Sérvulo Batista de Rezende

Pedossistemas da Mata Atlântica: considerações pertinentes sobre a sustentabilidade

A pedological analysis was carried out on the ecologically important Atlantic Forest system, as a contribution to the study of its biodiversity. Focus is placed on some factors that can influence local diversity, such as soil depth, that varies within short distances. The reasons for prohibiting the cultivation of hilly soils by small farmers is also questioned. It is suggested that radiation, water and nutrient resources, should be emphasized, since they are essential to ecosystem functioning, instead of indirect variables. Based on pedological information, ten great environments in the Atlantic Forest were identified. Comments related to water and nutrients, and observations related to use, fragility and ecological importance are made about each stratified ecosystem. Two great ecosystems are indicated as potentially very important to diversity: shallow soil areas and rock outcrops and humic soil areas (a very important carbon sink), in the higher portions of the landscape.

Mosaico digital de aerofotos não-convencionais na avaliação de recursos naturais: estudo de caso

Pelo presente trabalho avaliou-se a utilizacao de aerofotos nao-convencionais na forma de mosaico digital, como ferramenta basica no levantamento de solos e seu uso. O aerolevantamento foi realizado em quatro microbacias do municipio de Guarapari, ES. Foram feitas oito faixas de sobrevoos fotograficos com recobrimento longitudinal de 60% e lateral de 40%. A partir da digitalizacao de fotografias com elementos no tamanho 9 x 9 cm na escala aproximada de 1:25.000, produziu-se um mosaico digital com o auxilio do software Visual Stitcher. Os mapas de solos e de uso da terra foram delineados sobre o mosaico georreferenciado, com a utilizacao de digitalizacao em tela do software Idrisi 32. O uso do mosaico digital facilitou e agilizou o processo de mapeamento dos solos e da delimitacao do uso da terra na area estudada.

Águas da região do delta do Rio Doce com ênfase no vale do Suruaca, Linhares-ES

This work aimed to evaluate the physics and chemical characteristics of the main types of waters, to relate them with the classes of soils; to use its characteristics to identify the main environments. Thirteen waters samples from delta of the Doce River were analyzed. Through the analysis of water is possible to identify some environments, for example, the thiomorphics. It was verified the presence of industry residual waters ponds with high contents of sodium and lead, indicating the possibility of environment contamination by the overflowing of the Doce river or by the direct contamination of the water table.