Using phenological cameras to track the green up in a cerrado savanna and its on-the-ground validation

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorAlberton, Bruna-
Autor(es): dc.creatorAlmeida, Jurandy-
Autor(es): dc.creatorHelm, Raimund-
Autor(es): dc.creatorTorres, Ricardo da S.-
Autor(es): dc.creatorMenzel, Annette-
Autor(es): dc.creatorCerdeira Morellato, Leonor Patricia-
Data de aceite: dc.date.accessioned2021-03-10T21:20:24Z-
Data de disponibilização: dc.date.available2021-03-10T21:20:24Z-
Data de envio: dc.date.issued2014-12-03-
Data de envio: dc.date.issued2014-12-03-
Data de envio: dc.date.issued2014-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.ecoinf.2013.12.011-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/112772-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/112772-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionEuropean Research Council under the European Union-
Descrição: dc.descriptionTechnische Universitat Munchen - Institute for Advanced Study-
Descrição: dc.descriptionGerman Excellence Initiative-
Descrição: dc.descriptionProcesso FAPESP: 10/52113-5-
Descrição: dc.descriptionProcesso FAPESP: 10/51307-0-
Descrição: dc.descriptionProcesso FAPESP: 07/59779-6-
Descrição: dc.descriptionCAPES: 360/11-
Descrição: dc.descriptionEuropean Research Council under the European Union282250-
Descrição: dc.descriptionPlant phenology has gained new importance in the context of global change research, stimulating the development of novel technologies for phenological observations. Regular digital cameras have been effectively used as three-channel imaging sensors, providing measures of leaf color change or phenological shifts in plants. We monitored a species rich Brazilian cerrado savanna to assess the reliability of digital images to detect leaf-changing patterns. Analysis was conducted by extracting color information from selected parts of the image named regions of interest (ROIs). We aimed to answer the following questions: (i) Do digital cameras capture leaf changes in cerrado savanna vegetation? (ii) Can we detect differences in phenological changes among species crowns and the cerrado community? (iii) Is the greening pattern detected for each species by digital camera validated by our on-the-ground leafing phenology (direct observation of tree leaf changes)? We analyzed daily sequences of five images per hour, taken from 6:00 to 18:00 h, recorded during the cerrado main leaf flushing season. We defined 24 ROIs in the original digital image, including total or partial regions and crowns of six plant species. Our results indicated that: (i) for the studied period, single plant species ROIs were more sensitive to changes in relative green values than the community ROIs, (ii) three leaf strategies could be depicted from the species' ROI patterns of green color change, and (iii) the greening patterns and leaf functional groups were validated by our on-the-ground phenology. We concluded that digital cameras are reliable tools to monitor high diverse tropical seasonal vegetation and it is sensitive to inter-species differences of leafing patterns. (C) 2014 Elsevier B.V. All rights reserved.-
Formato: dc.format62-70-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationEcological Informatics-
Relação: dc.relation1.820-
Relação: dc.relation0,778-
Direitos: dc.rightsclosedAccess-
Palavras-chave: dc.subjectLeafing-
Palavras-chave: dc.subjectLeaf traits-
Palavras-chave: dc.subjectCerrado-
Palavras-chave: dc.subjectData validation-
Palavras-chave: dc.subjectDigital camera-
Palavras-chave: dc.subjectPhenology-
Título: dc.titleUsing phenological cameras to track the green up in a cerrado savanna and its on-the-ground validation-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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