Considering the increasing number of aquatic vegetation in disturbed environments by
forming reservoirs, this study analyzes information available in the literature and in
monitoring of hydropower projects documents in order to investigate the evolution studies on
aquatic macrophytes and the possibility of using the data available for the succession in new
reservoirs in the watershed Rio Tocantins prediction process. The study was conducted
through a literature review, including documentary research. In the case of this work dealt
with the documentary research data already processed, seeking information in the EIA /
RIMA, the monitoring of each hydroelectric project, in books, journals, loose publications,
specialist websites, print media and electronically available on the Internet or in libraries. In
the first chapter studies indicate that monitoring, particularly within the Operating Permit, are
not being implemented satisfactorily, falling short in several aspects needed and important to
a survey, analysis and comparison of this information. In the second chapter the results show
that the species of aquatic weeds: Salvinia auriculata, Cyperus spp, Oxycaryum cubenses and
Najas microcarpa, were the pioneers in the reservoirs monitored the Tocantins River Basin.
Also showed that the ecological types tend to differentiate themselves from the river stage for
the reservoir phase, while in the river stage dominated emerging in the reservoir phase space
sampling areas for free-floating, submerged, and were giving epiphytes. Thus the systematic
monitoring of the process contributes to the development of models to predict the occurrence
of macrophytes in reservoirs or other planned initial construction phase.
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