Soil Gradients
Mostrando 13-24 de 51 artigos, teses e dissertações.
-
13. A INFLUÊNCIA DE FATORES AMBIENTAIS SOBRE PADRÕES DE DISTRIBUIÇÃO ESPACIAL DE COMUNIDADES DE SERPENTES EM 25 km2 DE FLORESTA DE TERRA FIRME NA AMAZÔNIA CENTRAL
This study determined the influence of environmental factors expressed as gradients on the richness and composition of species of snakes in the Reserva Adolpho Ducke, Manaus, Amazonas, Brazil. We used 46 plots of 250 m in length, 30 uniformly distributed, which follow the altitudinal contours, and 16 riparians, which follow the streams. Each plot was surveye
Publicado em: 2009
-
14. Estrutura, estratificação e grupos ecológicos de um fragmento de floresta estacional semidecidual (Uberaba, MG)
Seasonal semideciduous forests (FES) occur in patches mainly in the region of the Cerrado of central Brazil, had occupied a expressive area throughout Minas Gerais state. These formations generally occur on fertile and humid soil, characterized for the climatic changes that determines the seasonal deciduousness of the dominant tree individuals, in reply the
Publicado em: 2009
-
15. Eficiência do uso de nutrientes ao longo de uma transição de mata de galeria e cerrado no Distrito Federal
In the cerrado landscape, gallery forests occur along the streams and are surrounded by open forms of cerrado vegetation, accompanied by edaphic gradients. Transitions between forest physiognomies and adjacent open cerrado forms involve not only changes in the structure, dynamics, floristic composition of vegetation and species distribution, but also variati
Publicado em: 2008
-
16. Airborne geophysical and geological data applied to the selection of groudwater potential areas in crystalline rocks of Ceara, Brazil / Dados aerogeofisicos e geologicos aplicados a seleção de areas favoraveis para agua subterranea no dominio cristalino do Ceara, Brasil
The location of water well in Northeast Brazil is usually based on the interpretation of structural lineaments in aerial-photographs and electromagnetic and electrical resistivity ground geophysics surveys. However, the success of these techniques is variable, and the small coverage area is another limitation. This Thesis favors a different approach, the use
Publicado em: 2008
-
17. Diversidade beta na floresta ombrófila densa da Amazônia Brasileira
The drivers of the tropical forest beta diversity are still a matter of intense debate. No consensus has been reached; different studies have led to different conclusions. Nonetheless, mapped forest types are frequently used by conservation planners to represent change in floristic composition. The object of this work is to evaluate this practice, and to ver
Publicado em: 2008
-
18. Cerrado sensu stricto sobre Neossolo Quartzarênico : fitogeografia e conservação
The Cerrado biome presents a large spatial heterogeneity and is characterized as having elevated beta diversity. The Sete Cidades National Park (PNSC) and Chapada Grande Meridional, both located at the state of Piauí, show great landscape diversity with different physiognomies and soils types. In this study, we investigated the woody vegetation of the cerra
Publicado em: 2008
-
19. Floristic, phytossociology and edaphic caracters of two deciduous dry forests within Triângulo Mineiro region / Florística, fitossociologia e caracteres edáficos de duas florestas estacionais deciduais no Triângulo Mineiro
Deciduous dry forests are characterized by both seasonal climate and great leaf fall of the arboreus elements. They are distributed throughout tropical regions and within Triângulo Mineiro region they can be found in uphill turned around rivers. Currently, those forests are in a critical conservation status. Deciduous dry forests are the most threatened of
Publicado em: 2007
-
20. FlorÃstica, fitossociologia e caracteres edÃficos de duas florestas estacionais deciduais no TriÃngulo Mineiro / Floristic, phytossociology and edaphic caracters of two deciduous dry forests within TriÃngulo Mineiro region
Deciduous dry forests are characterized by both seasonal climate and great leaf fall of the arboreus elements. They are distributed throughout tropical regions and within TriÃngulo Mineiro region they can be found in uphill turned around rivers. Currently, those forests are in a critical conservation status. Deciduous dry forests are the most threatened of
Publicado em: 2007
-
21. Analise de paredes de contenção atraves de metodo unidimensional evolutivo : Marcelo Tacitano / Earth-retaining structures analysis with the evolutionary one-dimensional method
The retaining structures, usually of wood, steel or concrete, can be constituted by sheet pile wall, piles with lagging, ?in cast? pile walls and diaphragm walls among others and need to be designed, so that they reach the requirements about functionality, execution, safety and economy an appropriate way. It is possible divide the design methods in three gre
Publicado em: 2006
-
22. Comportamento filtro-drenante de geotêxteis em barragens de rejeitos de mineração
The behaviour of tailing dams depends on their filtration and drainage systems. In this context, this dissertation aimed to study the behaviour of geotextiles in such systems. To accomplish that, field and laboratory tests were performed on the main variables related to the filtration mechanism. These tests allowed the characterization of the filtration proc
Publicado em: 2006
-
23. Establishment of riparian forest in disturbed and degraded areas / Estabelecimento de mata ciliar em Ãreas degradada e pertubada
The restoration of riparian forests along the rivers, around the lakes, reservoirs and springs, generates many benefits to the ecosystem, providing with the time, protection to the springs, soil and fauna. The main objective of this study was to evaluate the establishment of mixed planting in the cities of Itutinga and Carrancas, Alto do Rio Grande region, s
Publicado em: 2006
-
24. Balanço de energia e evapotranspiração de cafezal adensado em crescimento sob irrigação localizada. / Energy balance and evapotranspiration in a high density young coffee under located irrigation.
The objectives of this study were to evaluate the magnitude of global evapotranspiration (ETc) in a high density young coffee crop (3.5mx0.9m) under drip irrigation, the ETc partition considering hedgerows and interrows, and the partition of the available radiant energy between sensible and latent heat fluxes. The experiments were conducted from September 20
Publicado em: 2005