comprise geographically restricted surveys (Almeida Jr. et al. 2009), with the exception of the review of two floristic surveys and herbarium collection, on the restingas of Ceará state, by Santos-Filho et al. (2011). It is necessary to continue studies on these formations in order to improve our knowledge about the Brazilian restingas (Almeida Jr. et al. 2009). This is essential to support land use and occupation of the coastal region (Queiroz 2007), which is particularly important to protect the few areas along the Brazilian coast that are still occupied by remnants of native vegetation. In Sergipe, Northeast's smallest state, published works in areas of restinga are still scarce, featured only by Santos et al. (2011). However, some studies, monographs and dissertations have already donebeen, as the floristic survey accomplished by Nascimento, Jr. (2011) in Santo Amaro das Brotas, on the north coast of the state. Although there are protected areas in the region (one Biological Reserve, on the northern coast of the state, and one Environmental Protection Area, on the southern coast), the increased occupation of Sergipe's coast is raising concerns about the threats to the conservation of these environments and their diversity. This work presents a list of species of Angiosperms collected in the restingas of Sergipe state, in an effort to fill the research gap of the restingas in this area. Materials and Methods Study site Situated in the Northeast Region, the state of Sergipe has an area of 21,918,354 km 2 , with a population of 2068,017 inhabitants (IBGE 2010). Located between the coordinates 9°30′ and 11°30′ S, and 36°20′ and 38°00′ W, it is limited in the north by the state of Alagoas, in the east, by the Atlantic Ocean, and in the south and west, by the state of Bahia (Figure 1). (Sacramento et al. 2007). In the sandy coastal plains, the restinga vegetation consists of a mosaic of plant communities subject to marine and fluvial-marine influence, though physiognomically distinct (CONAMA Resolution No. 07/1996). It is a very peculiar ecosystem, diverse in structure and flora composition (Assis et al. 2004). The physiognomies found may vary from psammophylous-reptant herbaceous communities, in the region close to the seashore, to coastal forests, formed by shrub and tree species, in more distant areas ofthe ocean influence (Oliveira-Filho and Carvalho 1993). The restinga vegetation plays a primary role in the consolidation of the substrate, and provides food resources for resident and migratory wildlife (Scherer et al. 2005). Despite its importance, its composition is not well known, requiring further studies (Pereira et al. 2001), particularly in Northeastern Brazil (Sacramento et al. 2007). In this region, the restingas comprise a strip of sandy substrate, that goes from Bahia state to the mouth of the Parnaíba River, between the states of Maranhão and Piauí (Almeida Jr. et al. 2007). Despite the high diversity of species in the restingas of the Northeast (Almeida Jr. et al. 2007), there are still few studies ...

The state of Sergipe has suffered extreme reduction of its Atlantic Forest area in the last decades. The objective of this study is to present an inventory of the Mata do Crasto flora, the largest Atlantic Forest Remnant in Sergipe (approximately 1,000 ha), located in the Municipality of Santa Luzia do Itanhy. An intensive survey was undertaken with monthly plant collections in the study area, for four years (1995 to 1999). Additionally, collections deposited in herbaria were consulted to complete the species list. A total of 324 species were found, belonging to 84 families and 193 genera. This study adds an additional 29 genera and 96 species to the Sergipe flora as new occurrences. The four most speciose families were the Fabaceae (33 species), Rubiaceae (24 species), Myrtaceae (23 species) and Melastomataceae (15 species), that accounted for ca. 30% of the total species. The taxonomic distinction of the area is very similar to three other lowland forests in Northeastern Brazil, although its species composition is quite distinct.

The current study presents a list of angiosperm species collected in restinga areas of Santa Isabel Biological Reserve, in the northern coast of Sergipe state. We gathered a preliminary floristic list using herbarium records, and subsequently supplemented it by performing new field samplings. The results showed considerable richness and comprised 260 species, 184 genera and 78 families. Forty-seven out of the 260 species are new records to Sergipe restingas. Fabaceae (28 species), Cyperaceae (21 species) and Rubiaceae and Poaceae (12 species) were the most representative families. Rhynchospora Vahl (six species), Polygala L. (five species) and Byrsonima Rich.ex Kunth, Cuphea P.Browne, Cyperus L. and Utricularia L. (four pecies) were the most speciose genera. The herbs were the most frequent habit (122 species or 47% of the total).

