ASSOCIAÇÃO DE FATORES FÍSICO-QUIMICOS ÁS CIANOBACTÉRIAS EM LAGO RASO URBANO

Abstract

The characterization of shallow aquatic systems is of great importance for the survey of biodiversity, in order to generate information for the recovery, management and modeling of these environments, especially in relation to the flowering processes of potentially toxic cyanobacteria, representing a threat to public health, making Research of great environmental, social and economic importance. In view of the above, the present work was carried out with the purpose of characterizing the monthly fluctuation of cyanobacteria species associated to the physicochemical factors in Lago do Paó, (Mamanguape Basin), Alagoa Grande, Paraíba. Samples of abiotic and biotic variables were performed between August 2014 and August 2015. The results indicated low rainfall, except in September 2014 (101.6 mm), October 2014 (17.5 mm) and July 2015 (211.7 mm), high phosphorus values (maximum of 209.42 μg/L in December/14 and minimum of 76.62 μg/L in July/15), temperatures higher than 29 (Cylindrospermopsys raciborskii, Planktotrix agardii), 4, alkaline pH> 8, light limitations, indicating a state of turbid and eutrophic waters favoring the dominance of functional groups S1 and SN, represented by cyanobacteria considered to be potentially toxic (Cylindrospermopsys raciborskii, Planktotrix agardii). As a result, it is essential to monitor the physical, chemical and biological characteristics for the purposes of water quality conservation and public health preservation