Biodiversidade da nematofauna da praia de Guadalupe - PE.

Abstract

The sandy beaches are dynamic ecossystems that dominate in many temperate and tropical coastal areas. These ecossystems are intensively exploited for commercial, recreational, and especially to the coastal zone protection against wave action. Among the various representatives meiobenthonic that inhabit this ecossystem, Nematoda Phylum is the main group that dominate most benthic habitats. Therefore, this study aimed to characterize the biodiversity of nematofauna Beach Guadalupe — PE. For sampling were two collections, one in the dry and rainy in another. The samples were collected with a PVC pipe of Sem long and 3.5 cm internal diameter in the first 10 cm of sediment. In the laboratory, the sediment were separated elutn'ation by manual. The supernatant was poured into & geological set of sieves of mesh aperture of 0.044 and a diameter of 1.0 mm. The nematofauna was screened with the aid of the plate Dolffus e stereomicroscope for counting and separation of specimens. The diaphanization was made in order to clarify the internal structures in Nernatoda to occur then the identification at the generic level, through pictorial keys. In rainy and dry periods were found 6 orders, 15 families and 35 genera, including Enoploides, Mesacanthion, Trileptium, Enoplolaimus, Epacanthion, Mesacanthoides, Paramesacanthion, Anticoma, Oncholaimus, Pareurystomina, Bathylaimus, Halalaimus, Rhabdocoma, Chromadorita, Chromadorelía, Paracyatholaimus, Paracanthonchus, Cyatholaimus, Latronema, Microlaimus, Calomicrolaimus, Daptonema, Rhynchonema, Pseudosteineira, Theristus, Cobbia, Gonionchus, Metadesmolaimus, Trichotheristus, Scaptrella, Sabaiieira, Apodontium, Ascolaimus, Metachromadora and Paracyatholaimoides. Among the genera recorded, it was observed that the non-selective eaters deposits were found in the dry and predators and omnivores in the rainy season. The presence of juveniles occurred in two periods, but with greater dominance of the rainy season. This study enriches the knowledge of the biodiversity of free-living Nematoda environments sandy beaches, as well as amplify the taxonomic list of