Estrutura de Populações e Relações Sinecológicas de Cnidoscolus phyllacanthus (Müll. Arg.) Pax & L. Hoffm. no Semi-Árido Nordestino

• Ano de defesa: 2007
• Autor(a) principal: Fabricante, Juliano Ricardo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraíba; Brasil; Fitotecnia e Ciências Ambientais; Programa de Pós-Graduação em Agronomia; UFPB
• Palavras-chave em Português: População vegetal; Vegetal population; Faveleira; Cnidoscolus phyllacanthus; Caatinga; Savannah; CIENCIAS AGRARIAS::AGRONOMIA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/8092

Pionneer, feature of phito-phisionomy of hyper-xerophylle savannah and damaged of dry region, faveleira [Cnidoscolus phyllacanthus (Mull. Arg.) Pax. L. Hoffm.], has multiple and potencialites. According to this, species continues sub-exploited and less known cienfically. Trying to contribute to Knowledgement of ecological behavior, the aim of this work was to analise populational structure of C. phyllacanthus and its relations with other species which occurs on cose areas, through knowledgement of bio-physical factors. It had been selected five areas with expressive occursence of C. phyllacanthus, where in each of these, were put 20 parcels of 200 m² each, total 2 ha-¹ of sample area. In each of local, it had been used a flowering-phito-social research according to developed methodology to caatinga bioma. Bio-physical data were collected in all areas and together with bio-metric means of plant, was done from used analisis. To study floristic and structure, it had been calculated usual parameters to adults and beginners. To taxon ecological behavior analisis, it had been used the morisita dispersion mean, Pearson linear correlation mean, “q” coefficient of De Liocourt, similarity mean of Jaccard, division grouping method Twinspan, distance coefficient of Bray-Curtis and main compound analisis. In approach, it had been invented 11,935 individual, distributed in 57 species. Fabaceae and Euphorbiaceae families, and Croton sonderianus, Caesalpinia pyramidalis and Aspidosperma pyrifolium, were the most representative. C. phylacanthus shwed tendencies on its behavior. Species decreases its importance specially beginners, when vegetation became damage. According to it, degradation of studied local, C. phyllacanthus accumulates structural values being important. On sample, it had been inveted 1,137 specimem of faveleira, which 893 were adults and 244 beginners. Taxon shwed an aggregate standadd in four areas, shows tendency in couple of specific places. Faveleira shwed convergence in decrease its abundance when density of some species increased, making linear correlation mean was negative in majority of analised variable. These features, linked to verified behavior by biometry of species confirm C. phyllacanthus as a pioneer. It had been observed height medium and DNS to studied population were 4.31 m and 11.5 cm respectively and estimated, total height of individuals develops, 42 cm to each gamed centimeter in diameter to soil level. Through cup projection, a space of 6 m x 6 m among plants, to pure planting of C. phyllacanthus on dry-region. According to floristic, areas I and III, were the most presented in similarity. Other group was formed and area II, and finally a fomed group among areas IV and V. So, it had been featured that faveleira occurs in different types of caatinga and applied distance, a rolling of 12 species was done. These taxons are pioneers, used to the same niche of target specie. Carried out analisis showed that taxon has a restrict ecological importance to climatic factors, being tolerant to edaphic factors. It is concluded that bio indicator conditions shows a degradation grade, climatic condition and soil fertility of areas with natural occurrence, through these ecological features indicate high facility to insertion as xerophylle on environments more damage and bess productive in dry region of northeast of Brazil.