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| Registros recuperados: 151 | |
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| WANDELLI, E. V.; SOUSA, S. G. A. de; MATOS, J. C. de S.; PERIN, R.; FERNANDES, E. C. M.; McKERROW, A.. |
| Avaliacao do potencial de contribuicao da conversao da biomassa da vegetacao secundaria em cinzas, pelo metodo de derruba e queima, em Manaus-AM (Brasil). Com base nos resltados, foi verificado que a biomassa da vegetacao secundaria em solos acidos e degradados, quando convertida em cinzas, nao aumenta o status nutricional do solo; o que sugere uso de praticas de manejo da biomassa da capoeira como alternativa para a derruba e queima. Por exemplo, que a biomassa seja utilizada como cobertura morta ou que as capoeiras sejam enriquecidas com especies de valor economico. |
| Tipo: Resumo em anais de congresso (ALICE) |
Palavras-chave: Agrofloresta; Brasil; Amazonas; Manaus; Reclamation; Biomassa; Capoeira; Cobertura do Solo; Desmatamento; Deterioração do Solo; Essência Florestal; Floresta Tropical Úmida; Queimada; Recuperação do Solo; Reflorestamento; Agroforestry; Biomass; Burning; Deforestation; Environmental degradation; Fallow; Forest trees; Reforestation; Tropical rain forests. |
| Ano: 1996 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/669890 |
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| FERNANDES, E.C.M.; NEVES. E.J.M.; MATOS, J.C. de. |
| O uso tradicional de pousio com arvores e arbustos para recuperacao da produtividade do solo, apos varios anos de cultivo, torna-se desejavel, com o proposito de identificar arvores e tipo de manejo que contribuam para o aumento da produtividade da area. O objetivo e' reduzir os tradicionais periodos de pousio, ou ate mesmo elimina-los, por meio da introducao de sistemas nos quais as "melhorias do solo" sejam decorrentes do manejo de arvores juntamente com cultivos agricolas e/ou pastagens (agrofloresta), ou enriquecimento de capoeira natural (capoeira manejada ou melhorada), ou estabelecimento de plantacoes puras de especies florestais. Parte-se da hipotese de que "sistemas apropriados com base em arvores" tem o potencial de controlar a erosao, conservar... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Floresta tropical umida; Desmatamento; Pastagem; Deterioracao do solo; Capoeira; Pousio; Recuperacao do solo; Desenvolvimento sustentavel; Agrofloresta; Reflorestamento; Brasil; Amazonas; Tropical rain forest; Deforestation; Pasture; Environmental degradation; Shrubs; Fallow systems; Reclamation; Soil conservation; Sustainability; Forest trees; Agroforestry. |
| Ano: 1993 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/667157 |
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| SANTOS, E. T. dos; JOSÉ, J. V.; ZOLIN, C. A.; REZENDE, R.; OLIVEIRA, H. do V. de. |
| Resumo: Buscando-se acrescentar informações para mitigar problemas ambientais, como a perda de cobertura vegetal natural pelo uso agrícola, desenvolveu-se, por este trabalho, um estudo sobre a variação da cobertura vegetal entre os anos de 1985 e 2008 na Bacia do Córrego Ipiranga localizada no município de Cidade Gaúcha, Paraná. Utilizando-se técnicas de geoprocessamento e imagens dos satélites CBERS e Landsat, geraram-se mapas temáticos mostrando a alteração ocorrida no período considerado. Comparando os resultados obtidos das classificações das imagens, observou-se que houve uma redução na área de matas e florestas da bacia de 23,3% em 1985 para 13,71% em 2008 e um aumento de áreas com pastagem e agricultura. |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: SIG; Geoprocessamento; Landsat; Vegetation cover; Agriculture; Environmental impact; Deforestation; Geographic information systems. |
| Ano: 2011 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/907255 |
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| van Benthem, Arthur A.; Kerr, Suzi. |
| Voluntary opt-in programs to reduce emissions in unregulated sectors or countries have spurred considerable discussion. Since any regulator will make errors in predicting baselines and participants will self-select into the program, adverse selection will reduce efficiency and possibly environmental integrity. In contrast, pure subsidies lead to full participation but require large financial transfers. We present a simple model to analyze this trade-off between adverse selection and infra-marginal transfers. We find that increasing the scale of voluntary programs both improves efficiency and reduces transfers. We show that discounting (paying less than full value for offsets) is inefficient and cannot be used to reduce the fraction of offsets that are... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy; Deforestation; Offsets; Adverse selection; REDD; Climate change policy; Opt-in.. |
| Ano: 2011 |
URL: http://purl.umn.edu/100569 |
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| LATAWIEC, A. E.; STRASSBURG, B. B. N.; JUNQUEIRA, A. B.; ARAUJO, E. da S.; MORAES, L. F. D. de; PINTO, H. A. N.; CASTRO, A.; RANGEL, M.; MALAGUTI, G. A.; RODRIGUES, A. F.; BARIONI, L. G.; NOVOTNY, E. H.; CORNELISSEN, G.; MENDES, M.; BATISTA, N.; GUERRA, J. G. M.; ZONTA, E.; JAKOVAC, C.; HALE, S. E.. |
| Most deforested lands in Brazil are occupied by low-productivity cattle ranching. Brazil is the second biggest meat producer worldwide and is projected to increase its agricultural output more than any other country. Biochar has been shown to improve soil properties and agricultural productivity when added to degraded soils, but these effects are context-dependent. The impact of biochar, fertilizer and inoculant on the productivity of forage grasses in Brazil (Brachiaria spp. and Panicum spp.) was investigated from environmental and socio-economic perspectives. We showed a 27% average increase in Brachiaria production over two years but no significant effects of amendment on Panicum yield. Biochar addition also increased the contents of macronutrients,... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Biocarvão; Degradação de pastagem; Pastureland; Agricultura Sustentável; Brachiaria Brizantha; Desmatamento; Forragem; Panicum Maximum; Pastagem; Biochar; Deforestation; Ecosystem services; Emissions; Gases; Soil; Yields. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113523 |
