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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
09/03/2018 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
THOMAS, E.; VALDIVIA, J.; CAICEDO, C. A.; QUAEDVLIEG, J.; WADT, L. H. de O.; CORVERA, R. |
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Afiliação: |
Evert Thomas, Bioversity International; Jheyson Valdivia, Universidad Nacional Amazonica de Madre de Dios; Carolina Alcázar Caicedo, Bioversity International; Julia Quaedvlieg, Independent consultant; LUCIA HELENA DE OLIVEIRA WADT, CPAF-Rondonia; Ronald Corvera, Instituto de Investigación para la Amazon?a Peruana. |
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Título: |
NTFP harvesters as citizen scientists: Validating traditional and crowdsourced knowledge on seed production of Brazil nut trees in the Peruvian Amazon. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Plos One, v. 12, n. 8, e0183743, August 2017. |
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DOI: |
https://doi.org/10.1371/journal.pone.0183743 |
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Idioma: |
Inglês |
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Conteúdo: |
Understanding the factors that underlie the production of non-timber forest products (NTFPs), as well as regularly monitoring production levels, are key to allow sustainability assessments of NTFP extractive economies. Brazil nut (Bertholletia excelsa, Lecythidaceae) seed harvesting from natural forests is one of the cornerstone NTFP economies in Amazonia. In the Peruvian Amazon it is organized in a concession system. Drawing on seed production estimates of >135,000 individual Brazil nut trees from >400 concessions and ethno-ecological interviews with >80 concession holders, here we aimed to (i) assess the accuracy of seed production estimates by Brazil nut seed harvesters, and (ii) validate their traditional ecological knowledge (TEK) about the variables that influence Brazil nut production. We compared productivity estimates with actual field measurements carried out in the study area and found a positive correlation between them. Furthermore, we compared the relationships between seed production and a number of phenotypic, phytosanitary and environmental variables described in literature with those obtained for the seed production estimates and found high consistency between them, justifying the use of the dataset for validating TEK and innovative hypothesis testing. As expected, nearly all TEK on Brazil nut productivity was corroborated by our data. This is reassuring as Brazil nut concession holders, and NTFP harvesters at large, rely on their knowledge to guide the management of the trees upon which their extractive economies are based. Our findings suggest that productivity estimates of Brazil nut trees and possibly other NTFP-producing species could replace or complement actual measurements, which are very expensive and labour intensive, at least in areas where harvesters have a tradition of collecting NTFPs from the same trees over multiple years or decades. Productivity estimates might even be sourced from harvesters through registers on an annual basis, thus allowing a more cost-efficient and robust monitoring of productivity levels. MenosUnderstanding the factors that underlie the production of non-timber forest products (NTFPs), as well as regularly monitoring production levels, are key to allow sustainability assessments of NTFP extractive economies. Brazil nut (Bertholletia excelsa, Lecythidaceae) seed harvesting from natural forests is one of the cornerstone NTFP economies in Amazonia. In the Peruvian Amazon it is organized in a concession system. Drawing on seed production estimates of >135,000 individual Brazil nut trees from >400 concessions and ethno-ecological interviews with >80 concession holders, here we aimed to (i) assess the accuracy of seed production estimates by Brazil nut seed harvesters, and (ii) validate their traditional ecological knowledge (TEK) about the variables that influence Brazil nut production. We compared productivity estimates with actual field measurements carried out in the study area and found a positive correlation between them. Furthermore, we compared the relationships between seed production and a number of phenotypic, phytosanitary and environmental variables described in literature with those obtained for the seed production estimates and found high consistency between them, justifying the use of the dataset for validating TEK and innovative hypothesis testing. As expected, nearly all TEK on Brazil nut productivity was corroborated by our data. This is reassuring as Brazil nut concession holders, and NTFP harvesters at large, rely on their knowledge to guide the man... Mostrar Tudo |
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Palavras-Chave: |
Brazil nut; Castanha do brasil; Non-timber forest products; PFNM; Produtos florestais não madeireiros. |
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Thesagro: |
Bertholletia Excelsa; Castanha do Para. |
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Thesaurus Nal: |
Brazil nuts. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/227628/1/cpafro-18023.pdf
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Marc: |
LEADER 03022naa a2200289 a 4500
001 2088871
005 2021-11-10
008 2017 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1371/journal.pone.0183743$2DOI
100 1 $aTHOMAS, E.
