Souza, Raquel Franco deMoura, Wanessa Kaline de Araújo2017-04-212017-04-212016-01-22MOURA, Wanessa Kaline de Araújo. Avaliação físico-química e ecotoxicológica de água e sedimento na região do baixo curso do Rio Doce, Zona Norte do Natal/RN. 2016. 118f. Tese (Doutorado em Desenvolvimento e Meio Ambiente) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2016.https://repositorio.ufrn.br/jspui/handle/123456789/22722The object of this research project was developed on the lower course of the river Doce in the city of Natal, in the districts of Lagoa Azul, Pajuçara and Redinha, along the river Doce, limit with the municipality of Extremoz, Rio Grande do Norte. The region of the Doce river plain is located in the area of environmental protection (ZPA-9). This is one of the ZPA which are not yet regulated and are observed several environmental problems arising from the use and occupation of land, featuring a blatant disregard to environmental legislation and whose protection is hampered due to the lack of specific legal mechanisms. This work aims to deploy and establish the maintenance of cultivation of Hyalella azteca species (Crustacea, Amphipoda) in the laboratory of Ecotoxicology-ECOTOX (UFRN) for ecotoxicological assessment of sediment; assess the quality of the water and the sediment using the cladocerans Ceriodaphnia dubia, Ceriodaphnia silvestrii and Hyalella azteca respectively, the lower course of the Rio Doce for ecotoxicological tests and physical and chemical analyses in order to evaluate the interference of human actions along the river. The visits were carried out in the period from 2012 to 2014. Sampling sites were named LE, R2, R3, R4 and R5. The evaluation of the quality of the water and sediments of the lower course of the Doce river, excerpt located between the lagoon of Extremoz and Redinha, through physical and chemical analyses, and ecotoxicological tests, in water and sediment, in the years 2012, 2013 and 2014, served the knowledge and answered the questions of research: ecotoxicological tests carried out in water and sediments there is a measurable response of biota in aquatic environment because the change found in physical and chemical parameters measured in water and the negative results found in at least 50 of chronic toxicity tests conducted on a monthly basis within one year showed the commitment of the Doce river water quality at least part of the year, noting that the various activities carried out in the vicinity of drainage may be contributing to the observed variations.Acesso AbertoCeriodaphnia dubiaCeriodaphnia silvestriiHyalella aztecaRecursos hídricosdoctoralThesisCNPQ::CIENCIAS BIOLOGICAS: DESENVOLVIMENTO E MEIO AMBIENTE - PRODEMA