FLORISTIC AND PHYTOSOCIOLOGICAL STRUCTURE IN AN URBAN FRAGMENT OF THE ATLANTIC FOREST UNDER DIFFERENT HYDROMORPHIC CONDITIONS
FLORISTIC AND PHYTOSOCIOLOGICAL STRUCTURE IN AN URBAN FRAGMENT OF THE ATLANTIC FOREST UNDER DIFFERENT HYDROMORPHIC CONDITIONS
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DOI: 10.22533/at.ed.1222323107
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Palavras-chave: Filtros Ambientais; Nível freático; Floresta Ombrófila Mista Aluvial; Gradiente Hídrico.
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Keywords: Environmental Filters; Groundwater Level; Alluvial Mixed Ombrophilous Forest, Water Gradient.
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Abstract: Environmental filters affect the establishment, development, distribution and diversity of the tree community in forests. In this sense, the aim of this study was to investigate how soil hydromorphic conditions influence the structure and floristic diversity of a fragment of Mixed Alluvial Ombrophilous Forest at different water tables in an urban area in the municipality of Guarapuava-PR, Brazil. For this, 72 sampling subunits of 10 x 10 m (100 m2) were allocated, in each plot the Diameter at Breast Height (DBH ≥ 5 cm) of the trees were measured to calculate the phytosociological descriptors and ecological indices. The discriminant analysis detected four distinct groups in relation to the water table position. The study units of group 1, constitute areas of drained soil, group 2, intermediate characteristics, group 3, saturated soils and group 4, hydromorphic areas. The hydromorphic areas showed lower floristic diversity and higher species dominance, mainly Gymnanthes klotzschiana, Matayba elaeagnoides and Ligustrum lucidum. There is a difference in the composition of vegetation in relation to hydromorphic conditions. The closer to the river, the vegetation tends to show less diversity and certain species become dominant, decreasing competition, but increasing the number of individuals.
- Aline Cristina Stocki
- Joelmir Augustinho Mazon
- Richeliel Albert Rodrigues Silva
- Luciano Farinha Watzlawick