Estrutura da comunidade da meiofauna de Praia Formosa em Cabedelo - PB.

Abstract

Sandy beaches are sedimentary environments, accumulated by the action of the waves. In this environment, there are several types of living beings, including meiofauna, a organisms ranging from 0.045mm to 0.05mm, located between the microfauna and the macrofauna. So far there are no records of any research about meiofauna at Formosa beach, located in the municipality of Cabedelo-PB, so this study comes to fill the knowledge gaps on the meiofaunistic biodiversity of the beaches Brazil, where it closes the prospects of the beaches of the Paraiba coast in the north direction. Was A collection was carried out at the end of July 2019 along the strata of the mediolector of the Beach. Four points with different characteristics were chosen, and in each one demarcated four replicas, distributed in 1m² for the collection of biosedimentological material, making up a total of 16 samples. The extraction was carried out at a depth of 10 cm, with the aid of a 12.56cm² PVC tube of internal area. The region's meofauna community was represented by 10 taxa, namely: Nematoda, Copepoda, Tardigrada, Oligochaeta, Turbellaria, Rotifera, Nauplius, Acari, Ostracoda and Polychaeta. The Nematoda group had a higher representativeness in the community, being responsible for the highest densities (9,887.2ind.10cm-²), presenting a relative abundance of 83.52% and occurring in 100% of the samples. In general, the meiofauna of Praia Formosa in terms of abundance and frequency of occurrence was similar to other sandy beaches of the same environmental characteristics and exposed the highest densities ever recorded for the coast Paraibano. Still, the supremacy of groups like Nematoda and Copepoda as well as the presence of other groups already found in previous studies on neighboring beaches qualitative similarity between the beaches on the coast of Paraíba.