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O objetivo deste estudo foi descrever a composicao estrutural de uma populacao de Vriesea neoglutinosa em uma restinga arbustiva no municipio de Caravelas, Bahia, e compara-la com estudos desenvolvidos para especies de grupos similares em outras restingas do pais. Para amostragem da estrutura populacional, utilizou-se o metodo de parcelas, estabelecendo 52 unidades amostrais de 100 m2 cada, totalizando 0,52 ha da amostra. Os resultados indicaram que V. neoglutinosa tem um padrao de distribuicao espacial do tipo agregado, predominantemente terrestre, influenciado pelo sistema de reproducao assexuada, promovido pelo crescimento clonal. O ambiente de borda e o interior sao locais preferidos para o seu estabelecimento (densidade e frequencia) em oposicao aos ambientes de solo nu (entre moitas). Armazena volume medio de agua de 764,4 (mL/roseta) sendo o volume medio do cone de 2702,70 (cm3/roseta) e a abertura media por ramete de 3271,96 (cm²/roseta). Verificou-se relacao positiva entre abertura e volume da roseta de cone. A presenca de populacoes, desta especie nas restingas arbustivas em Caravelas, pode promover a interacao positiva entre o ambiente e a disponibilidade de agua e nutrientes para o solo e pode facilitar a colonizacao por outras especies vegetais. Portanto, compreender o papel funcional de interacoes diretas e indiretas com outros organismos que habitam o ecossistema e fundamental para conservar este importante ecossistema que ajuda a manter a integridade do ambiente como um todo. Abstract The objective of this study was to describe the structural composition of a population from Vriesea neoglutinosa in a restinga shrubby in the municipality of Caravelas, Bahia, and compare it with studies developed for species of similar groups in other restingas in the country. For sampled structure of the population used the plot method, establishing 52 plots of 100 m2 each, totaling 0.52 ha of sample. The results indicated that V. neoglutinosa shows a pattern of spatial distribution of aggregate types, predominantly terrestrials, influenced by asexual reproduction system promoted by clonal growth. Have on the environment of the border and interior is preferred sites for their establishment (density and frequency) as opposed to nude soil environments (between shrubs). Average volume of water of 764.4 (mL rosette), but with the average volume of the cone 2702.70 (cm3/rosette) and opening an average of 3271.96 per ramets (cm²/rosette). Positive relation was found between the opening area and volume of the cone rosette. The presence of populations of this species in shrubby restingas in Caravelas can promotes positive interaction between the environment and the availability of water and nutrients to the soil and may facilitate colonization by other plant species. Therefore, understanding a functional role of direct and indirect interactions with other organisms that inhabit the ecosystem is critical to conserve this important ecosystem which helps maintain the integrity of the environment as a whole.

ambiência

Estrutura populacional de Vriesea neoglutinosa Mez em uma restinga no estado da Bahia / Population structure of Vriesea neoglutinosa Mez in a coastal plain in the state of Bahia