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| Yackulic, Charles B; Department of Ecology, Evolution and Environmental Biology, Columbia University ; c_yackulic@yahoo.com; Fagan, Matthew ; Department of Ecology, Evolution and Environmental Biology, Columbia University; mef2153@columbia.edu; Jain, Meha; Department of Ecology, Evolution and Environmental Biology, Columbia University; mj2415@columbia.edu; Jina, Amir; Sustainability Program, Columbia University; amirjina@gmail.com; Lim, Yili; Department of Ecology, Evolution and Environmental Biology, Columbia University ; yilime@gmail.com; Marlier, Miriam; Department of Earth and Environmental Sciences, Columbia University; miriammarlier@gmail.com; Muscarella, Robert; Department of Ecology, Evolution and Environmental Biology, Columbia University; rm2824@columbia.edu; Adame, Patricia; Forest Research Centre (CIFOR-INIA), Madrid, Spain ; adame.patricia@inia.es; DeFries, Ruth; Department of Ecology, Evolution and Environmental Biology, Columbia University; rd2402@columbia.edu; Uriarte, Maria; Department of Ecology, Evolution and Environmental Biology, Columbia University; mu2126@columbia.edu. |
| Forest transitions (FT) occur when socioeconomic development leads to a shift from net deforestation to reforestation; these dynamics have been observed in multiple countries across the globe, including the island of Puerto Rico in the Caribbean. Starting in the 1950s, Puerto Rico transitioned from an agrarian to a manufacturing and service economy reliant on food imports, leading to extensive reforestation. In recent years, however, net reforestation has leveled off. Here we examine the drivers of forest transition in Puerto Rico from 1977 to 2000 at two subnational, nested spatial scales (municipality and barrio) and over two time periods (1977-1991 and 1991-2000). This study builds on previous work by considering the social and biophysical factors that... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Agricultural abandonment; Deforestation; Forest transition; Puerto Rico; Reforestation. |
| Ano: 2011 |
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| Caviglia-Harris, Jill L.. |
| In developing countries across the globe the impact of livestock on deforestation levels has been profound. This paper explores the role of the cattle industry in household decision making for small landholders in the Brazilian Amazon. Important inquiries raised in the literature are addressed, including the determinants of the co-evolution of deforestation and cattle herds, the possibility of production specialization, and the role of cattle in household livelihoods. Panel data suggest that households have changed focus from crop introduction to cattle. Empirical models reveal that location, wealth, and education are among the important determinants of production decisions and cattle accumulation. Policy recommendations include a focus on the cattle... |
| Tipo: Journal Article |
Palavras-chave: Latin America; Brazil; Household production; Land use; Cattle; Deforestation; Land Economics/Use; Livestock Production/Industries. |
| Ano: 2005 |
URL: http://purl.umn.edu/10233 |
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| Acerbi Júnior,Fausto Weimar; Silveira,Eduarda Martiniano de Oliveira; Mello,José Márcio de; Mello,Carlos Rogério de; Scolforo,José Roberto Soares. |
| The Normalized Difference Vegetation Index (NDVI) is often used to extract information from vegetated areas since it is directly related to vegetation parameters such as percent of ground cover, photosynthetic activity of the plant and leaf area index. The aim of this paper was to analyze the potencial of semivariograms generated from NDVI values to detect changes in vegetated areas, analyzing their behavior (shape) and derived metrics (range, sill and nugget). Semivariograms were generated from NDVI values derived from Landsat TM images of May 2010, June 2010 and July 2011. The study area is located in the northern state of Minas Gerais, Brazil, and is covered by Brazilian savannas vegetation, totalizing 1,596 ha. Semivariograms were generated after the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deforestation; Geostatistics; Remote sensing. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000200103 |
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| Bradley, Andrew V; Centre for Ecology and Hydrology, Monks Wood, Abbots Ripton, Cambridgeshire, PE28 2LS, UK; avbradley@ceh.ac.uk; Millington, Andrew C; Department of Geography, 810 O&M Building, Texas A&M University, College Station, Texas 77843-3147, USA; millington@geog.tamu.edu. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Anti-narcotics policies; Bolivia; Coca; Deforestation; Forest clearance rates; Land-use change. |
| Ano: 2008 |
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| COELHO, A. G. DE A.; ANTUNES, P. C.; OLIVEIRA-SANTOS, L. G. R.; TOMAS, W. M.; BORDIGNON, M. O.. |
| O Pantanal possui uma grande diversidade de habitats, compondo uma paisagem complexa que tem sido conservada pela pecuária tradicional. Mais recentemente, a implantação de pastagem cultivada, visando ao aumento da produtividade e intensificando o sistema de produção vem alterando a paisagem pantaneira. Os resultados dessa alteração é a simplificação da composição e da complexidade da paisagem, colocando em risco a biodiversidade regional. O objetivo deste estudo foi avaliar alterações na comunidade de pequenos mamíferos em diferentes fitofisionomias, inclusive área alterada, em duas Fazendas no Pantanal da Nhecolândia. The Pantanal presents a great habitat diversity composing a complex landscape which has been conserved by the traditional cattle ranching.... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Bracchiaria; Desmatamento; Extinção; Marsupiais; Pecuária; Roedores; Cattle ranching; Deforestation; Extinction; Marsupials; Rodents. |
| Ano: 2010 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/868294 |
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| Registros recuperados: 151 | |
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