Vegetation Gradients
Mostrando 13-24 de 29 artigos, teses e dissertações.
-
13. Análise de gradientes vegetacionais e pedogeomorfológicos em Floresta, Cerrado e Campo no Pantanal Matogrossense, Barão de Melgaço, Mato Grosso / Analysis of vegetation and pedogeomorphological gradients in Forest, Cerrado and Grassland in Pantanal Matogrossense, Barão de Melgaço, Mato Grosso
O presente estudo foi dividido em dois capítulos. No primeiro capítulo objetivouse estudar as diferentes fitofisionomias arbóreas distribuídas em diferentes segmentos da paisagem ao longo de gradientes ambientais (inundação, pedológico e geomorfológico) da planície pantaneira, verificando as mudanças florísticas e estruturais nas comunidades de pl
Publicado em: 2009
-
14. Elevational gradient on the arboreal flora on Moutain Cuscuzeiro, Ubatuba (SP) : a phytogeographic, phytosociologic and floristic analysis / A vegetação arborea em um gradiente altitudinal no Morro Cuscuzeiro, Ubatuba (SP) : uma analise floristica, fitossociologica e fitogeografica
The classification and delimitation of different vegetational formations into a phytogeographic system in Brazil has been a challenge to ecologists, botanists, and phytogeographers. The current distribution of these formations is related to historical process of land use and complex environment gradients, occurring in horizontal (latitude, longitude and edaf
Publicado em: 2009
-
15. 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
-
16. Factors structuring fish assemblages in three distinct zones (river, mixture and coastal) of the rio Mambucaba estuary, Angra dos Reis-RJ. / Fatores estruturadores das assembléias de peixes em três distintas zonas (rio, mistura e costeira) do estuário do rio Mambucaba, Angra dos Reis- RJ.
The estuarine systems influence fish assemblages, throughout their longitudinal gradients and remarkable salinity changes. Such assemblages adapt to different habitat constraints and change in spatial and temporal scales. The aim of this study was to assess the ichthyofauna composition and structure in three zones of the Mambucaba estuary (CZ coastal zone; M
Publicado em: 2009
-
17. 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
-
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. 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
-
20. 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
-
21. Utilização de microhabitat por três espécies de roedores cricetídeos em um Cerrado do Brasil Central
The aim ofthe present study was to investigate the utilization of microhabitat by Calomystener,Necromys lasiurus andThalpomys lasiotis,andthe factorsthat affect the abundance of these cricetid species in open areas of fields with murundus, a kind of vegetation of the Central Brazil Cerrado. The study was conducted in a conservation area (Estação Ecológica
Publicado em: 2007
-
22. 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
-
23. 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
-
24. Estudo da taxocenose de crisopÃdeos (Neuroptera: Chrysopidae) em ecossistemas naturais e agropastoris / Taxocenosis of green lacewings (Neuroptera: Chrysopidae) in natural and agricultural ecosystems
This research was carried ou to a) verify the community structure of these predators in forest fragments, open sites and agroecosystems; b) analyze the influence of the size and complexity of forest fragments on the richness and abundance of species; c) study the interaction on communities in forest areas, forest edges and adjacent agroecosystems; d) study t
Publicado em: 2006