Estudo fitossociológico de uma floresta tropical úmida no Planalto de Curuá-Uná, Amazonia brasileira
The objective of this research work was to study the structure of the forest based on floristic composition, with a view to gather ecological informations on the area and serve as a base for future forest management plans. Field-data were collected in an area of 100 hectares (block 19), representative of the plateau high forest at the Curuá-Una Experimental Station, State of Pará, brazilian Amazon. All trees with 5 cm DBH and more were fully identified in 100 sampling plots (500 m{ostrok} each). In total, 4.956 trees were identified, belonging to 188 species. To better attend the objectives, special attention has been given to the following aspects: a) species/area and species/abundance relationship; b) classification of species in order of frequency, abundance, dominance and according to their of importance, value index; c) species distribution, in space and diameter classes; d) species diversity and association; e) population stratification by species and by sampling plot grouping; analysis of respectively normal and inverse associations; f) deductions on typical characteristics of each site, by means of Nodal Analysis; g) reduction of dimensionality of the data matrix by means of Principal Components Analysis. The choice of species was based in the importance value index enabling the selection of 58 species from the 188 species identified in the area. These 58 selected species were, in a very satisfactory way, representative of the tree population structure. The 58 species selected were arranged in 7 groups, representing the 7 distinct species associations. On the other hand, the 100 sampling plots were arranged in 11 groups corresponding to 11 recognized sites. The Principal Components Analysis, of the 4 firsts principal components (Protium sagotianum, Rinorea spp, Tetragastris panamensis, Siparuna guianensis) absorved 95.3 percent of the total range data variation.
| Main Authors: | , |
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| Format: | biblioteca |
| Language: | spa |
| Published: |
Curitiba, PR (Brasil)
1986
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| Subjects: | CARACTERISTICAS DEL SITIO, DENSIDAD DE LA POBLACION, DINAMICA DE LA POBLACION, ECOLOGIA FORESTAL, ESTRUCTURA DE LA POBLACION, CLASIFICACION, MANEJO FORESTAL, ANALISIS ESTADISTICO, COMPOSICION BOTANICA, BOSQUE TROPICAL HUMEDO, AMAZONIA, BRASIL, |
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| Summary: | The objective of this research work was to study the structure of the forest based on floristic composition, with a view to gather ecological informations on the area and serve as a base for future forest management plans. Field-data were collected in an area of 100 hectares (block 19), representative of the plateau high forest at the Curuá-Una Experimental Station, State of Pará, brazilian Amazon. All trees with 5 cm DBH and more were fully identified in 100 sampling plots (500 m{ostrok} each). In total, 4.956 trees were identified, belonging to 188 species. To better attend the objectives, special attention has been given to the following aspects: a) species/area and species/abundance relationship; b) classification of species in order of frequency, abundance, dominance and according to their of importance, value index; c) species distribution, in space and diameter classes; d) species diversity and association; e) population stratification by species and by sampling plot grouping; analysis of respectively normal and inverse associations; f) deductions on typical characteristics of each site, by means of Nodal Analysis; g) reduction of dimensionality of the data matrix by means of Principal Components Analysis. The choice of species was based in the importance value index enabling the selection of 58 species from the 188 species identified in the area. These 58 selected species were, in a very satisfactory way, representative of the tree population structure. The 58 species selected were arranged in 7 groups, representing the 7 distinct species associations. On the other hand, the 100 sampling plots were arranged in 11 groups corresponding to 11 recognized sites. The Principal Components Analysis, of the 4 firsts principal components (Protium sagotianum, Rinorea spp, Tetragastris panamensis, Siparuna guianensis) absorved 95.3 percent of the total range data variation. |
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