Analysis of herbaceous vegetation diversity in a reservoir in the Brazilian semiarid region (açude Itans – RN)

• Autor(a) principal: Costa, Diógenes Félix da Silva
• Data de Publicação: 2016
• Outros Autores: Sena, Viviane Regina Rodrigues de, Oliveira, Alisson Medeiros de, Rocha, Renato de Medeiros
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2016v29n1p25

Herbaceous plants represent a signiicant portion of the biodiversity in the Caatinga and are also found around artiicial reservoirs in different habitats. This work studied the diversity and the spatial distribution of herbaceous vegetation in the lood zone of açude Itans, a reservoir located in Caicó (which has a semiarid climate) in the state of Rio Grande do Norte. Using the spatial analysis results, the statistical data were stored and analyzed in a geographic information system (GIS) and a series of thematic maps of the study area were generated. Nine points were sampled in the water/soil ecotone of the reservoir and 142 specimens were collected. Forty-four species were identiied and there was a strong presence of weeds and/or ruderal species. The most signiicant family was Poaceae, with 37 individuals and seven species, followed by Fabaceae, with 31 individuals and ten species. Cucurbitaceae, Plantaginaceae and Portulacaceae were the least representative families. The least diverse sampling site was the transition zone upstream of the reservoir, while the area near the dam was the most diverse.