Paleoecologia e tafonomia da floresta petrificada do Tocantins setentrional (Bacia do Parnaíba, Permiano)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo da diversidade e atividade bacteriana em solos de floresta e sob cultivo de cana-de-açúcar

Pós-graduação em Microbiologia Agropecuária - FCAV

Ecologia do banco de sementes de trecho de floresta estacional semidecidual e germinação de sementes de Peltophorum dubium (Sprenge) Taubert (Fabaceae: Caesalpinioidea) em diferentes condições de alagamento

Pós-graduação em Ciências Biológicas (Botânica) - IBB

Floresta urbana: propostas de gestão e subsídios para políticas públicas em Rio Claro SP)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo de populações do psilídeo-de-concha Glycaspis brimblecombei (Hemiptera: Psyllidae) e de seu parasitóide Psyllaephagus bliteus (Hymenoptera: Encyrtidae) em floresta de Euclyptus camaldulensis por dois métodos de amostragem

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Dinâmica populacional do psilídeo-de-concha Glycaspis brimblecombei Moore (Hemiptera: Psyllidae) e parasitismo por Psyllaephagus bliteus Riek (Hymenoptera: Encyrtidae) em floresta de eucalipto

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Variação genética para caracteres silviculturais em banco ativo de germoplasma de espécies arbóreas do cerrado e da floresta estacional semidecidual

Pós-graduação em Agronomia - FEIS

Diversidade, padrões espaciais e temporais de anfíbios anuros em uma floresta estacional semidecidual atlântica, parque estadual do Morro do Diabo (PEMD)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Identificação e caracterização de pterígio utilizando floresta de caminhos ótimos e técnicas de otimização

Pós-graduação em Ciência da Computação - IBILCE

Epifitismo vascular em três formações vegetais distintas: mata do brejo, floresta estacional semidecidual e cerradão, pertencentes ao município de Bauru, estado de São Paulo

Pós-graduação em Ciências Biológicas (Botânica) - IBB

Florística vascular não arbórea de um fragmento de floresta estacional semidecidual no munícipio de Analândia - SP

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC

Etnobotânica de Leguminosae entre agricultores agroecológicos na Floresta Atlântica, Araponga, Minas Gerais, Brasil

This study describes the richness of Leguminosae used by 21 traditional farmers in coffee agroforestry systems (AFS) and forest fragments of the Atlantic Forest, in the municipality of Araponga, Minas Gerais, Brazil. It also presents the use categories, relative importance and the species similarity between the AFSs. Data were collected through semi-structured interviews and participant observation, between August 2005 and November 2006, directed during random walks in seven AFSs and forest fragments surrounding the State Park of Serra do Brigadeiro. The farmers cited 59 species of Leguminosae, of which 86% are native to the Atlantic Forest and used in ancient cultural practices, such as to make bullock carts. Twelve categories of use were established, among them the most important were fertilizer and firewood (21 spp each); in the AFSs, species used for soil fertilization (18 spp) are the most utilized, and in the forest, the species for firewood and technology (17 spp.) The relative importance index showed that in the forest, Piptadenia gonoacantha showed 83% of agreement for the use as wood for fencing pastures, while in the AFSs, Inga edulis scored 100% as food. The AFSs studied show little similarity of species (0.42 of the Sorensen scale), due to the selection promoted by the farmers, thus, providing room for the conservation of useful species of Leguminosae.

Distribuição espacial de atributos químicos do solo em área de pastagem e floresta

The knowledge on spatial distribution of soil properties by means of geostatistics is important as an indicator for a better soil use and management. This study aimed at evaluating the spatial distribution of soil chemical properties, in a forest and pasture area in Manicoré, Amazonas State, Brazil. Grids with 70.00 m x 70.00 m, with regular spacing of 10.00 m x 10.00 m, totaling 64 points, were established, and then soil samples were collected at the depths of 0.0-0.20 m and 0.40-0.60 m and had their chemical properties determined. Data were analyzed by using descriptive statistics and geostatistics, and the sampling density analysis was based on the coefficient of variation and semivariograms range. The mean and median values were adjusted to the closest values, indicating normal distribution, while the spherical, exponential and gaussian models were adjusted to the soil chemical properties. It was concluded that the geostatistics provided adequate information for understanding the spatial distribution. The forest area showed a higher spatial continuity and the pasture area a lower sampling density. The chemical properties showed differences in the spatial variability, while the range represented better the estimates for sampling density and spacing, in the forest and pasture area.

Geoestatística na avaliação dos atributos físicos em latossolo sob floresta nativa e pastagem na Região de Manicoré, Amazonas

The use of geostatistical techniques allows detection of the existence of dependence and the spatial distribution of soil properties, thus constituting an important tool in the analysis and detailed description of the behavior of soil physical properties. The aim of the present study was to use geostatistics in assessment of physical properties in a Latossolo (Oxisol) dystrophic under native forest and pasture in the Amazon region of Manicore. Grids with of 70 x 70 m were established in native forest and pasture, and points were marked in these grids spaced at every 10 m, for a total of 64 points. These points were then georeferenced and in each one, soil samples (128) were collected at the depths of 0.00-0.20 and 0.40-0.60 m for a survey of their physical properties. These grids are parallel at a distance of 100 m from one another. The following determinations were made: texture, bulk density and particle density, macroporosity, microporosity, total porosity and aggregate stability in water. After tabulating the data, descriptive statistical analysis and geostatistical analysis were performed. The pasture had a slight variation in its physical properties in relation to native forest, with a high coefficient of variation and weak spatial dependence. The scaled semivariograms were able to satisfactorily reproduce the spatial behavior of the properties in the same pattern as the individual semivariograms, and the use of the parameter range of the semivariogram was efficient for determining the optimal sampling density for the environments under study. The geostatistical results indicate that the removal of native forest for establishing pasture altered the natural variability of the physical properties.