Composição, estrutura e aspectos ecológicos da mata ciliar do Rio Araguari no Triângulo Mineiro / Composition, structure and ecological aspects of forest riparian the Araguari River within Triângulo Mineiro region
AUTOR(ES)
Victor Hugo Paula Rodrigues
DATA DE PUBLICAÇÃO
2007
RESUMO
The study aimed to characterize the tree-shrub community of a riparian forest, one of the last remnatns on the Araguari River, at Uberlândia, Triângulo Mineiro region, Minas Gerais State. The composition, horizontal and vertical structure were investigated by phytosociological survey of 110 plots of 10m x 10m (1,1ha). All trees with CAP ` 15 cm were registered. There were sampled 1.393 trees distributed in 89 species and 36 families. Hirtella gracilipes (Hook.f.) Prance was the most abundant specie, with the highest frequency, density and VI. It is a small tree specie, predominant in the understory of the forest. The Shannon index was H = 3,65 nats.ind-1. The most common soil in the study area was classified as Litholic Neosol dystrophic, with gneiss rock outcrops, and in some parts of the forest there were soils of the Haplic Cambisol Tb dystrophic type. The floristic comparisons indicated the riparian forest of Araguari river is more similar to the Triângulo Mineiro forests, to riparian forest in Três Marias, MG, and to gallery forests of the Central Brazil, than to riparian forests of southsoutheast of Minas Gerais and São Paulo. The analysis of maximum, medium and minimum heights of the species showed the forest has three vertical strata. The stratum 1 (1,5m >h ` 10m) had the highest richness, density and was represented by a group shade-tolerant and light-demanding understory species. There were also individuals juvenile of species belonging to the higher strata, classified as light-demanding canopy species. The stratum 2 (10m >h ` 15m) occupied the largest part of the study area, and was considered mostly a intermediate stratum, including canopy species as well as some understory mature trees. The stratum 3 (h >15m) had the lowest density and the species which form this part of the forest have far greater number of individuals in inferior strata. This indicates the forest is recovering from anthropic disturbance suffered in the past. The presence of a major quantity of animaldispersed species and individuals emphasizes the important preservation of this riparian forest for the fauna of Araguari River Valley and whole region.
ASSUNTO(S)
estrutura vertical ecologia riparian forest similaridade florística rio araguari ecologia vegetal floristic similarity triângulo mineiro mata ciliar triângulo mineiro araguari river vertical and horizontal structure
ACESSO AO ARTIGO
http://www.bdtd.ufu.br//tde_busca/arquivo.php?codArquivo=1226Documentos Relacionados
- Composição, estrutura e aspectos ecológicos da floresta ciliar do rio Araguari no Triângulo Mineiro
- Estudo do componente árboreo de mata Ribeirinha no rio Camaquã, Cristal, RS
- Florística and fitossociological structure of ciliar bush in the basin of the river Goiana-PE.
- Relação solo-vegetação em mata ciliar do Rio Gualaxo do Norte, município de Mariana, Minas Gerais
- Composição floristica e estrutura de um remanescente de mata ciliar do rio Jacare-Pepira, Brotas,SP