O objetivo deste estudo foi comparar a composição florística e a estrutura fitossociológica dos bosques de manguezais de áreas urbanas em Aracaju, estado de Sergipe, com diferentes tempos de regeneração e intensidades de impacto antrópico. Para o levantamento fitossociológico, foi adotado o método de parcelas múltiplas, sendo seis ou sete parcelas distribuídas equitativamente em dois transectos paralelos em quatro bosques de manguezais nos bairros 13 de julho, Porto Dantas, São Conrado e Mosqueiro. Destes, somente o bosque do Mosqueiro não apresentava tensores antrópicos contínuos como descarga de esgotos domésticos, retirada de madeira ou contribuição alóctone de sedimento. Para caracterizar a estrutura dos manguezais foram calculados os parâmetros densidade, frequência, dominância e o índice de valor de importância de cada espécie. Procedeu-se com a comparação estatística entre os bosques avaliados pelo teste de Kruskal-Wallis quanto a densidade geral e por espécie, diâmetro e altura geral dos indivíduos. Foram identificadas quatro espécies: Laguncularia racemosa, Avicennia schaueriana, Rhizophora mangle e Conocarpus erectus, que apresentaram diferenças de abundância e dominância entre os bosques analisados. De maneira geral, L. racemosa foi à espécie mais abundante e dominante nos bosques mais impactados, porém no bosque do Mosqueiro, R. mangle foi a mais dominante. Não houve diferenças significativas na densidade, diâmetro e altura geral dos indivíduos, porém a densidade de A. schaueriana e R. mangle diferiu entre os bosques. Em relação à altura, os bosques da 13 de julho e São Conrado apresentaram os maiores valores, ainda que possuíssem o menor tempo de regeneração pós-distúrbios.Phytosociology of mangroves in urban areas: a case study in Aracaju city, Sergipe stateA B S T R A C TThe aim of this paper was to compare the floristic composition and the phytosociological structure of the mangrove forests in urban areas with different levels of regeneration and intensities of anthropic impact. The study was performed in the municipality of Aracaju, Sergipe state, Brazil Northeast. For the phytosociological survey, the multiple plots method was adopted; so six or seven plots were equally distributed in two parallel transects in four mangrove forests in the neighborhoods 13 de Julho, Porto Dantas, São Conrado and Mosqueiro. Of these, only the Mosqueiro mangrove did not have continuous anthropic tensors such as discharge of domestic sewage, removal of wood or allochthonous contribution of sediment. To characterize the structure of the mangroves, the parameters density, frequency, dominance and the importance value index for each species were calculated. Statistical comparison was made among the mangroves evaluated using the Kruskal-Wallis test between general density and by species, diameter and general height of individuals. Four species were identified: Laguncularia racemosa, Avicennia schaueriana, Rhizophora mangle and Conocarpus erectus, which showed differences in abundance and dominance between the mangroves evaluated. In general, L. racemosa was the most abundant and dominant species in the most impacted mangrove, but in the Mosqueiro mangrove, R. mangle was more dominant. There were no significant differences in the density, diameter and general height of the individuals; however the density of A. schaueriana and R. mangle differed between mangroves. In relation to height, the forests of 13 de Julho and São Conrado presented the highest values, even though they had the shortest time of regeneration after disturbances.Keywords: ecotone, mangrove, forest structure, coastal zone, Brazil northeast.

A aprendizagem dos conhecimentos biológicos pode contribuir para um efetivo exercício da cidadania, sendo a utilização de recursos didáticos variados, de forma contextualizada, de grande valor para o sucesso desse processo. Este trabalho tem como objetivo analisar e discutir a importância das aulas práticas na abordagem de conteúdos de Botânica no ensino médio, em uma escola da rede estadual de Aracaju, SE, no contexto do PIBID. Foram realizadas duas oficinas, ambas com metodologias didáticas participativas, as quais foram avaliadas quali-quatitativamente. Embora “retraídos”, a princípio, os estudantes apresentaram grande interesse e participação nas atividades propostas, as quais representaram também uma oportunidade de se relacionar os conteúdos científicos com a vida diária dos alunos, revelando a necessidade de implantação de estratégias práticas no processo de ensino-aprendizagem.