245 $aNTFP harvesters as citizen scientists$bValidating traditional and crowdsourced knowledge on seed production of Brazil nut trees in the Peruvian Amazon.$h[electronic resource]
260 $c2017
520 $aUnderstanding the factors that underlie the production of non-timber forest products (NTFPs), as well as regularly monitoring production levels, are key to allow sustainability assessments of NTFP extractive economies. Brazil nut (Bertholletia excelsa, Lecythidaceae) seed harvesting from natural forests is one of the cornerstone NTFP economies in Amazonia. In the Peruvian Amazon it is organized in a concession system. Drawing on seed production estimates of >135,000 individual Brazil nut trees from >400 concessions and ethno-ecological interviews with >80 concession holders, here we aimed to (i) assess the accuracy of seed production estimates by Brazil nut seed harvesters, and (ii) validate their traditional ecological knowledge (TEK) about the variables that influence Brazil nut production. We compared productivity estimates with actual field measurements carried out in the study area and found a positive correlation between them. Furthermore, we compared the relationships between seed production and a number of phenotypic, phytosanitary and environmental variables described in literature with those obtained for the seed production estimates and found high consistency between them, justifying the use of the dataset for validating TEK and innovative hypothesis testing. As expected, nearly all TEK on Brazil nut productivity was corroborated by our data. This is reassuring as Brazil nut concession holders, and NTFP harvesters at large, rely on their knowledge to guide the management of the trees upon which their extractive economies are based. Our findings suggest that productivity estimates of Brazil nut trees and possibly other NTFP-producing species could replace or complement actual measurements, which are very expensive and labour intensive, at least in areas where harvesters have a tradition of collecting NTFPs from the same trees over multiple years or decades. Productivity estimates might even be sourced from harvesters through registers on an annual basis, thus allowing a more cost-efficient and robust monitoring of productivity levels.
650 $aBrazil nuts
650 $aBertholletia Excelsa
650 $aCastanha do Para
653 $aBrazil nut
653 $aCastanha do brasil
653 $aNon-timber forest products
653 $aPFNM
653 $aProdutos florestais não madeireiros
700 1 $aVALDIVIA, J.
700 1 $aCAICEDO, C. A.
700 1 $aQUAEDVLIEG, J.
700 1 $aWADT, L. H. de O.
700 1 $aCORVERA, R.
