Convergence of soil nitrogen isotopes across global climate gradients

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Show simple item record Craine, J. M. Elmore, A. J. Wang, L. X. Augusto, L. Baisden, W. T. Brookshire, E. N. J. Cramer, M. D. Hasselquist, N. J. Hobbie, E. A. Kahmen, A. Koba, K. Kranabetter, J. M. Mack, M. C. Marin-Spiotta, E. Mayor, J. R. McLauchlan, Kendra K. 2016-04-04T22:46:14Z 2016-04-04T22:46:14Z 2015-02-06 2014-11-01
dc.description Citation: Craine, J. M., Elmore, A. J., Wang, L. X., Augusto, L., Baisden, W. T., Brookshire, E. N. J., . . . Zeller, B. (2015). Convergence of soil nitrogen isotopes across global climate gradients. Scientific Reports, 5, 8. doi:10.1038/srep08280
dc.description Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems, and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the N-15 : N-14 ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of N cycling. In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual temperature (MAT), mean annual precipitation (MAP), and the concentrations of organic carbon and clay in soil. In both hot ecosystems and dry ecosystems, soil organic matter was more enriched in N-15 than in corresponding cold ecosystems or wet ecosystems. Below a MAT of 9.8 degrees C, soil delta N-15 was invariant with MAT. At the global scale, soil organic C concentrations also declined with increasing MAT and decreasing MAP. After standardizing for variation among mineral soils in soil C and clay concentrations, soil delta N-15 showed no consistent trends across global climate and latitudinal gradients. Our analyses could place new constraints on interpretations of patterns of ecosystem N cycling and global budgets of gaseous N loss.
dc.description Additional Authors: Michelsen, A.;Nardoto, G. B.;Oliveira, R. S.;Perakis, S. S.;Peri, P. L.;Quesada, C. A.;Richter, A.;Schipper, L. A.;Stevenson, B. A.;Tumer, B. L.;Viani, R. A. G.;Wanek, W.;Zeller, B.
dc.rights Attribution 4.0 International (CC BY 4.0)
dc.subject N-15 Natural-Abundance
dc.subject Organic-Matter
dc.subject Litter Decomposition
dc.subject Inorganic
dc.subject Nitrogen
dc.subject Tropical Forests
dc.title Convergence of soil nitrogen isotopes across global climate gradients
dc.type Article 2015
dc.citation.doi 10.1038/srep08280
dc.citation.issn 2045-2322
dc.citation.jtitle Scientific Reports
dc.citation.spage 8
dc.citation.volume 5
dc.contributor.authoreid mclauch

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Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, the use of this item is bound by the following: Attribution 4.0 International (CC BY 4.0)

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