Introduction: Restingas are coastal plain ecosystems located along Eastern Brazil, corresponding to about 5 000 km. The restinga vegetation is associated with the Atlantic rainforest biome and comprises four distinct main formation zones: coastal grasslands, shrublands, open-forests and marsh zones. Especially due to coastal urbanization, this is a threatened ecosystem that, through its different shrub formations, exhibits a unique mosaic as a result of the vegetation distribution in nuclei of different covering, physiognomy and floristic composition. Objective: We aimed to characterize the above and belowground composition of a conserved, non-flooded, open-scrub, nuclei (patches of bushes) formation of restinga in Linhares, ES, southeastern Brazil. Methods: The vegetation survey was conducted using the line intercept method. Diameter and height of the first six nuclei were measured in five transects separated by 50 m, totaling 30 nuclei up to 350 m away from the shore line. The phytosociology and Shannon Index of the aboveground vegetation community were calculated. In the same 30 nuclei, leaf litter and topsoil layer (15 x 15 x 10 cm) samples were collected to survey the viable seed bank, which was later placed in a greenhouse for germination and seedling identification. The Sørensen Similarity index (SSi) was used to compare the floristic composition between the leaf litter and topsoil layer seed banks. Nuclei volume and number of species were calculated as well. Results: In the aboveground vegetation, 54 plant species belonging to 32 families were identified, totaling 1 098 individuals. The nuclei showed a diversity (H') of 3.08 nats, and an average diameter of 11.5 m (s = 9.1), area of 526.4 m2 (s = 1 081.7), and height of 2.9 m (s = 1.1). Davilla flexuosa, followed by Smilax rufescens, presented the highest IVI (Importance Value Index). A total of 1 839 seedlings from 32 species and 19 families were identified in the seed bank. Enydra sessilis (Asteraceae) had the highest seed density (544), while the family with highest species richness was Cyperaceae. A low similarity between the vegetation surveyed and the seed bank composition was found (only 5 species in common, SSi = 0.10). Conclusions: The results indicate that a post-disturbance early community, established from the seed bank, would have a substantially different species composition, but with other potential species to restore vegetation over the long-term succession.

O presente trabalho objetivou realizar um levantamento das principais práticas agroecológicas desenvolvidas no Território Baixo Sul da Bahia. As atividades iniciaram-se a partir do levantamento de informações para a identificação de propriedades rurais em transição agroecológica. Utilizou-se metodologias participativas de pesquisa-ação tendo como ferramenta um questionário e entrevistas semiestruturadas, para através destas reconhecer as práticas agroecológicas utilizadas nas propriedades e identificar saberes populares de importância para a agroecologia a partir de visitas in loco. Foram identificadas 65 propriedades, sendo que algumas destas em transição agroecológicas e outras já com certificação orgânica. Cinquenta agricultores familiares foram entrevistados, e um banco de dados com informações sobre práticas agroecológicas desenvolvidas no território foi criado. Identificou-se uma grande riqueza de conhecimentos e informações sobre agroecologia no Baixo Sul da Bahia.

No abstract

O domínio morfoclimático das caatingas apresenta uma rica diversidade fitogeográfica, entretanto, a falta de conhecimento sobre tal condição tem gerado uma exacerbada devastação de sua cobertura vegetal. Nesse sentido, o presente artigo objetiva analisar a relação entre os condicionantes climáticos e fitogeográficos na capacidade de regeneração da caatinga localizada na Unidade de Conservação (UC) Monumento Natural Grota do Angico, Alto Sertão Sergipano. Para alcançar tal intento, foram realizados os seguintes procedimentos: revisão bibliográfica e visita a campo com estabelecimento de transectos, parcelas longitudinais de 50 x 50 m, onde foram coletados e analisados dados climatológicos, e diversidade florística.

This investigation aimed to determine the density of viable seeds and to compare the floristic composition of the seed bank from different forest successional stages – initial and intermediate – at the Fonte Grande State Park, Vitória, state of Espírito Santo, Brazil. Samples of 15 × 15 × 5 cm of soil and litter were collected, in 15 points, in each successional stage. After five months cultivating these samples in a greenhouse for botanical identification, the soil showed higher seedlings density and richness of species than the litter. A total of 1,414 seedlings was quantified: 78.3% of the individuals were in the initial stage (µ = 3,280 seedlings.m-2), and 21.7% were in the intermediate stage (µ = 910 seedlings.m-2). The richness of species between the stages was similar (53.2%), 33 species occurring in both areas. The predominant life form in both stages was herbaceous, though the intermediate stage presented more trees. These patterns indicate an early phase of the intermediate stage, which, over the successional time, will probably advance to an old-growth forest.