773 $tPlos One$gv. 12, n. 8, e0183743, August 2017.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
27/11/2018 |
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Data da última atualização: |
11/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
WALDNER, F.; SCHUCKNECHT, A.; LESIV, M.; GALLEGO, J.; SEE, L.; PÉREZ-HOYOS, A.; D'ANDRIMONT, R.; DE MAET, T.; LASO BAYAS, J. C.; FRITZ, S.; LEO, O.; KERDILES, H.; DÍEZ, M.; VAN TRICHT, K.; GILLIAMS, S.; SHELESTOV, A.; LAVRENIUK, M.; SIMÕES, M.; FERRAZ, R. P. D.; BELLÓN, B.; BÉGUÉ, A.; HAZEU, G.; STONACEK, V.; KOLOMAZNIK, J.; MISUREC, J.; VERÓN, S. R.; ABELLEYRA, D. de; PLOTNIKOV, D.; MINGYONG, L.; SINGHA, M.; PATIL, P.; ZHANG, M.; DEFOURNY, P. |
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Afiliação: |
FRANÇOIS WALDNER, UNIVERSITÉ CATHOLIQUE DE LOUVAIN, BELGIUM/COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION, AGRICULTURE AND FOOD, AUSTRALIA; ANNE SCHUCKNECHT, EUROPEAN COMMISSION JOINT RESEARCH CENTRE, ISPRA, ITALY/KARLSRUHE INSTITUTE OF TECHNOLOGY, GARMISCH-PARTENKIRCHEN, GERMANY; MYROSLAVA LESIV, INTERNATIONAL INSTITUTE FOR APPLIED SYSTEMS ANALYSIS, LAXENBURG, AUSTRIA; JAVIER GALLEGO, EUROPEAN COMMISSION JOINT RESEARCH CENTRE, ISPRA, ITALY; LINDA SEE, INTERNATIONAL INSTITUTE FOR APPLIED SYSTEMS ANALYSIS, LAXENBURG, AUSTRIA; ANA PÉREZ-HOYOS, EUROPEAN COMMISSION JOINT RESEARCH CENTRE, ISPRA, ITALY; RAPHAËL D'ANDRIMONT, UNIVERSITÉ CATHOLIQUE DE LOUVAIN, BELGIUM/EUROPEAN COMMISSION JOINT RESEARCH CENTRE, ISPRA, ITALY; THOMAS DE MAET, UNIVERSITÉ CATHOLIQUE DE LOUVAIN, EARTH AND LIFE INSTITUTE, LOUVAIN-LA-NEUVE, BELGIUM; JUAN CARLOS LASO BAYAS, INTERNATIONAL INSTITUTE FOR APPLIED SYSTEMS ANALYSIS, LAXENBURG, AUSTRIA; STEFFEN FRITZ, INTERNATIONAL INSTITUTE FOR APPLIED SYSTEMS ANALYSIS, LAXENBURG, AUSTRIA; OLIVIER LEO, EUROPEAN COMMISSION JOINT RESEARCH CENTRE, ISPRA, ITALY; HERVÉ KERDILES, EUROPEAN COMMISSION JOINT RESEARCH CENTRE, ISPRA, ITALY; MÓNICA DÍEZ, DEIMOS IMAGING, BOECILLO, VALLADOLID, SPAIN; KRISTOF VAN TRICHT, VITO REMOTE SENSING, MOL, BELGIUM; SVEN GILLIAMS, VITO REMOTE SENSING, MOL, BELGIUM; ANDRII SHELESTOV, NATIONAL TECHNICAL UNIVERSITY OF UKRAINE IGOR SIKORSKY KYIV POLYTECHNIC INSTITUE, KYIV, UKRAINE; MYKOLA LAVRENIUK, NATIONAL TECHNICAL UNIVERSITY OF UKRAINE IGOR SIKORSKY KYIV POLYTECHNIC INSTITUE, KYIV, UKRAINE; MARGARETH GONCALVES SIMOES, CNPS; RODRIGO PECANHA DEMONTE FERRAZ, CNPS; BEATRIZ BELLÓN, CIRAD, UMR TETIS, MONTPELLIER, FRANCE; AGNÈS BÉGUÉ, CIRAD, UMR TETIS, MONTPELLIER, FRANCE/TETIS, CIRAD, IRSTEA, AGROPARISTECH, CNRS, UNIV MONTPELLIER, MONTPELLIER, FRANCE; GERARD HAZEU, WAGENINGEN ENVIRONMENTAL RESEARCH (ALTERRA), WAGENINGEN, THE NETHERLANDS; VACLAV STONACEK, GISAT S.R.O., PRAGUE, CZECH REPUBLIC; JAN KOLOMAZNIK, GISAT S.R.O., PRAGUE, CZECH REPUBLIC; JAN MISUREC, GISAT S.R.O., PRAGUE, CZECH REPUBLIC; SANTIAGO R. VERÓN, INSTITUTO NACIONAL DE TECNOLOGÍA AGROPECUARIA (INTA), HURLINGHAM, ARGENTINA/UNIVERSIDAD DE BUENOS AIRES AND CONICET, BUENOS AIRES, ARGENTINA; DIEGO DE ABELLEYRA, INSTITUTO NACIONAL DE TECNOLOGÍA AGROPECUARIA (INTA), HURLINGHAM, ARGENTINA; DMITRY PLOTNIKOV, TERRESTRIAL ECOSYSTEMS MONITORING LABORATORY, SPACE RESEARCH INSTITUTE OF RUSSIAN ACADEMY OF SCIENCES (IKI), MOSCOW, RUSSIA; LI MINGYONG, KEY LABORATORY OF DIGITAL EARTH SCIENCE, INSTITUDE OF REMOTE SENSING AND DIGITAL EARTH, CHINESE ACADEMY OF SCIENCES, BEIJING, CHINA; MRINAL SINGHA, KEY LABORATORY OF DIGITAL EARTH SCIENCE, INSTITUDE OF REMOTE SENSING AND DIGITAL EARTH, CHINESE ACADEMY OF SCIENCES, BEIJING, CHINA; PRASHANT PATIL, KEY LABORATORY OF DIGITAL EARTH SCIENCE, INSTITUDE OF REMOTE SENSING AND DIGITAL EARTH, CHINESE ACADEMY OF SCIENCES, BEIJING, CHINA; MIAO ZHANG, KEY LABORATORY OF DIGITAL EARTH SCIENCE, INSTITUDE OF REMOTE SENSING AND DIGITAL EARTH, CHINESE ACADEMY OF SCIENCES, BEIJING, CHINA; PIERRE DEFOURNY, UNIVERSITÉ CATHOLIQUE DE LOUVAIN, EARTH AND LIFE INSTITUTE, LOUVAIN-LA-NEUVE, BELGIUM. |
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Título: |
Conflation of expert and crowd reference data to validate global binary thematic maps. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Remote Sensing of Environment, v. 221, p. 235-246, Feb. 2019. |
