Crescimento e sobrevivência de espécies arbóreas em plantio de enriquecimento de mata ciliar em restauração

• Autor(a) principal: Santos, Wander Laizo dos [UNESP]
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/123418; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/13-04-2015/000819742.pdf
• topic: Arvores - Crescimento; Competição (Biologia); Florestas - Restauração; Ecologia das florestas tropicais; Recuperação ecológica; Trees Growth

Studies have shown that the diversity of tropical forests undergoing restoration has not reached the expected values compared to the pre-existing native vegetation (reference ecosystems). Aiming at to increase de number of species in these forests, enrichment plantings have been recommended. The performance of seedlings of tree species planted under the canopy of forests under restoration, however, has not yet been tested experimentally. In this study, we aimed at comparatively evaluate growth and survival of nursery-raised seedlings of five native species of Tropical Semideciduous Forest, planted under the canopies of riparian forests being restored. We aimed also to elucidate the factors, besides the enrichment technique, influencing the performance of the species. We tested three different enrichment techniques (treatments) applied to five native tree species: Myroxylon peruiferum, Cedrela fissilis, Aspidosperma polyneuron, Astronium graveolens and Plinia rivularis, all non-pioneer species associated with late successional stages. We also analyzed the same species growing in the open, as a reference for what would be the development of species in conventional plantings. Enrichment treatments were: Girdling (planting in small clearings under mature trees which were deliberately killed by girdling and applying herbicide), Failure (planting in the lines, where the trees from the original planting were dead) and between lines of the original planting. For each individual planted in the open or enrichment, at the end of the dry season and at the end of the rainy season, during 27 months, we collected the following data: status (dead or alive), height, canopy diameter and stem diameter at the base. Based upon these data we calculated absolute increase in height, crown diameter and stem diameter, as well as mortality over time. For analysis of growth and survival, the entire period was considered ...