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Litterfall mass and nutrient fluxes over an altitudinal gradient in the coastal Atlantic Forest, Brazil

Published online by Cambridge University Press:  01 August 2017

Eráclito Rodrigues de Sousa-Neto ,
Sílvia Rafaela Machado Lins ,
Susian Christian Martins ,
Marisa de Cássia Piccolo ,
Maurício Lamano Ferreira ,
Plínio Barbosa de Camargo ,
Janaina Braga do Carmo ,
Edmar Antonio Mazzi ,
Benjamin Z. Houlton  and
Luiz Antonio Martinelli Open the ORCID record for Luiz Antonio Martinelli [Opens in a new window]
Eráclito Rodrigues de Sousa-Neto
Affiliation:
Instituto Nacional de Pesquisas Espaciais - INPE, Av. dos Astronautas 1758, São José dos Campos-SP, Brasil
Sílvia Rafaela Machado Lins*
Affiliation:
Centro de Energia Nuclear na Agricultura, Av. Centenário 303, Piracicaba-SP, Brasil
Susian Christian Martins
Affiliation:
Centro de Agronegócio da Fundação Getúlio Vargas, Rua Itapeva, 474, São Paulo-SP, Brasil
Marisa de Cássia Piccolo
Affiliation:
Centro de Energia Nuclear na Agricultura, Av. Centenário 303, Piracicaba-SP, Brasil
Maurício Lamano Ferreira
Affiliation:
Universidade Nove de Julho, Departamento de Ciências da Saúde, Av. Adolfo Pinto, 109, São Paulo – SP, Brasil
Plínio Barbosa de Camargo
Affiliation:
Centro de Energia Nuclear na Agricultura, Av. Centenário 303, Piracicaba-SP, Brasil
Janaina Braga do Carmo
Affiliation:
Universidade Federal de São Carlos, Campus de Sorocaba, SP, Brazil
Edmar Antonio Mazzi
Affiliation:
Centro de Energia Nuclear na Agricultura, Av. Centenário 303, Piracicaba-SP, Brasil
Benjamin Z. Houlton
Affiliation:
University of California, Davis – One Shields Avenue, Davis, CA, USA
Luiz Antonio Martinelli
Affiliation:
Centro de Energia Nuclear na Agricultura, Av. Centenário 303, Piracicaba-SP, Brasil
*
*Corresponding author. Email: silviarafaela@usp.br
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Abstract:

Litterfall is one of the most important pathways through which nutrients are recycled in the terrestrial biosphere. In tropical soils, which are generally low in essential nutrients such as phosphorus and cations, the flux of nutrients through litterfall is particularly important to sustaining CO2-uptake capacity; however, questions remain over the role of altitude in altering litter nutrient cycling rates among tropical forest ecosystems. Here we examine litterfall, carbon (C), nitrogen (N) and phosphorus (P) fluxes through litterfall over an altitudinal gradient in the coastal Atlantic Forest located on the northern coast of the State of São Paulo, Brazil. Litterfall was collected twice a month for 1 y (April 2007–March 2008) using 30 litter traps placed in four different forest types arrayed by altitude – coastal forest (sea level), lowland forest (50–200 m asl), submontane forest (300–500 m asl) and montane forest (1000 m asl). Litterfall mass-fluxes decreased with increasing altitude, from ~9 Mg ha−1 in lowland forests to 7 Mg ha−1 in higher-altitude ecosystems. Contribution of reproductive organs to litterfall was significantly greater in lower than in higher altitudes. Litterfall N and P fluxes were higher in the lowland forest vs. other forest types, pointing to strong altitudinal controls over nutrient cycling. Furthermore, nitrogen-use efficiency (NUE) was lower and litter δ15N was higher in the lowland site providing additional evidence for lack of N constraints to productivity in lowland of the south-eastern Atlantic Forest.

Keywords

altitudinal rangeAtlantic ForestBrazillitterfallnitrogennutrient inputphosphorus
Type
Research Article
Information
Journal of Tropical Ecology , Volume 33 , Issue 4 , July 2017 , pp. 261 - 269
Copyright
Copyright © Cambridge University Press 2017 

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References

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