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Registros recuperados : 42 | |
26. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LU, D.; BATISTELLA, M.; ALVES, D. HETRICK, S.; MORAN, E. Mapping of Fractional Forest Cover in Rondonia, Brazil with a Combination of Terra MODIS and Landsat TM Images. In: LBA_ECO Science Team Meeting, 11., 2007, Salvador. Resumos... Salvador: LBA, 2007. p. 31-32. Biblioteca(s): Embrapa Territorial. |
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31. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | BATISTELLA, M.; ALVES, D.; LU, D.; MORAN, E. F.; BRONDIZIO, E. S.; D'ANTONA, A. From the Landscape to the region: scaling up approaches in human and physical dimensions of land-use and land-cover change in the Amazon. In: LBA-ECO SCIENCE TEAM MEETING, 10., 2006. Brasília, DF. Abstracts... Brasília: LBA-ECO, 2006. 1 p. Biblioteca(s): Embrapa Territorial. |
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32. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LI, G.; LU, D.; MORAN, E.; CALVI, M. F.; DUTRA, L. V.; BATISTELLA, M. Examining deforestation and agropasture dynamics along the Brazilian TransAmazon Highway using multitemporal Landsat imagery. GIScience & Remote Sensing, v. 56, n. 2, p. 161-183, 2019. Biblioteca(s): Embrapa Agricultura Digital. |
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33. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LU, D.; BATISTELLA, M.; MORAN, E. F.; MIRANDA, E. E. D. A comparative study of Terra ASTER, Landsat TM, and SPT HRG data for land cover classification in the Brazilian Amazon. In: WORLD MULTI-CONFERENCE ON SYSTEMICS, CYBERNETICS AND INFORMATICS (WMSCI2005), 9th, 2005, Orlando - Florida. Proceedings... Orlando: International Institute of Informatics and Systemics (IIS), 2005. v. 8, p. 411-416. folhas avulsas Biblioteca(s): Embrapa Territorial. |
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34. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LU, D.; BATISTELLA, M.; MORAN, E.; HETRICK, S.; ALVES, D.; BRONDIZIO, E. Fractional forest cover mapping in the Brazilian Amazon with a combination of MODIS and TM images. International Journal of Remote Sensing, v. 32, n. 22, p. 7131-7149, 2011. Biblioteca(s): Embrapa Territorial. |
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36. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | CAK, A. D.; MORAN, E. F.; FIGUEIREDO, R. de O.; LU, D.; LI, G.; HETRICK, S. Urbanization and small household agricultural land use choices in the Brazilian Amazon and the role for the water chemistry of small streams. Journal of Land Use Science, Abingdon, v. 11, n. 2, p. 203-221, 2016. Biblioteca(s): Embrapa Meio Ambiente. |
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37. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LU, D.; CHEN, Q.; WANG, G.; MORAN, E.; BATISTELLA, M.; ZHANG, M.; LAURIN, G. V.; SAAH, D. Aboveground forest biomass estimation with Landsat and LiDAR data and uncertainty analysis of the estimates. International Journal of Forestry Research, v. 2012. p. 16, 2012 16 p. Biblioteca(s): Embrapa Territorial. |
| ![Visualizar detalhes do registro](/consulta/web/img/visualizar.png) ![Acesso ao objeto digital](/consulta/web/img/pdf.png) ![Imprime registro no formato completo](/consulta/web/img/print.png) |
38. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LU, D.; BATISTELLA, M.; LI, G.; MORAN, E.; HETRICK, S.; FREITAS, C. DA C.; SANT'ANNA, S. J. Land use/cover classification in the Brazilian Amazon using satellite images. Pesquisa Agropecuária Brasileira, Brasilia, DF, v. 47, n. 9, p. 1185-1208, set. 2012. p. 1185-1208. Biblioteca(s): Embrapa Territorial; Embrapa Unidades Centrais. |
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39. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | FENG, Y.; LU, D.; CHEN, Q.; KELLER, M.; MORAN, E.; SANTOS, M. N. dos S.; BOLFE, E. L.; BATISTELLA, M. Examining effective use of data source and modeling algorithms for improving biomass estimation in a moist tropical forest of the brazilian Amazon. International Journal of Digital Earth, London, 2017. Biblioteca(s): Embrapa Unidades Centrais. |
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40. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | CHEN, Q.; LU, D.; KELLER, M.; SANTOS, M. N. DOS; BOLFE, E. L.; FENG, Y.; WANG, C. Modeling and Mapping Agroforestry Aboveground Biomass in the Brazilian Amazon Using Airborne Lidar Data. Remote Sensing, v. 8, n. 1, p. 1-17, 2015. Biblioteca(s): Embrapa Territorial. |
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Registros recuperados : 42 | |
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Registro Completo
Biblioteca(s): |
Embrapa Territorial. |
Data corrente: |
31/05/2016 |
Data da última atualização: |
31/05/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
CHEN, Q.; LU, D.; KELLER, M.; SANTOS, M. N. DOS; BOLFE, E. L.; FENG, Y.; WANG, C. |
Afiliação: |
QI CHEN, Zhejiang A&F University; DENGSHENG LU, Michigan State University; MICHAEL KELLER, USDA Forest Service/ Pesquisador Visitante CNPM; MAIZA NARA DOS SANTOS, BOLSISTA CNPM; EDSON LUIS BOLFE, CNPM; YUNYUN FENG, Zhejiang A&F University; CHANGWEI WANG, University of Hawaii at Manoa. |
Título: |
Modeling and Mapping Agroforestry Aboveground Biomass in the Brazilian Amazon Using Airborne Lidar Data. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Remote Sensing, v. 8, n. 1, p. 1-17, 2015. |
DOI: |
10.3390/rs8010021 |
Idioma: |
Português |
Conteúdo: |
