An analysis of the seasonality of surface energy and carbon fluxes in an ecosystem of native fields inserted in the Pampa biome

Authors

  • Ricardo Acosta Universidade Federal de Santa Maria, RS
  • Debora Regina Roberti Universidade Federal de Santa Maria, RS
  • Gisele Cristina Dotto Rubert Universidade Federal de Santa Maria, RS
  • Marcelo Bortoluzzi Diaz Universidade Federal de Santa Maria, RS
  • Iván Cely Universidade Federal de Santa Maria, RS
  • Osvaldo Moraes Centro Nacional de Monitoramento e Alertas de Desastres Naturais

DOI:

https://doi.org/10.5902/2179460X30722

Keywords:

Energy fluxes, CO2 fluxes, Pampa biome

Abstract

In this study, the eddy-covariance technique was used to estimate the surface fluxes of carbon (CO2) and energy, in the latent (LE) and sensible (H) forms, over a native field ecosystem (pasture). The results show that the ecosystem in question presents a predominant seasonality in its ecological functioning, especially regarding the observations of the LE and CO2 fluxes, with carbon assimilation and evapotranspiration with maximum values during the summer. During the winter season observations point to a lower metabolic state of the ecosystem, with almost zero carbon assimilation (even a carbon source signal inversion) and the evapotranspiration rate falling to 60% of its value in the highest state metabolic activity.

Downloads

Download data is not yet available.

References

Aubinet, M., Vesala, T., Papale, D. In: Eddy Covariance. Dordrecht: Springer, 2012. doi:10.1007/978-94-007-2351-1

Beer, C. Reichstein, M., Tomelleri, E., Ciais, P., JUNG, M., Carvalhais, N., Rodenbeck, C., Arain, M. A., Baldochii, D., Bonan, G. B., Bondeau, A., Cescatti, A., Lasslop, G., Lindroth, A., Lomas, M., Luyssaert, S., Margolis, H., Oleson, K. W., Roupsard, O., Veenendaal, E., Viovy, N., Williams, C., Woodward, F. I., e Papale, D. Terrestrial Gross Carbon Dioxide Uptake: Global Distribution and Covariation with Climate, Science, vol. 329, n. 5993, pp. 834 - 838, 2010.

Foken, T., Leuning, R., Oncley, S.R., Mauder, M., Aubinet, M. Corrections and Data Quality Control In: Eddy Covariance. Dordrecht: Springer, 2012, pp. 85–131. doi:10.1007/978-94-007-2351-1_4

IBGE. Manual Técnico da Vegetação Brasileira. Instituto Brasileiro de Geografia e Estatística – IBGE, 2012. ISSN 0101-4234

Lima, M. A., Boddey, R., Rodrigues, B., Machado, P. , Urquiaga, S. Estoques de carbono e emissões de gases de efeito estufa na agropecuária brasileira. Brasília: Embrapa, 2012, 343 p.

Lipinskil, V.; Santos, T. Structure and spatial organization of two anuran communities of the Pampa biome. Iheringia Série Zoologia, vol.104, n.4, 2014.

Magnani F., Mencuccini M., Borghetti M., Berbigier P., Berninger F., Delzon S., Grace J. The human footprint in the carbon cycle of temperate and boreal forests. Nature, 447, 849–851, 2007.

Moncrieff, J., Clement, R., Finnigan, J., Meyers, T. Averaging, Detrending, and Filtering of Eddy Covariance Time Series, In: Handbook of Micrometeorology. Dordrecht : Kluwer Academic Publishers, pp. 7–31, 2004.

Nimer, E.. Climatologia do Brasil. Rio de Janeiro, RJ. IBGE, 1989.

Quadros, F.L.F., Pillar V.P. Dinâmica vegetacional em pastagem natural submetida a tratamentos de queima e pastejo. Ciência Rural 31: 863-868, 2001

Reichstein, M., Falge, E., Baldocchi, D., Papale, D., Aubinet, M., Berbigier, P., Bernhofer, C., Buchmann, N., Gilmanov, T., Granier, A., Grünwald, T., Havránková, K., Ilvesniemi, H., Janous, D., Knohl, A., Laurila, T., Lohila, A., Loustau, D., Matteucci, G., Meyers, T., Miglietta, F., Ourcival, J.-M., Pumpanen, J., Rambal, S., Rotenberg, E., Sanz, M., Tenhunen, J., Seufert, G., Vaccari, F., Vesala, T., Yakir, D. and Valentini, R. On the separation of net ecosystem exchange into assimilation and ecosystem respiration: review and improved algorithm. Global Change Biology, 11: 1424–1439, 2005 doi:10.1111/j.1365-2486.2005.001002.x

Stocker, T., Qin, D., Plattner, G., Alexander, L., Allen, S., Bindoff, N., Bréon, F., Church, J., Cubasch, U., Emori, S., Forster, P., Friedlingstein, P. Gillett, N., Gregory, J., Hartmann, D., Jansen, E., Kirtman, B., Knutti, R., Kumar, K., Lemke, P., Marotzke, J., Masson-Delmotte, V., Meehl, G., Mokhov, I., Piao, S., Ramaswamy, V., Randall, D., Rhein, M., Rojas, M., Sabine, C., Shindell, D., Talley, L., Vaughan, D. e Xie,S.: Technical summary. In Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, 2013, 33-115, doi:10.1017/CBO9781107415324.005.

Published

2018-03-22

How to Cite

Acosta, R., Roberti, D. R., Rubert, G. C. D., Diaz, M. B., Cely, I., & Moraes, O. (2018). An analysis of the seasonality of surface energy and carbon fluxes in an ecosystem of native fields inserted in the Pampa biome. Ciência E Natura, 40, 132–137. https://doi.org/10.5902/2179460X30722

Most read articles by the same author(s)

1 2 3 4 5 6 > >>