213-223.
MLA Goedhart, C. M.,et al."Seasonal variations in plant nitrogen relations and photosynthesis along a grassland to shrubland gradient in Owens Valley, California".PLANT AND SOIL 327.1-2(2010):213-223.
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