Populational and spatial structure of Cereus jamacaru DC. in two areas of 'caatinga' biome in Paraiba state, Brazil/Estrutura populacional e espacial de Cereus jamacaru DC. em duas areas de caatinga do agreste da Paraiba, Brasil

The native cacti still constitute a group of plants that require data in relation to its occurrence, distribution and dynamics with vegetation to subsidize management and conservation of families in the region. The aim of the study was to analyze the structure and the spatial distribution of Cereus...

Full description

Saved in:
Bibliographic Details
Published inCiência florestal Vol. 27; no. 1; p. 315
Main Authors Barbosa, Alex da Silva, de Andrade, Albericio Pereira, Junior, Lecio Resende Pereira, de Lucena Alcantara Bruno, Riselane, de Medeiros, Robson Luis Silva, Neto, Miguel Avelino Barbosa
Format Journal Article
LanguageSpanish
Published Universidade Federal de Santa Maria 01.01.2017
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:The native cacti still constitute a group of plants that require data in relation to its occurrence, distribution and dynamics with vegetation to subsidize management and conservation of families in the region. The aim of the study was to analyze the structure and the spatial distribution of Cereus jamacaru in a hypoxerophytic caatinga (In Campina Grande) and in a hyperxerophilic caatinga (In Monteiro) areas of semiarid of Paraiba state, Brazil. It had been plotted 200 parcels with 10mx10m in the municipalities of Campina Grande and Monteiro, PB state. In each parcel, all the individuals were sampled and labeled by measuring with the aid of tape measuring the base circumference of each specimen and height was earned with graduates PVC pipes. For evaluation of spatial structure, we obtained coordinates of each individuals, then, the maps of spatial distribution was produced. Thirty-nine 39 specimens were sampled in Campina Grande, showing basal area (BA) of 0.69 [m.sup.2], absolute density (AD) of 39 ind. [ha.sup.-1], the absolute frequency (AF) of 32% and a tendency to cluster (IGA = 1,01). In Monteiro, 38 individuals were sampled, AB = 0.47 [m.sup.2], AD = 38 ind. [ha.sup.-1], AF = 29% and a tendency to cluster (IGA = 1,11). The specimens of Cereus jamacaru showed clustering distribution pattern in the areas of secondary Caatinga, being that Monteiro's population faces recruitment problems. Thus, it could imply in reproductive unsuccessful population future. The species shows similar distribution pattern in relation to other columnar cacti. Keywords: demoecology; Cactaceae; mandacaru. As cactaceas nativas ainda constituem um grupo de plantas que necessita de estudos sobre sua ocorrencia, distribuicao e dinamica para subsidiar aces de manejo e conservacao da familia na regiao de insercao. O objetivo deste estudo foi analisar a estrutura e distribuicao espacial de Cereus jamacaru DC. em uma mata de cipo (municipio de Campina Grande) e em uma caatinga arborea (municipio de Monteiro) no semiarido da Paraiba, Brasil. Foram plotadas 100 parcelas com dimenses de 10 m x 10 m em cada area. Dentro das parcelas, todos os individuos foram etiquetados e mensurados na circunferencia da base do caule com auxilio de uma fita metrica e a altura total com auxilio de tubos de PVC graduados. A estrutura espacial das populaces foi obtida pela coleta da coordenada geografica de cada individuo em cada area e expressa por meio de mapas de distribuicao espacial. Foram amostrados 39 especimes em Campina Grande, apresentando area basal (AB) de 0,69 [m.sup.2], densidade absoluta (DA) de 39 ind. [ha.sup.-1], frequencia absoluta (FA) de 32% e tendencia ao agrupamento (IGA=1,01). Em Monteiro, foram amostrados 38 individuos, AB = 0,47 [m.sup.2], DA = 38 ind. [ha.sup.-1], FA = 29% e tendencia ao agrupamento (IGA=1,11). Os individuos de C. jamacaru apresentam padrao de distribuicao agrupado em ambas as caatingas secundarias, sendo que a populacao de Monteiro enfrenta problemas de recrutamento, o que podera implicar no insucesso reprodutivo da populacao futura. A especie apresenta padrao de distribuicao similar a outras cactaceas colunares. Palavras-chave: demoecologia; Cactaceae; mandacaru.
ISSN:1980-5098
1980-5098