Nitrogen Interactions and Photosynthetic Responses to CO{sub 2}: Work Plan for Biocon Experiment/Physiological Measurements at Cedar Creek

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Nitrogen plays a critical role in photosynthetic function, which in turn can affect many ecosystem processes through its effects on plant growth and ecosystem carbon cycles. As a result of its central role in photosynthetic enzymes, leaf N status can affect the magnitude of photosynthetic enhancement by elevated CO{sub 2}. It is now well-recognized that species responses to elevated CO{sub 2} may be different when species are grown in isolation vs. in a mixed community. Part of this effect may result from effects on leaf N itself as a result of species competition for N in N-limited ecosystems, and part ... continued below

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4 p.

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Ellsworth, D. December 31, 1998.

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Description

Nitrogen plays a critical role in photosynthetic function, which in turn can affect many ecosystem processes through its effects on plant growth and ecosystem carbon cycles. As a result of its central role in photosynthetic enzymes, leaf N status can affect the magnitude of photosynthetic enhancement by elevated CO{sub 2}. It is now well-recognized that species responses to elevated CO{sub 2} may be different when species are grown in isolation vs. in a mixed community. Part of this effect may result from effects on leaf N itself as a result of species competition for N in N-limited ecosystems, and part of the effect is simply a function of dilution of leaf nutrients in leaves with greater carbohydrates as a result of elevated CO{sub 2}. However, photosynthetic efficiency itself may be affected if N-limited plants reallocate N within leaves away from carboxylation functions under elevated CO{sub 2} compared to ambient plants (Drake et al. 1997). Thus while there is cause to believe that there are interactive effects of N and CO{sub 2} on species photosynthetic physiology, there is little experimental data to support or reject this idea, particularity in realistic ecosystems under field conditions.

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4 p.

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OSTI as DE00006231

Medium: P; Size: 4 pages

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  • Other Information: PBD: 31 Dec 1998

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  • Report No.: BNL-66143
  • Report No.: KP-12-02-02
  • Grant Number: AC02-98CH10886
  • DOI: 10.2172/6231 | External Link
  • Office of Scientific & Technical Information Report Number: 6231
  • Archival Resource Key: ark:/67531/metadc697551

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  • December 31, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 10, 2017, 7:58 p.m.

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Ellsworth, D. Nitrogen Interactions and Photosynthetic Responses to CO{sub 2}: Work Plan for Biocon Experiment/Physiological Measurements at Cedar Creek, report, December 31, 1998; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc697551/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.