Burnt Areas
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Fire records in tree rings of Moquiniastrum polymorphum: potential for reconstructing fire history in the Brazilian Atlantic Forest
ABSTRACT Fire disturbance affects the composition, structure and dynamics of vegetation. Historical records of fire events exist in some places, but they are generally limited in temporal and spatial extent. Tree-ring research is a useful tool for fire history reconstruction and can contribute important long-term ecological data. We tested the hypotheses tha
Acta Bot. Bras.. Publicado em: 29/11/2018
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2. Soil aggregation and carbon stabilization in burn and no-burn sugarcane management systems
ABSTRACT Retaining sugarcane straw over the soil after harvesting can improve soil structure and increase soil carbon stabilization, mainly in macroaggregates. We evaluated the carbon content in the aggregate classes in areas under burn and no-burn (adopted for five years) sugarcane management systems, focusing on the superficial layer (0.00-0.20 m). The exp
An. Acad. Bras. Ciênc.. Publicado em: 25/06/2018
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3. Temporal and Spatial Uncertainty of Erosion Soil Loss from an Argisol Under Sugarcane Management Scenarios
ABSTRACT The identification of erosion-susceptible areas is fundamental for the adoption of soil conservation practices. Thus, the best way to estimate the spatial pattern of soil erosion must be identified, in which the process uncertainties are also taken into consideration. The purpose of this study was to evaluate the spatial and temporal uncertainty of
Rev. Bras. Ciênc. Solo. Publicado em: 29/03/2018
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4. Post-fire regeneration in seasonally dry tropical forest fragments in southeastern Brazil
ABSTRACT Seasonally dry tropical forest is one of the highly threatened biome. However, studies on the effect of fire on these tree communities are still scarce. In this context, a floristic and structural survey in three forest areas in the southeast of Brazil that were affected by fire between 14 and 25 years ago was performed with the objective of evaluat
An. Acad. Bras. Ciênc.. Publicado em: 11/12/2017
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5. Sugarcane straw and the populations of pests and nematodes
The green cane harvesting represented a significant change in sugarcane ecosystem due to the presence of straw left on the soil and to the absence of fire. These two factors may affect the populations of pests and their natural enemies. Among the pests benefit from the green cane harvesting stand out the spittlebug, Mahanarva fimbriolata, the curculionid Sph
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-10
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6. Profile of micronucleus frequencies and nuclear abnormalities in different species of electric fishes (Gymnotiformes) from the Eastern Amazon
The frequency of spontaneous micronucleus (MN) formation in fish species needs to be determined to evaluate their usefulness for genotoxic biomonitoring. The definition of a good bioindicator takes into account the current knowledge of its metabolic traits as well as other factors including its feeding behavior and relationship to the environment. In this st
Genet. Mol. Biol.. Publicado em: 16/08/2013
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7. Fósforo em cronossequência de cana-de-açúcar queimada no cerrado goiano: análise de ácidos húmicos por RMN de 31P
The aim of this study was to identify, with the use of 31P NMR spectroscopy, organic P species in humic acids (HA) in samples from Oxisol cultivated in chronosequence with sugar cane, pasture and Cerrado. The main forms of P-type found were orthophosphate, monoester-P (phosphate sugars) and P-diester (orthophosphate). The 31P NMR technique proved capable of
Quím. Nova. Publicado em: 2013
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8. Comunidade bacteriana, atributos do solo e fluxo de gases em solo sob Cerrado e cana-de-açúcar / Bacterial community, soil properties and gas fluxes in a soil under Cerrado and sugarcane
The sugarcane crop plays an important role on Brazilian economy, and is passing through an expansion process concentrated mainly on the Cerrado (savannah) biome (Middle West region of Brazil). In order to understand the influence of sugarcane cultivation and management on soil chemical, physical and biological properties, we studied two sugarcane areas, with
Publicado em: 2010
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9. Efeitos das emissões geradas pela queima dos canaviais sobre a superfície ocular / Effects of sugar cane burning emissions on the ocular surface
The adverse effects of particle emissions produced by sugar cane burning represent a problem that affects mostly developing countries. Previous studies have shown that, during the burning period, there is an increase in respiratory hospital admissions and emergency room visits in communities surrounded by sugar cane plantations in rural cities of Brazil. How
Publicado em: 2010
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10. Efeito do manejo de fogo sobre comunidades de aves em campos sujos no Parque Nacional das Emas, GO/MS, Cerrado Central / Effects of fire management on birds in Emas National Park, Brazil, Central Cerrado
Several studies have investigated the effects of natural fires on Cerrado birds. However, avian responses to fire management have not been examined. We compared birds found in firebreaks (fire managed areas) and in fire unmanaged grasslands, in Parque Nacional das Emas, Central Brazil. This is the first study to evaluate the effects of prescribed fire on the
Publicado em: 2009
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11. ENVIRONMENTAL ZONING IN HYDROGRAPHIC BASINS CASE STUDY: ENVIRONMENT ZONING OF HYDROGRAPHIC BASIN IN IBICUI MIRIM RIVER UNTIL THE SATURNINO DE BRITO DAM / ZONEAMENTO AMBIENTAL EM BACIAS HIDROGRÁFICAS ESTUDO DE CASO: ZONEAMENTO AMBIENTAL DA MICROBACIA HIDROGRÁFICA DAS NASCENTES DO RIO IBICUI MIRIM ATÉ A BARRAGEM SATURNINO DE BRITO
The Environment Zoning is a legal instrument of ordinance of the use and occupation of the ground. The main goal of this work is classify the allowed, not allowed, conflicting territory in use zones, activities, in accordance with the capacity of support of ecosystems and the economic interest. The Environment Zoning of the Hydrographic Basin of the Ibicuí-
Publicado em: 2008
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12. Aspectos da estrutura fitossociológica e silvigenética em fragmentos de floresta estacional semidecídua com diferentes histórias de perturbação em Botucatu, SP / Aspects of the phytossociological and silvigenetic structure of seasonal semi deciduous forest fragments with different disturbance histories, at Botucatu, SP
The seasonal semi deciduous forest fragments in São Paulo State suffered the fragmentation process mainly because agricultural and urban expansion. These remnants are very important for taxonomic and ecological studies, although they are much altered. By joining phytossociological and silvigenetic studies is possible a diagnosis of their present situation,
Publicado em: 2008