出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：The Pantanal constitutes the biggest floodplain of the world, forming a mosaic of different habitats, sustaining rich aquatic and terrestrial biota. This mosaic of habitats of the Pantanal is well represented in the Baro de Melgao region by the Chacororé-Sinhá Mariana Lake System, this system of parental lakes of Cuiabá river are recognized by their aquatic productivity and scenically beauty. The aquatic macrophyte are very abundant organisms being considered the most productive community in the aquatic system, with great capacity of accumulate biomass and nutrients. The samples were collected into three stations representing the Chacororé-Sinhá Mariana lake system and the transition between them. This study had as purpose to evaluate the spatial and temporal of the main nutrients in the biomass in E. crassipes in the stands of this specie in Chacororé-Sinhá Mariana “baía” system. The results showed that chacororé bay presented higher concentration of total phosphorus, mineral content, sodium, calcium and potassium of the collection stations sampled in the drought, also presented higher concentration of total nitrogen, but in the flood. The highest magnesium design was obtained in the flood on SMM collection station. This research supports another studies realized in the Pantanal about the importance of the “flood pulse” in the temporal variation of the nutrients concentration in the biomass of E. crassipes and shown that the variation of the biomass of E. crassipes in the lakes evidence the spatial heterogeneity which exists between those lakes. In this way the aquatic macrophyte can indicate the impacts resulting of the hydrological changes in this system of lakes.
