Sink or carbon source? how the Opuntia cactus agroecosystem interacts in the use of carbon, nutrients and radiation in the Brazilian semi-arid region.

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dc.contributorALEXANDRE MANIÇOBA DA ROSA FERRAZ JARDIM, UFRPE
dc.contributorJOSÉ EDSON FLORENTINO DE MORAIS, UFRPE, Serra Talhada, PE
dc.contributorLUCIANA SANDRA BASTOS DE SOUZA, UFRPE, Serra Talhada, PE
dc.contributorFABIO RICARDO MARIN, USP
dc.contributorMAGNA SOELMA BESERRA DE MOURA, CPATSA
dc.contributorLEONOR PATRICIA CERDEIRA MORELLATO, UNESP, Rio Claro, SP
dc.contributorABELARDO ANTÔNIO DE ASSUNÇÃO MONTENEGRO, UFRPE
dc.contributorJEAN PIERRE HENRY BALBAUD OMETTO, INPE
dc.contributorJOÃO L. M. P. DE LIMA, MARE—Marine and Environmental Sciences Centre, ARNET – Aquatic Research Network, Department of Civil Engineering, Faculty of Sciences and Technology
dc.contributorJOSÉ CARLOS BATISTA DUBEUX JÚNIOR, North Florida Research and Education Center, University of Florida
dc.contributorTHIERES GEORGE FREIRE DA SILVA, Department of Agricultural Engineering, Federal Rural University of Pernambuco, Serra Talhada, PE.
dc.creatorJARDIM, A. M. da R. F.
dc.creatorMORAIS, J. E. F. de
dc.creatorSOUZA, L. S. B. de
dc.creatorMARIN, F. R.
dc.creatorMOURA, M. S. B. de
dc.creatorMORELLATO, L. P. C.
dc.creatorMONTENEGRO, A. A. de A.
dc.creatorOMETTO, J. P. H. B.
dc.creatorLIMA, J. L. M. P. de
dc.creatorDUBEUX JÚNIOR, J. C. B.
dc.creatorSILVA, T. G. F. da
dc.date2024-01-19T11:33:32Z
dc.date2024-01-19T11:33:32Z
dc.date2024-01-18
dc.date2023
dc.date.accessioned2026-07-07T05:58:32Z
dc.descriptionAnthropogenic disturbances directly influence environmental processes and increase the concentration of carbon (C) in the atmosphere. Here, we compare the differences in the seasonality of the balance of carbon, energy, and radiation, as well as seek to identify the interrelationships between these environmental variables and their impact on the growth of Opuntia cactus. Data were acquired from an eddy covariance flux tower over a cactus crop agroecosystem (2019–2021) in the Brazilian semi-arid region. In addition, we use plant growth rates, carbon and nutrient stocks, evapotranspiration (ET) and water use efficiency (WUE), and radiation (RUE). We show that the closure of the surface energy balance was 71%, although there are minimal fluxes of available energy lost (29%) by unquantified processes. At all seasons, the highest net ecosystem CO2 exchange (NEE) rate was between 11:00–13:00 (�� 5.75 μmol m�� 2 s�� 1). During the dry and wet-dry season, there was the lowest daily gross primary productivity (GPP) (2.5 μmol m�� 2 s�� 1) and net radiation—Rn (217.97 W m�� 2). Ecosystem respiration was more expressive during the wet season (2.41 μmol m�� 2 s�� 1), and maximum diurnal value of 2.65 μmol m�� 2 s�� 1. Furthermore, the latent heat flux was higher during the wet season (114.68 W m�� 2) and lowered in the dry season (9.39 W m�� 2). The net assimilation rate showed higher values during the dry-wet transition. The dry season presented higher nutrient use efficiency and WUE (14.77 g m�� 2 mm�� 1). The highest ET occurred during the wet season (227 mm), and RUE was 81.48% higher than in the dry season. Overall, the cactus was a potential C sink during the three years of assessment (NEE: �� 377 g C m�� 2 year�� 1; GPP: 881 g C m�� 2 year�� 1). The results help us to understand that most of the Rn energy is used in the sensible heat flux (58% ratio).
dc.identifierJournal of Hydrology, v. 625, 130121, 2023.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1161040
dc.identifierhttps://doi.org/10.1016/j.jhydrol.2023.130121
dc.identifier.urihttp://hdl.handle.net/123456789/503701
dc.languageeng
dc.rightsopenAccess
dc.subjectOpuntia cactus
dc.subjectAgroecossistema
dc.subjectConcentração de carbono
dc.subjectCovariância de redemoinho
dc.subjectCacto de sequeiro
dc.subjectTroca líquida de CO2
dc.subjectPlanta CAM
dc.subjectSemiárido
dc.subjectSumidouro ou fonte de carbono
dc.subjectCaatinga
dc.subjectCarbono
dc.subjectCacto
dc.subjectEcossistema
dc.subjectEvapotranspiração
dc.subjectOpuntia
dc.subjectEvapotranspiration
dc.titleSink or carbon source? how the Opuntia cactus agroecosystem interacts in the use of carbon, nutrients and radiation in the Brazilian semi-arid region.
dc.typeArtigo de periódico

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