Relação entre conectividade de pulsos hidrológicos e vegetação ribeirinha em lagos situados na planície de inundação do rio Santa Maria, RS-Brasil

Abstract

This paper bring up informations for an integrated analysis relating phytodiversity to the system of hydrologic pulses in the riverside lakes of the Santa Maria River, near to the Marechal José de Abreu bridge of BR-290, in Rosário do Sul City, in Rio Grande do Sul. The intention is verify the relation between the vegetable formations established in this lakes, through their functional characters, with the river pulses system. The functional characters are a group of variables that, independent of the taxonomic classification, have a similarity and can be an answer from the plants to the ecosystem effects. In other hand the hydrologic system, that are the period formed from each flood and dry phase, is the main force responsible for the essential conditions to maintenance of the riverside ecosystems. In the field were realized measurements of the functional characters, life formations and altimetric quotas. In the National Water Agency (Agência Nacional de Águas ANA) website was found the historic series of quotas of the hydrologic section of reference. After preliminary process, the data were processed in the softwares IHA, MULTIV and SYNCSA. It was found correlation that prove the hypothesis that the functional characters of the existing vegetation on the riverside lakes were related to the hydroecologic variables selected by the connection of the River with these lakes.