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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MetadadosDescriçãoIdioma
Autor(es): dc.contributorFederal Rural University of Pernambuco-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorSerra Talhada 56909-535-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.contributorSão José dos Campos-
Autor(es): dc.contributorPólo II - Universidade de Coimbra-
Autor(es): dc.contributorUniversity of Florida-
Autor(es): dc.creatorJardim, Alexandre Maniçoba da Rosa Ferraz-
Autor(es): dc.creatorMorais, José Edson Florentino de-
Autor(es): dc.creatorSouza, Luciana Sandra Bastos de-
Autor(es): dc.creatorMarin, Fabio Ricardo-
Autor(es): dc.creatorMoura, Magna Soelma Beserra de-
Autor(es): dc.creatorMorellato, Leonor Patricia Cerdeira-
Autor(es): dc.creatorMontenegro, Abelardo Antônio de Assunção-
Autor(es): dc.creatorOmetto, Jean Pierre Henry Balbaud-
Autor(es): dc.creatorde Lima, João L.M.P.-
Autor(es): dc.creatorDubeux Júnior, José Carlos Batista-
Autor(es): dc.creatorSilva, Thieres George Freire da-
Data de aceite: dc.date.accessioned2025-08-21T15:12:59Z-
Data de disponibilização: dc.date.available2025-08-21T15:12:59Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-10-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jhydrol.2023.130121-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/305025-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/305025-
Descrição: 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).-
Descrição: dc.descriptionDepartment of Agricultural Engineering Federal Rural University of Pernambuco, Pernambuco-
Descrição: dc.descriptionDepartment of Biodiversity Institute of Bioscience São Paulo State University—UNESP, São Paulo-
Descrição: dc.descriptionAcademic Unit of Serra Talhada Federal Rural University of Pernambuco Serra Talhada 56909-535, Pernambuco-
Descrição: dc.descriptionDepartment of Biosystems Engineering University of São Paulo College of Agriculture “Luiz de Queiroz” – Esalq-
Descrição: dc.descriptionBrazilian Agricultural Research Corporation Embrapa Semiarid, Pernambuco-
Descrição: dc.descriptionNational Institute for Space Research—INPE São José dos Campos, SP, 12227-010-
Descrição: dc.descriptionMARE—Marine and Environmental Sciences Centre ARNET – Aquatic Research Network Department of Civil Engineering Faculty of Sciences and Technology University of Coimbra Rua Luís Reis Santos Pólo II - Universidade de Coimbra-
Descrição: dc.descriptionNorth Florida Research and Education Center University of Florida, 3925 Highway 71-
Descrição: dc.descriptionDepartment of Biodiversity Institute of Bioscience São Paulo State University—UNESP, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationJournal of Hydrology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCAM plant-
Palavras-chave: dc.subjectEddy covariance-
Palavras-chave: dc.subjectEvapotranspiration-
Palavras-chave: dc.subjectNet ecosystem CO2 exchange-
Palavras-chave: dc.subjectRainfed cactus-
Título: 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-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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