Determining ecosystem functioning in Brazilian biomes through foliar carbon and nitrogen concentrations and stable isoto
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Determining ecosystem functioning in Brazilian biomes through foliar carbon and nitrogen concentrations and stable isotope ratios L. A. Martinelli . G. B. Nardoto . A. Soltangheisi . G. R. G. Reis . A. L. Abdalla-Filho . P. B. Camargo . T. F. Domingues . D. Faria . A. M. Figueira . T. F. Gomes . S. R. M. Lins . S. F. Mardegan . E. Mariano . R. C. Miatto . R. Moraes . M. Z. Moreira . R. S. Oliveira . J. P. H. B. Ometto . F. L. S. Santos . J. Sena-Souza . D. M. L. Silva . J. C. S. S. Silva . A. S. Vieira Received: 29 April 2020 / Accepted: 21 October 2020 Ó Springer Nature Switzerland AG 2020
Abstract By analyzing 6,480 tree leaf samples from 57 sites within Brazilian biomes, we considered whether vegetation types in terrestrial ecosystems reflect biogeochemical diversity and whether they fit into a leaf economics spectrum (LES). To achieve this, we investigated the relations among leaf carbon (C) and nitrogen (N) concentrations, their isotope natural abundance and C:N ratio. In addition, we
Responsible Editor: Robert W. Howarth. This paper is an invited contribution to the 35th Anniversary Special Issue, edited by Sujay Kaushal, Robert Howarth,and Kate Lajtha.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10533-020-00714-2) contains supplementary material, which is available to authorized users.
tested their correlations with mean annual temperature (MAT) and precipitation (MAP), as climatic factors. We found consistent differences in the C and N concentrations and their isotopic composition among the vegetation types. MAP is the main climatic driver of changes in N, C:N ratio, d15N, and d13C, correlating negatively with N and positively with C:N ratio. These relations show that these biomes follow an LES. The Caatinga had the highest d15N values, suggesting that N residence time in soil is longer due to low leaching and plant uptake. We observed that MAP is not the only factor influencing d13C values in different biomes; instead canopy effect probably explains the highest values observed in the Cerrado. Our results reinforce earlier findings that life diversity in the tropics reflects biogeochemistry diversity and leaf d15N opens the possibility for investigating plant
L. A. Martinelli (&) A. Soltangheisi A. L. Abdalla-Filho P. B. Camargo T. F. Gomes E. Mariano M. Z. Moreira J. C. S. S. Silva Laboratory of Isotope Ecology, Center for Nuclear Energy in Agriculture, University of Sa˜o Paulo, Piracicaba, SP, Brazil e-mail: [email protected]
T. F. Domingues R. C. Miatto Department of Biology, Faculty of Philosophy, Sciences and Letters at Ribeira˜o Preto, University of Sa˜o Paulo, Ribeira˜o Preto, SP, Brazil
G. B. Nardoto F. L. S. Santos Ecology Department, Institute of Biological Sciences, University of Brası´lia, Brası´lia, DF, Brazil
D. Faria R. Moraes Applied Ecology and Conservation Laboratory, State University of Santa Cruz, Ilhe´us, BA, Brazil
G. R. G. Reis Forest Ecosystems and Socie
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