Eliara Marin Piazza

Potential medicinal use of forest species of the Deciduous Seasonal Forest from Atlantic Forest Biome, South Brazil

The current paper focuses on potential medicinal use of forest species from Deciduous Seasonal Forest in central region of Rio Grande do Sul State, South Brazil. Floristic and phytosociological surveys were carried out in 2011 and 2012. Results were compared with the available information in scientific literature about popular knowledge and biological/pharmacological evidences. Each species was classified in use categories to diseases, symptoms our disorders based on the International Statistical Classification of Diseases and Related Health Problems (ICD). In 2011, we found a total of 31 species, 77,4% of them with medicinal use. In 2012, we found 33 species,72,7% of them with medicinal use. The species most frequently mentioned were Casearia sylvestris, Eugenia uniflora, Cabralea canjerana, Luehea divaricata, Parapiptadenia rigida and Vitex megapotamica. The main species with biological/pharmacological properties were C. sylvestris, E. uniflora, L. divaricata, V. megapotamica and Zanthoxylum rhoifolium. We concluded that there is a considerable potential for medicinal purposes to forest species from Deciduous Seasonal Forest in the study region. We recommend further studies mainly about the species Prunus myrtifolia, Zanthoxylum rhoifolium, Cabralea canjerana and Casearia sylvestris which presented references to antitumoral properties.

Padrão de distribuição e estrutura populacional de Escallonia bifida Link & Otto em área em vias de restauração no RS

A distribuicao populacional das especies florestais e um importante subsidio para o entendimento da estrutura da floresta, e seu manejo economico e conservacionista. Desse modo, o objetivo do presente trabalho e o estudo da estrutura populacional da especie nativa Escallonia bifida Link & Otto, em area em vias de restauracao na regiao central do RS. Foram amostrados todos os individuos da especie presentes na classe regenerativa e arborea nos anos de 2011 e 2012. Para avaliacao da classe arborea foram implantadas 16 parcelas de 10 x 10 m (Classe III) e 64 subparcelas de 5 x 5 m (Classe II) e para a regeneracao 64 subparcelas de 5 x 5 m (Classe I). Na classe III foram medidos individuos de CAP ≥ 15 cm, na classe II individuos de 5,1 ≥ CAP ≤ 14,9 cm e classe I: 1 ≤ CAP ≥ 5 cm. Na avaliacao da estrutura populacional foram analisados os parâmetros fitossociologicos, a distribuicao espacial atraves do indice de Morisita e a distribuicao diametrica. A populacao de Escallonia bifida apresentou diminuicao na frequencia, densidade, valor de cobertura e importância de 2011 para 2012 e comportamento agregado. A distribuicao diametrica dos individuos apresentou modificacoes estruturais de 2011 para 2012, o que pode ser indicativo de mudancas sucessionais no fragmento em estudo.

ANÁLISE COMPARATIVA DE TÉCNICAS DE FILTRAGEM ESPACIAL EM ÁREA RURAL NA REGIÃO DO MÉDIO ALTO URUGUAI – RS

The image filtering is a technique used to improve the quality of digital images through the incorporation of algorithms , which allow to eliminate unwanted regions, derived from procurement methods or inadequate capture that eventually introduce some kind of noise in images. Thus, the objective is to comparatively evaluate different existing filters in order to add to the knowledge about the process of spatial filtering, since studies of this nature are still scarce in the literature. Image were used regarding the rural municipality of Frederico Westphalen, Landsat-5/TM Imager bands 3 (0.63 to 0.69 µm), 4 (0.76 to 0.90 µm) and 5 (1,55 to 1.75 µm) of the year 1985, previously georeferenced which formed the basis for the registration of the images . It was observed that filtering processes used to demonstrate the efficiency of the filter varies with the target , changing the contrast, brightness and structure are important in the understanding of deterioration caused the original image.