Agricultural Ecosystem
Mostrando 13-24 de 59 artigos, teses e dissertações.
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13. High fire temperature changes soil aggregate stability in slash-and-burn agricultural systems
ABSTRACT Fire is a key controlling factor in ecosystem dynamics worldwide, especially, in tropical areas under slash-and-burn agricultural systems. Farmers use fire as a tool to clean the land, and benefit from nutrient enrichment from ash-soil heating. However, fire can cause some detrimental effects on soil systems, such as organic carbon depletion, increa
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-04
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14. Dung Beetles Associated with Agroecosystems of Southern Brazil: Relationship with Soil Properties
ABSTRACT Knowing the biodiversity of dung beetles in agricultural and livestock environments is the basis for understanding the contribution that these organisms make in nutrient cycling and ecosystem functions. The aim of the present study was to investigate the structure of copronecrophagous dung beetle communities inhabiting the main agroecosystems in sou
Rev. Bras. Ciênc. Solo. Publicado em: 27/03/2017
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15. Identifying forest ecosystem regions for agricultural use and conservation
ABSTRACT Balancing agricultural needs with the need to protect biodiverse environments presents a challenge to forestry management. An imbalance in resource production and ecosystem regulation often leads to degradation or deforestation such as when excessive cultivation damages forest biodiversity. Lack of information on geospatial biodiversity may hamper f
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
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16. TIPOLOGÍA Y USOS DEL SUELO EN AGROECOSISTEMAS DEL VALLE DEL GUAMUEZ, PUTUMAYO – COLOMBIA
ABSTRACT The objective of this research was to analyze different agroecosystems located in a region of the Departamento de Putumayo (Colombia) and its sociocultural relationship with productive and land conservation contexts, based on the conceptual and methodological aspects of agroecology. A mixed methods study was carried out, and soil testing methodologi
Soc. nat.. Publicado em: 2015-08
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17. Impact of Amazon land use on the community of soil fungi
Considered as one of the most biodiverse biomes, the Amazon has a featured role in the discovery of new species of plants, animals and microorganisms, which may be important for the functionality of different ecosystems. However, studies on the impacts resulted from changes in the Amazon land use on microbial communities and their functions are still limited
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-04
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18. Caracterização da comunidade de mamíferos de médio e grande porte em paisagem agrícola fragmentada / Characterization of the mid and large bodied mammal community in a fragmented agricultural landscape
Agricultural expansion is a major cause of habitat fragmentation, leading to a reduction and isolation of natural areas. It is therefore important to understand the role of agricultural landscape structure and dynamics in maintaining local biodiversity. We aimed to describe how the structure and dynamics of an agricultural landscape influenced the community
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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19. Cenários futuros para a Amazônia: interações entre o desmatamento, as mudanças climáticas, o ecossistema natural e os sistemas agrícolas / Future scenarios for the Amazon: interactions between deforestation, climate change, natural ecosystem, and agricultural systems
A Floresta Amazônica é um dos mais importantes ecossistemas do mundo, possuindo a maior biodiversidade do planeta. Apesar de toda sua relevância, ela vem sendo submetida a pressões antrópicas nas últimas décadas. A expansão da agricultura e da pecuária tem sido considerada a principal causa do desmatamento na região. Considerando-se a importância
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/04/2012
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20. A estrutura e composição de comunidades microbianas (Bacteria e Archaea) em fragmentos de carvão pirogênico de Terra Preta de Índio da Amazônia Central / Structure and composition of bacterial communities (Bacteria and Archaea) in fragments of pyrogenic charcoal from Amazonian Dark Earth in the Central Amazon
Amazonian Dark Earth (ADE), also known as Terra Preta de Índio, present tropical A horizon, high pH, important nutrients for plant growth, high pyrogenic charcoal levels and intense biological activity when compared to its soil of origin. Soil microbial community is essential for ecosystem function, which is involved in fundamental processes such as the dec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/02/2012
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21. Sustentabilidade de uma propriedade rural de base ecológica : um estudo de caso no Sítio Oliveira em Rio Claro/SP / Sustainability of a farm with ecological production systems: a case study in Sítio Oliveira in Rio Claro/SP
Most of the territorial space of a city is used for agricultural purposes like crops, livestock or forest and a considerable amount of ecological problems are related to such activities, which, as productive processes, are closely linked to the dynamics of ecosystems and certain social relationships of production. In agriculture, sustainability is a guiding
Publicado em: 2011
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22. Metodologias para mapeamento de pastagens degradadas no cerrado.
RESUMO: Desde o início da década de 1970, o Bioma Cerrado vem sendo intensamente ocupado para a produção de carne bovina. Segundo dados do Censo Agropecuário do IBGE de 1995/1996, nesse ecossistema, existem 49,5 milhões de hectares de pastagens cultivadas concentradas nos Estados de Goiás (14.150.900 hectares), Mato Grosso do Sul (11.970.463 hectares)
Planaltina. Publicado em: 2011
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23. Propagação in vitro de Anacardium othonianum rizz., uma espécie frutífera e medicinal do cerrado / In vitro propagation of Anacardium othonianum rizz., a savannah fruiting and medicinal species
Anacardium othonianum Rizz., known as caju de árvore do cerrado, is a fruiting and medicinal species native of the savannah ecosystem, with great economic potential. Since agricultural expansion in the savannah was followed by the reduction of native vegetation, micro propagation has significantly contributed for the propagation of several species, resultin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/03/2010
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24. Serviços ecossistemicos e trajetoria de capitalização agricola : o caso de Machadinho d Oeste-RO / Ecosystem services and agricultural capitalization : the case of Machadinho d Oeste-Rondonia-Brazil
O objetivo deste trabalho é o de traçar a tipologia dos produtores rurais do município de Machadinho d Oeste - RO, oriundos de um projeto de assentamento do Incra, quanto ao seu nível de acumulação de capital, durante o período de 1986 a 2008, no sentido de definir os fatores que levaram aos diferentes níveis de capitalização desses produtores, bem
Publicado em: 2010