Use este identificador para citar ou linkar para este item: http://repositorio.inpa.gov.br/handle/123/1815
Título: Convergence of soil nitrogen isotopes across global climate gradients
Autor(es): CRAINE, JOSEPH M.
ELMORE, ANDREW J.
WANG, LIXIN
AUGUSTO, LAURENT
BAISDEN, W. TROY
BROOKSHIRE, E. N. J.
CRAMER, MICHAEL D.
HASSELQUIST, NILES J.
HOBBIE, ERIK A.
KAHMEN, ANSGAR
KOBA, KEISUKE
KRANABETTER, J. MARTY
MACK, MICHELLE C.
MARIN-SPIOTTA, ERIKA
MAYOR, JORDAN R.
MCLAUCHLAN, KENDRA K.
MICHELSEN, ANDERS
NARDOTO, GABRIELA B.
OLIVEIRA, RAFAEL S.
PERAKIS, STEVEN S.
PERI, PABLO L.
Carlos Alberto Nobre Quesada
RICHTER, ANDREAS
SCHIPPER, LOUIS A.
STEVENSON, BRYAN A.
TURNER, BENJAMIN L.
VIANI, RICARDO A. G.
WANEK, WOLFGANG
ZELLER, BERND
ISSN: 2045-2322
Revista: Scientific Reports
Volume: 5
Resumo: 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.
URI: http://repositorio.inpa.gov.br/handle/123/1815
ISSN: 2045-2322
DOI: https://dx.doi.org/10.1038/srep08280
Aparece nas coleções:Coordenação de Dinâmica Ambiental (CDAM)

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