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| Registros recuperados: 163 | |
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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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| MATTOS, C.; MIRANDA, E. E. de; PESSOA, M. C. P. Y.; FILLARDI, A. L.. |
| Machadinho is a Colonization Project created by the National Institute of Colonization and Agrary Reform (INCRA) in 1982 as part of the POLONOROESTE Project, financed by the World Bank. It is located in Rondonia State (western region of Brazilian Amazonia) and has a population of approximately 32,000 habitants living in an area of 209,000 ha divided in 2,934 plots of land for farming, 17 Florest Reserves, 15 urban areas and one airport. The 1986 and 1989 EMBRAPA's study showed that: 1) the agriculture's practice is totally manual; 2) settlers use the strategy of great multiplicity of small investments (animal or vegetal production) to avoid losses; 3) the use of modern technology is limited; 4) productivity is low; 5) life condition is of almost complete... |
| Tipo: Resumo em anais de congresso (ALICE) |
Palavras-chave: Machadinho project; Rondônia; Disease; Agriculture; Deforestation; Farmers; Poverty. |
| Ano: 1990 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/12173 |
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| FIGUEIREDO, R. de O.; CAK, A.; MARKEWITZ, D.. |
| Abstract: Expansion of agriculture in the Brazilian Amazon has been driven not just by demands from traditional, rural producers, but also large agriculture and cattle producers, both of whom have put considerable pressure on remaining forests and their watersheds. Monitoring of these watersheds has been a focus of intensive study for the past 20 years and although this work has greatly increased our understanding, considerable gaps still remain in our ability to provide adequate recommendations for land management and associated public policies. In this study we present a summary of findings from these previous results. For small properties, the use of fire to prepare land for cultivation remains controversial, while in large properties, forest conversion... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Uso da Terra; Recurso Hídrico; Floresta Tropical Úmida; Desmatamento; Biogeochemistry; Deforestation; Land management; Land use change; Public policy; Water resources; Watersheds. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1123149 |
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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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| VENDRUSCULO, L. G.; CASTAGNA, D.; ZOLIN, C. A.; COSTA, C. A. da; RODRIGUES, R. de A. R.. |
| Resumo - O objetivo deste trabalho foi aplicar a metodologia Hectares Indicator visando à estimativa do desmatamento evitado em 20 municípios dos estados do Pará e Mato Grosso, dentro do bioma Amazônia considerando os anos de 2016 e 2017 como períodos base. O desmatamento evitado, segundo esta metodologia desenvolvida por cientistas ingleses, é a diferença entre a perda florestal estimada e a perda florestal observada. A perda estimada baseia-se em fatores (acessibilidade, aptidão agrícola, recursos florestais e minerais extraíveis e áreas protegidas) importantes para potenciais ações de supressão ou degradação florestal. Este estudo foi realizado dentro das atividades do projeto Rural Sustentável. Foram observados municípios com valores de supressão... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Metodologia Hectares Indicator; Perda florestal; Ganho florestal; Sensoriamento Remoto; Desmatamento; Econometria; Amazonia; Remote sensing; Deforestation. |
| Ano: 2019 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117042 |
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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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| ELLWANGER,JOEL HENRIQUE; KULMANN-LEAL,BRUNA; KAMINSKI,VALÉRIA L.; VALVERDE-VILLEGAS,JACQUELINE MARÍA; VEIGA,ANA BEATRIZ G. DA; SPILKI,FERNANDO R.; FEARNSIDE,PHILIP M.; CAESAR,LÍLIAN; GIATTI,LEANDRO LUIZ; WALLAU,GABRIEL L.; ALMEIDA,SABRINA E.M.; BORBA,MAURO R.; HORA,VANUSA P. DA; CHIES,JOSÉ ARTUR B.. |
| Abstract Amazonian biodiversity is increasingly threatened due to the weakening of policies for combating deforestation, especially in Brazil. Loss of animal and plant species, many not yet known to science, is just one among many negative consequences of Amazon deforestation. Deforestation affects indigenous communities, riverside as well as urban populations, and even planetary health. Amazonia has a prominent role in regulating the Earth’s climate, with forest loss contributing to rising regional and global temperatures and intensification of extreme weather events. These climatic conditions are important drivers of emerging infectious diseases, and activities associated with deforestation contribute to the spread of disease vectors. This review... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon rainforest; Biodiversity; Emerging infectious disease; Deforestation; Pathogens; Public health. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100724 |
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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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| DOURADO,EDUARDA D.R.; FERREIRA-KEPPLER,RUTH L.; MARTINS,RENATO T.; RONDEROS,MARIA M.. |
| ABSTRACT We assessed the immature stages of Ceratopogonidae (Diptera) in artificial containers in an urban forest fragment in Manaus (Brazil), including their behavioral, biological and ecological information. In addition, we evaluated the effects of deforestation in an open and forested area on Ceratopogonidae communities. Immatures were sampled between August 2012 and July 2014 in artificial containers installed in both habitat types. We collected 685 immatures of seven morpho-species of Bezzia Kieffer, Culicoides Latreille, Dasyhelea Kieffer, Forcipomyia Meigen, and Palpomyia Meigen. In the open area, we recorded higher temperature and electrical conductivity values than in the forested area; however, these variables did not differ between seasons.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonia; Aquatic insects; Artificial containers; Deforestation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602757 |
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| MALINGREAU, J. P.; H. D. EVA; MIRANDA, E. E. de. |
| Brazilian officials have recently announced that, after a five year lull, deforestation rates are again on the rise in the Legal Amazon (INPE 2011). While this may come as no surprise to some, it is still useful to examine the conditions which have led to the unexpected success by the authorities in reducing deforestation over the previous 5 years. The more so in that these years were characterized by rising agricultural commodity prices, usually a key driver in deforestation dynamics. We argue here that, despite the strong efforts by national and regional authorities to control deforestation processes a reversal of the trend was bound to occur as new policies were set into motion during the relatively quiet deforestation period to accommodate the economic... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Legal Amazon; Deforestation. |
| Ano: 2012 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1123998 |
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| Registros recuperados: 163 | |
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