Agroforestry has large potential for carbon (C) sequestration while providing many economical, social, and ecological benefits via its diversified products. Airborne lidar is considered as the most accurate technology for mapping aboveground biomass (AGB) over landscape levels. However, little research in the past has been done to study AGB of agroforestry systems using airborne lidar data. Focusing on an agroforestry system in the Brazilian Amazon, this study first predicted plot-level AGB using fixed-effects regression models that assumed the regression coefficients to be constants. The model prediction errors were then analyzed from the perspectives of tree DBH (diameter at breast height)?height relationships and plot-level wood density, which suggested the need for stratifying agroforestry fields to improve plot-level AGB modeling. We separated teak plantations from other agroforestry types and predicted AGB using mixed-effects models that can incorporate the variation of AGB-height relationship across agroforestry types. We found that, at the plot scale, mixed-effects models led to better model prediction performance (based on leave-one-out cross-validation) than the fixed-effects models, with the coefficient of determination (R2) increasing from 0.38 to 0.64. At the landscape level, the difference between AGB densities from the two types of models was ~10% on average and up to ~30% at the pixel level. This study suggested the importance of stratification based on tree AGB allometry and the utility of mixed-effects models in modeling and mapping AGB of agroforestry systems. MenosAgroforestry has large potential for carbon (C) sequestration while providing many economical, social, and ecological benefits via its diversified products. Airborne lidar is considered as the most accurate technology for mapping aboveground biomass (AGB) over landscape levels. However, little research in the past has been done to study AGB of agroforestry systems using airborne lidar data. Focusing on an agroforestry system in the Brazilian Amazon, this study first predicted plot-level AGB using fixed-effects regression models that assumed the regression coefficients to be constants. The model prediction errors were then analyzed from the perspectives of tree DBH (diameter at breast height)?height relationships and plot-level wood density, which suggested the need for stratifying agroforestry fields to improve plot-level AGB modeling. We separated teak plantations from other agroforestry types and predicted AGB using mixed-effects models that can incorporate the variation of AGB-height relationship across agroforestry types. We found that, at the plot scale, mixed-effects models led to better model prediction performance (based on leave-one-out cross-validation) than the fixed-effects models, with the coefficient of determination (R2) increasing from 0.38 to 0.64. At the landscape level, the difference between AGB densities from the two types of models was ~10% on average and up to ~30% at the pixel level. This study suggested the importance of stratification based on tree ... Mostrar Tudo |
Palavras-Chave: |
Mixed-effects models. |
Thesaurus NAL: |
Aboveground biomass; Agroforestry; Allometry; Lidar; Wood density. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/143557/1/4726.pdf
|
Marc: |
LEADER 02351naa a2200277 a 4500 001 2045916 005 2016-05-31 008 2015 bl uuuu u00u1 u #d 024 7 $a10.3390/rs8010021$2DOI 100 1 $aCHEN, Q. 245 $aModeling and Mapping Agroforestry Aboveground Biomass in the Brazilian Amazon Using Airborne Lidar Data. 260 $c2015 520 $aAgroforestry has large potential for carbon (C) sequestration while providing many economical, social, and ecological benefits via its diversified products. Airborne lidar is considered as the most accurate technology for mapping aboveground biomass (AGB) over landscape levels. However, little research in the past has been done to study AGB of agroforestry systems using airborne lidar data. Focusing on an agroforestry system in the Brazilian Amazon, this study first predicted plot-level AGB using fixed-effects regression models that assumed the regression coefficients to be constants. The model prediction errors were then analyzed from the perspectives of tree DBH (diameter at breast height)?height relationships and plot-level wood density, which suggested the need for stratifying agroforestry fields to improve plot-level AGB modeling. We separated teak plantations from other agroforestry types and predicted AGB using mixed-effects models that can incorporate the variation of AGB-height relationship across agroforestry types. We found that, at the plot scale, mixed-effects models led to better model prediction performance (based on leave-one-out cross-validation) than the fixed-effects models, with the coefficient of determination (R2) increasing from 0.38 to 0.64. At the landscape level, the difference between AGB densities from the two types of models was ~10% on average and up to ~30% at the pixel level. This study suggested the importance of stratification based on tree AGB allometry and the utility of mixed-effects models in modeling and mapping AGB of agroforestry systems. 650 $aAboveground biomass 650 $aAgroforestry 650 $aAllometry 650 $aLidar 650 $aWood density 653 $aMixed-effects models 700 1 $aLU, D. 700 1 $aKELLER, M. 700 1 $aSANTOS, M. N. DOS 700 1 $aBOLFE, E. L. 700 1 $aFENG, Y. 700 1 $aWANG, C. 773 $tRemote Sensing$gv. 8, n. 1, p. 1-17, 2015.
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