Variação da densidade do zooplâncton e relações hidrológicas em um ponto fixo do rio Guamá no entorno de Belém

Abstract

The zooplankton is a level near the base of the pelagic food chain in aquatic ecosystems, changes in the system cause major structural changes in the trophic levels of the ecosystem. Therefore, evaluating the variation of density of zooplankton in three tidal cycles and their relationship with the hydrological parameters correlated becomes important, as well as estimating the cycles of change of hydrologic parameters. The data for this study come from the collection of hydrological parameters for a device type CTD and zooplankton collected with the screening of three networks of different mesh sizes (64 120 and 200 microns). The data collected by the device after being the type CTD and stored on a computer, where it was possible to build charts and graphs with the results. It was also made a linear correlation between hydrological parameters and zooplankton. The pH of the parameter that showed the highest correlation with Gender Pseudosdiaptumus, nauplii of copepods and total zooplankton found in the network of 64 microns. The system is dynamic and possibly the relationship between the parameters and zooplankton species may be lagged, therefore correlations were low or no significant networks 120 and 200 microns.