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DOI: |
https://doi.org/10.1016/j.rse.2018.10.039 |
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Idioma: |
Inglês |
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Conteúdo: |
With the unprecedented availability of satellite data and the rise of global binary maps, the collection of shared reference data sets should be fostered to allow systematic product benchmarking and validation. Authoritative global reference data are generally collected by experts with regional knowledge through photo-interpretation. During the last decade, crowdsourcing has emerged as an attractive alternative for rapid and relatively cheap data collection, beckoning the increasingly relevant question: can these two data sources be combined to validate thematic maps? In this article, we compared expert and crowd data and assessed their relative agreement for cropland identification, a land cover class often reported as difficult to map. Results indicate that observations from experts and volunteers could be partially conflated provided that several consistency checks are performed. We propose that conflation, i.e., replacement and augmentation of expert observations by crowdsourced observations, should be carried out both at the sampling and data analytics levels. The latter allows to evaluate the reliability of crowdsourced observations and to decide whether they should be conflated or discarded. We demonstrate that the standard deviation of crowdsourced contributions is a simple yet robust indicator of reliability which can effectively inform conflation. Following this criterion, we found that 70% of the expert observations could be crowdsourced with little to no effect on accuracy estimates, allowing a strategic reallocation of the spared expert effort to increase the reliability of the remaining 30% at no additional cost. Finally, we provide a collection of evidence-based recommendations for future hybrid reference data collection campaigns. MenosWith the unprecedented availability of satellite data and the rise of global binary maps, the collection of shared reference data sets should be fostered to allow systematic product benchmarking and validation. Authoritative global reference data are generally collected by experts with regional knowledge through photo-interpretation. During the last decade, crowdsourcing has emerged as an attractive alternative for rapid and relatively cheap data collection, beckoning the increasingly relevant question: can these two data sources be combined to validate thematic maps? In this article, we compared expert and crowd data and assessed their relative agreement for cropland identification, a land cover class often reported as difficult to map. Results indicate that observations from experts and volunteers could be partially conflated provided that several consistency checks are performed. We propose that conflation, i.e., replacement and augmentation of expert observations by crowdsourced observations, should be carried out both at the sampling and data analytics levels. The latter allows to evaluate the reliability of crowdsourced observations and to decide whether they should be conflated or discarded. We demonstrate that the standard deviation of crowdsourced contributions is a simple yet robust indicator of reliability which can effectively inform conflation. Following this criterion, we found that 70% of the expert observations could be crowdsourced with little to no effect o... Mostrar Tudo |
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Palavras-Chave: |
Amostragem sistemática estratificada; Avaliação da precisão; Crowdsourcing; Informação geográfica voluntária; Qualidade dos dados. |
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Thesagro: |
Fotointerpretação. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03404naa a2200589 a 4500
001 2100187
005 2021-11-11
008 2019 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.rse.2018.10.039$2DOI
100 1 $aWALDNER, F.
