2019-04-102019-04-102009-06-26CUNHA, Celly Jennifer da Silva. Estrutura da comunidade fitoplanctônica do estuário do rio Marapanim (Pará, Brasil). Orientadora: Vanessa Bandeira da Costa. 2009. 48 f. Trabalho de Curso (Bacharelado em Oceanografia) – Faculdade de Oceanografia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2009. Disponível em: http://bdm.ufpa.br/jspui/handle/prefix/1262. Acesso em:.http://bdm.ufpa.br/jspui/handle/prefix/1262The Coastal Zone is the transition between terrestrial and marine environments, which are known for their high biomass production and ability to support major fish stocks. Inserted in this context, is the phytoplankton community, which forms the basis of the aquatic food chain. The study of the composition and temporal distribution of such a community is crucial to understand the main mechanisms of functioning of aquatic ecosystems. This study aims to characterize the structure and dynamics of phytoplankton community and its spatial-temporal variation along the estuary of the river Marapanim (Pará, Brazil). To achieve this goal were collected during the September/2006 and February/2007 in two sampling profiles distributed throughout the estuary. Samples for the qualitative study were obtained from trawls horizontal subsurface water, while those for the quantification of chlorophyll was obtained through direct collection. The structure of the phytoplankton community of the estuary of the river Marapanim was represented by four divisions: Cyanophyta, Chlorophyta, Dinophyta and Bacillariophyta, which is the group with higher taxonomic richness, with emphasis on species such as Rhizosolenia setigera, Dimeregramma minor, Chaetoceros sp. and Bacillaria paxillifera. Diatoms were frequent and dominant in both seasonal periods, was recorded the presence of marine planktonic species nerítica, marine planktonic oceanic, coastal and marine planktonic marine-nerítica ocean. Already the phytoplankton biomass showed higher rates in the rainy season, which may be related to the high concentration of nutrients brought by continental drainage. In the period studied was possible to observe that the rainfall regime exercised significant influence on the composition and phytoplankton biomass (chlorophyll a), which can be considered the main factor controlling the dynamics of these organisms in the estuary of the river Marapanim.Acesso AbertoFitoplânctonEstuáriosRio Marapanim - PACNPQ::CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIATrabalho de Curso - Graduação - Monografia