Balestrin, Diego  Cruz, Rafael  Silveira, Geraldo  Martins, Sebastião Venâncio <br/><br/>
Hydric and Edaphic Influence on Floristic Composition in an Altered Riparian Area 

<br/><br/> Publicação on-line; 39 ref.; 2 tables; 3 illus.; Summary (En) 
<br/><br/> <br/><br/>ABSTRACT<br/><br/>Alteration of a natural ecosystem can physically, chemically and biologically affect a determined<br/>area. Therefore, this study aimed to evaluate the relation between the hydrology, soils and<br/>vegetation existing in an area changed by the implantation of a Hydroeletric Power Plant (HPP)<br/>in the municipality of Roque Gonzales, Rio Grande do Sul state. The study area was composed<br/>of three samples located downstream of the dam. This analysis was performed by the points<br/>method to verify the existence of similarity patterns between the vegetation, inundation levels<br/>and edaphic soil characteristics of each sample. As a result, greater floristic similarity was<br/>observed between the species as a relation of the spatial location with inundation levels. Thus,<br/>we can conclude that the vegetal establishment in the study area is under the direct influence of<br/>waterflow variation levels from the HPP, which contributes to defining species adaptability to<br/>these specific conditions, among others.<br/><br/>Keywords: environmental impacts, hydroelectric power plant, altered flow, riparian<br/>vegetation. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>IMPACTO AMBIENTAL<br/>HIDRELÉTRICA<br/>VAZÃO