Florística, estrutura e síndrome de dispersão de sementes em estágios sucessionais de mata ciliar no município de Arroio do Padre, RS, Brasil

• Ano de defesa: 2012
• Autor(a) principal: Venzke, Tiago Schuch Lemos
• Orientador(a): Martins, Sebastião Venâncio
• Banca de defesa: Neri, Andreza Viana , Kunz, Sustanis Horn
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Botânica
• Departamento: Botânica estrutural; Ecologia e Sistemática
• País: BR
• Palavras-chave em Português: Dispersão de sementes; Floresta estacional semidecidual; Mata ciliar; Amostragem fitossociológica
• Palavras-chave em Inglês: Seed dispersal; Semideciduous forest; Riparian; Phytosociological sampling
• Área do conhecimento CNPq: CNPQ::CIENCIAS BIOLOGICAS::BOTANICA
• Link de acesso: http://locus.ufv.br/handle/123456789/2547

In this study a phytosociological sampling of forest succession was performed in a fragment from a Semi-deciduous Seasonal Forest, in the municipality of Arroio do Padre, in the region of the municipality of Pelotas, Rio Grande do Sul State, Brazil. A floristic and phytosociological survey was conducted in the three areas, a total of 1.2ha of native forest. The areas were divided into capoeira (0.2ha five years of regeneration), secondary (0.5ha forty-five years of regeneration), and mature (0.5ha primeval forest with selective logging). Biodiversity of 72 botanic species was found distributed into 52 genera and 33 families. Trees and bushes classified in succession categories were 10 pioneers, 29 early secondary, and 30 late secondary. The other three were not determined. Dispersal syndrome of species was 62 zoochory, nine anemochory, and two autochory. Zoochory prevailed in the three phases with percentages of 82 to 93% of the species, and of 47 to 92% of individuals. The dispersal syndrome showed that the interaction with animal vectors is important in the three phases of succession, and this pattern is not different from those found in Mata Atlantica. The early stages consisted of pioneer and secondary species, whereas in the mature forest, the main populations consists of arborescents and shrubs species adapted to esciophytic environment of the understory. Biodiversity (species, genera, and families) and phytosociological parameters (height, basal area, tree diameter) had an increase over time dropout and regeneration of the forest. Thus, in the succession stages occurred different floristic and phytosociological characteristics, showing a gradient of structure and diversity over time succession of riparian forest.