245 $aConflation of expert and crowd reference data to validate global binary thematic maps.$h[electronic resource]
260 $c2019
520 $aWith the unprecedented availability of satellite data and the rise of global binary maps, the collection of shared reference data sets should be fostered to allow systematic product benchmarking and validation. Authoritative global reference data are generally collected by experts with regional knowledge through photo-interpretation. During the last decade, crowdsourcing has emerged as an attractive alternative for rapid and relatively cheap data collection, beckoning the increasingly relevant question: can these two data sources be combined to validate thematic maps? In this article, we compared expert and crowd data and assessed their relative agreement for cropland identification, a land cover class often reported as difficult to map. Results indicate that observations from experts and volunteers could be partially conflated provided that several consistency checks are performed. We propose that conflation, i.e., replacement and augmentation of expert observations by crowdsourced observations, should be carried out both at the sampling and data analytics levels. The latter allows to evaluate the reliability of crowdsourced observations and to decide whether they should be conflated or discarded. We demonstrate that the standard deviation of crowdsourced contributions is a simple yet robust indicator of reliability which can effectively inform conflation. Following this criterion, we found that 70% of the expert observations could be crowdsourced with little to no effect on accuracy estimates, allowing a strategic reallocation of the spared expert effort to increase the reliability of the remaining 30% at no additional cost. Finally, we provide a collection of evidence-based recommendations for future hybrid reference data collection campaigns.
650 $aFotointerpretação
653 $aAmostragem sistemática estratificada
653 $aAvaliação da precisão
653 $aCrowdsourcing
653 $aInformação geográfica voluntária
653 $aQualidade dos dados
700 1 $aSCHUCKNECHT, A.
700 1 $aLESIV, M.
700 1 $aGALLEGO, J.
700 1 $aSEE, L.
700 1 $aPÉREZ-HOYOS, A.
700 1 $aD'ANDRIMONT, R.
700 1 $aDE MAET, T.
700 1 $aLASO BAYAS, J. C.
700 1 $aFRITZ, S.
700 1 $aLEO, O.
700 1 $aKERDILES, H.
700 1 $aDÍEZ, M.
700 1 $aVAN TRICHT, K.
700 1 $aGILLIAMS, S.
700 1 $aSHELESTOV, A.
700 1 $aLAVRENIUK, M.
700 1 $aSIMÕES, M.
700 1 $aFERRAZ, R. P. D.
700 1 $aBELLÓN, B.
700 1 $aBÉGUÉ, A.
700 1 $aHAZEU, G.
700 1 $aSTONACEK, V.
700 1 $aKOLOMAZNIK, J.
700 1 $aMISUREC, J.
700 1 $aVERÓN, S. R.
700 1 $aABELLEYRA, D. de
700 1 $aPLOTNIKOV, D.
700 1 $aMINGYONG, L.
700 1 $aSINGHA, M.
700 1 $aPATIL, P.
700 1 $aZHANG, M.
700 1 $aDEFOURNY, P.
773 $tRemote Sensing of Environment$gv. 221, p. 235-246, Feb. 2019.
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