Artículo

Kozovits, A.R.; Bustamante, M.M.C.; Garofalo, C.R.; Bucci, S.; Franco, A.C.; Goldstein, G.; Meinzer, F.C. "Nutrient resorption and patterns of litter production and decomposition in a Neotropical Savanna" (2007) Functional Ecology. 21(6):1034-1043
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Abstract:

1. Deposition of nutrients due to anthropogenic activities has the potential to change nutrient availability in nutrient-limited ecosystems with consequences for plant and ecosystem processes. 2. Species-specific and ecosystem responses to the addition of nutrients were studied in a field experiment conducted in a Savanna (Cerrado sensu stricto) on dystrophic soil in central Brazil. Three fertilization treatments (N, P and N plus P additions) and unfertilized control were replicated in four 15 x 15 m plots per treatment. 3. Five of the dominant woody species were studied. Specific leaf area (SLA) was not affected by the treatments, but species responded differently in terms of foliar nutrient concentration, resorption efficiency and proficiency to the increased soil N and P availability. 4. Responses of N and P resorption suggested different levels of regulation for these two limiting elements, with a decrease in N and P resorption proficiency depending on the treatment. In general, under N fertilization, senesced leaves presented higher N concentration, whereas combined fertilization with N and P resulted in senesced leaves richer in P. The concomitant variation in P resorption efficiency and proficiency indicates a stronger regulation between them compared to N. 5. Results indicated a highly efficient and complete P resorption, while N concentrations in senesced leaves indicated intermediate or incomplete resorption efficiencies, supporting the idea that Cerrado plants might be more limited by P than by N. 6. At the ecosystem level, higher N concentration in the leaf litter was measured at the end of the dry season in the +NP-fertilized plots, resulting in a significantly faster decomposition rate in relation to the control treatment. Responses of litterfall and decomposition rates indicated that the system was generally more responsive to the combined addition of N and P than to fertilization with N or P alone over the relatively short time span of this study. © 2007 The Authors.

Registro:

Documento: Artículo
Título:Nutrient resorption and patterns of litter production and decomposition in a Neotropical Savanna
Autor:Kozovits, A.R.; Bustamante, M.M.C.; Garofalo, C.R.; Bucci, S.; Franco, A.C.; Goldstein, G.; Meinzer, F.C.
Filiación:Departamento de Ecologia, Universidade de Brasília, Brasília, DF 70919-970, Brazil
Laboratorio de Ecología Funcional, Departamento de Ecologia, Genetica Y Evolucion, Ciudad Universitaria, Nuñez, Buenos Aires, Argentina
Departamento de Botânica, Universidade de Brasília, Brasília, DF 70919-970, Brazil
Department of Biology, University of Miami, P.O. Box 249118, Coral Gables, FL 33124, United States
USDA Forest Service, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR 97331, United States
Departamento de Ciências Biológicas, Universidade Federal de Ouro Preto, Campus Morro Do Cruzeiro, Ouro Preto - MG, 35400-000, Brazil
Palabras clave:Cerrado; Fertilization; N : P ratio; Nitrogen and phosphorus resorption; cerrado; concentration (composition); decomposition; fertilizer application; human activity; leaf area; litter; litterfall; Neotropical region; nutrient availability; nutrient uptake; resorption; savanna; woody plant
Año:2007
Volumen:21
Número:6
Página de inicio:1034
Página de fin:1043
DOI: http://dx.doi.org/10.1111/j.1365-2435.2007.01325.x
Título revista:Functional Ecology
Título revista abreviado:Funct. Ecol.
ISSN:02698463
CODEN:FECOE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02698463_v21_n6_p1034_Kozovits

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Citas:

---------- APA ----------
Kozovits, A.R., Bustamante, M.M.C., Garofalo, C.R., Bucci, S., Franco, A.C., Goldstein, G. & Meinzer, F.C. (2007) . Nutrient resorption and patterns of litter production and decomposition in a Neotropical Savanna. Functional Ecology, 21(6), 1034-1043.
http://dx.doi.org/10.1111/j.1365-2435.2007.01325.x
---------- CHICAGO ----------
Kozovits, A.R., Bustamante, M.M.C., Garofalo, C.R., Bucci, S., Franco, A.C., Goldstein, G., et al. "Nutrient resorption and patterns of litter production and decomposition in a Neotropical Savanna" . Functional Ecology 21, no. 6 (2007) : 1034-1043.
http://dx.doi.org/10.1111/j.1365-2435.2007.01325.x
---------- MLA ----------
Kozovits, A.R., Bustamante, M.M.C., Garofalo, C.R., Bucci, S., Franco, A.C., Goldstein, G., et al. "Nutrient resorption and patterns of litter production and decomposition in a Neotropical Savanna" . Functional Ecology, vol. 21, no. 6, 2007, pp. 1034-1043.
http://dx.doi.org/10.1111/j.1365-2435.2007.01325.x
---------- VANCOUVER ----------
Kozovits, A.R., Bustamante, M.M.C., Garofalo, C.R., Bucci, S., Franco, A.C., Goldstein, G., et al. Nutrient resorption and patterns of litter production and decomposition in a Neotropical Savanna. Funct. Ecol. 2007;21(6):1034-1043.
http://dx.doi.org/10.1111/j.1365-2435.2007.01325.x