Detalhes bibliográficos
| Ano de defesa: |
2016 |
| Autor(a) principal: |
Matos, Gilda Maria do Amarante |
| Orientador(a): |
Ferreira, Robério Anastácio |
| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Dissertação
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Não Informado pela instituição
|
| Programa de Pós-Graduação: |
Pós-Graduação em Agricultura e Biodiversidade
|
| Departamento: |
Não Informado pela instituição
|
| País: |
Não Informado pela instituição
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
https://ri.ufs.br/handle/riufs/6770
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Resumo: |
In the state of Sergipe, few floristic and phytosociological studies have been conducted in areas of Riparian Forest. This study was conducted in order to characterize the floristic composition and phytosociological structure of a plant community in riparian area during recovery process, at Mother Nature Farm in Santana de São Francisco - Sergipe. The vegetation object of study is the result of a pilot project that used heterogeneous planting of native tree species, which aimed to obtain data to support future models of restoration in riparian degraded areas in the Lower São Francisco River region. Therefore, there was soil analysis in the area for comparison with ground data performed at the time of implementation of the initial project, floristic and phytosociological survey, with the analysis of horizontal and vertical structure, diversity index of Shannon-Weaver (H '), evenness index Peilou (J'), canopy cover (CC), floristic similarity and dispersion and successional groups syndrome. For phytosociological study of the shrubby- arboreous stratum was conducted a census of individuals present in an area of 1.66 ha, where we sampled all living individuals with bole girth at the level of 1.30 cm (CAP) ≥ 6 cm. The floristic survey of the area for all habits had total richness of 165 species, 133 genera and 51 families, with predominance of herbaceous species, represented by 44.8% of the identified species. Herbaceous families with the highest species richness were Malvaceae (16.7%), Cyperaceae (13.7%), Asteraceae (11%), Fabaceae (8.2%) Poaceae (6.8%), which together represent 56.4% of the richness in herbaceous species recorded in the area. A total 1640 individuals were sampled, belonging to 52 species, 44 genera and 20 families. Through the survey of the natural regeneration of shrub and tree species in the area, were identified individuals belonging to 70 species (38.6% and 61.4% shrubs trees), 58 genera and 25 families. Of these 70 species sampled, 57 species were not derived from planting and thus from the natural regeneration duct through dispersion. With respect the absolute density estimated was 1,025 ha-1 subjects with basal area of 9.79 m2 / ha, average individual diameter of 6.53 cm and average height of 5.65 m. Families who contributed to this floristic richness were Fabaceae, with 17 species, Anacardiaceae with five species, Rubiaceae with four species, Euphorbiaceae and Myrtaceae with three each, Capparaceae, Meliaceae, Polygonaceae, Salicaceae and Sapindaceae with two species each, the remaining families presented only one species each. The species Mimosa caesalpiniifolia Benth. with 2,70 m2 of basal area was the one with the highest values in all phytosociological parameters analyzed, a fact that may indicate a greater adaptation of species to the environment or ecological dominance of this kind. The diversity index Shannon-Wiener (H ') for sampling with 1.640 individuals was 2.78 nats / ind., the evenness index of evenness (J') of 0.70, Jentsch mix coefficient was 0.032 and Simpson's dominance index found was 0.135. The area has a high diversity of species and high dominance. The species in the study area were grouped into three categories dispersion (zoochorous, anemochoric and autochorous) and two series of categories (pioneer and climax). From these ratings was obtained 31 species (59.62%) classified as zoochorous, with 18 pioneer and 13 climax; 15 autochorous species (28.85%), with 12 pioneer and 3 climax; six anemochoric (11.54%), four pioneers and two climax. Independently of analyzed and compared physiognomy, there was a low floristic similarity with other areas of the region. Therefore, all analyzed areas are defined floristic peculiarities. It is also observed that, over the years, recomposing the soil fertility is probably due to increased nutrient cycling and also for vegetation cover which promotes a greater protection of the soil, thereby facilitating the establishment of new species in the area. |
