2019-05-222019-05-222012-11-14RABELO, Dayanne Mary Lima. Interações entre as comunidades macrobentônicas e os fatores ambientais associadas à marismas de Spartina alterniflora Loisel (1807) na Península Bragantina (Ajuruteua e Furo Grande), Pará, Brasil. Orientador: Cesar França Braga. 2012. 67 f. Trabalho de Curso (Bacharelado em Oceanografia) – Faculdade de Oceanografia, Instituto de Geociências, Universidade Federal do Pará , Belém, 2012. Disponível em: http://bdm.ufpa.br/jspui/handle/prefix/1350. Acesso em:http://bdm.ufpa.br/jspui/handle/prefix/1350This study aims to examine the interactions between the benthic macroinfauna structute and sediment and vegetation characteristics in saltmarshes banks on the Caeté estuary, Bragança, Pará. The sampling activity was conducted in April 2009 between sandy and muddy environments (Ajuruteua beach and Furo Grande tidal channel respectively) to determine variations in the composition and abundance of macroinfaunal species and determine the characteristics of sediment or vegetation which were most important to the structuring of assemblages associated. In each area (sandy and muddy environments), three saltmarshes were randomly selected for sampling, where four replicates for macroinfauna were randomly taken, plus a replica was taken for sediment analysis. These samples were stratified in different deep zones: upper (0-10 cm) and lower (10-20 cm). In addition, a sample of aerial and roots parts were taken in each saltmarsh for analysis of characteristics of vegetation. The principal results achieved show that in muddy environments, there is a greater amounts of fine sediments and organic matter which positively increases the abundance and promotes a diverse macroinfauna. Taller and denser saltmarshes were related at sandy environment where small values of abundance and diverse of the macrofauna were registered. In both, sandy and muddy environments, high abundance and diversity of macroinfauna were concentrated in the upper layers of sediment. In conclusion, the presence of vegetation promotes the buildup of organic matter in the sediment surface. Hence, there is an increase in macroinfaunal abundance and variety of species to take advantage of the availability of resources in the upper zones.Acesso AbertoEcologia costeiraMacrobentosEstuário do Rio Caeté - PACNPQ::CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIATrabalho de Curso - Graduação - Monografia