Full text
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| Author(s): |
Andrea Vanini
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2009-02-13 |
| Examining board members: |
Ricardo Ribeiro Rodrigues;
Natalia Macedo Ivanauskas;
Sergius Gandolfi;
Luiza Sumiko Kinoshita;
João Luis Ferreira Batista
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| Advisor: | Ricardo Ribeiro Rodrigues |
| Abstract | |
This study elaborated an analysis of a portion of sand coastal plain forest based in architectural characteristics. The silvigenesy or the group of processes that define the architectural construction of a forest appears as an altemative proposal for studies of forest dynamics. The variation of the trees architecture is influenced by the light entrance in these communities. These individuaIs were classified in the field in agreement with the architecture in: future trees, present trees and past trees. To make this mosaic was used a method of lines interception. The objectives of this study were: to detail the mosaic forest, of a sand coastal plain forest and their alterations in an interval of two years; and to relate the formation of the mosaic eco-units with the abiotk factor (soil). The first part of the study was accomplished in a portion of sand coastal plain forest with 10.24 ha where the method was applied. For study of the abiotic variations conditions in this area (State Park of "llha do Cardoso" - Cananéia/SP), the description . of the physical (climatic and edafic characterization) and biotic factors (floristic and fitossociologycal study) was made with a database by the Thematic Project "Diversity, dynamics and conservation in forests of the State of São Paulo: 40 ha of permanent parcels"'which this study is linked. In the second stage it was sampled a part of the area (5.76 ha) to discover the existence of variation in the silvigenic mosaic in this two years interval. These stage of the study resulted in two maps of the area. The obtained data were geo-referenceated with the TNT MIPS program, which promotes the crossing of the eco-units maps with the soil map, and with the map of the second measurement. The information generated tables that expressed the intersection areas among the maps and they allowed the accomplishment of X2 (qui-square) statistic tests and subsequent association tests denominated "analysis of adjusted residues". 1591 individuals were mapped being 1272 trees of the present, 157 of the future and 162 of the pasto As result was obtained 83% of the area formed by eco-units in dynamic balance formed by present trees, 3% of eco-units in development formed by future trees, 8% formed by eco-units in degradation with for trees of the past and 7% formed by gaps. The number of eco-units found was 116 in development, 94 in degradation and 78 in reorganization. Although the eco-unit area in development is smaller than the area of eco-unit in degradation, the number of eco-units is larger, guaranteeing the maintenance of new areas that will substitute others. That generated map was crossed with the rnap of the soil of the portion studied that it contained: "espodossolo cárbico", "organossolo háplico" and "neossolo quartzarênico". They were found some positive associations and some negatives,- indicating that several factors act in the forrnation of the mosaic in the sand coastal plain forest, inc1uding the influence of the soil water that is abundant during the whole year. In the second measurement (5.76 ha) they were found the following proportions in relation to the number of individuals and areas: 533 trees of the present, 33 trees of the future and 30 of the pasto The medium height of the canopy in the first evaluation was 12.5 m and 14.5m in the second. The proportion of eco-units area stayed c10se indicating that this ~ea continues in dynamic balance. (AU) | |
| FAPESP's process: | 03/00233-3 - Silvigenesis as a tool for the successional characterization of stretches of forest and the relationship of the silvigenetic mosaic to abiotic factors in low mountain dense evergreen rainforest (Carlos Botelho State Park) and sand coastal plain forest (Cardoso Island State Park) |
| Grantee: | Andrea Vanini |
| Support Opportunities: | Scholarships in Brazil - Doctorate |