Year-end Sale % OFF 
Abstract
Along its course, the Paranapanema River presents some hydroelectric dams. During the year 2001, seven of these (Chavantes, Salto Grande, Canoas II and I, Capivara, Taquaraçu and Rosana) had their periphytic community studied. Samples of periphyton in natural substratum of the epiphyton type were collected from the river banks during the dry and the rainy seasons. Overall, the periphytic biomass in reservoirs of the Paranapanema River was characterized according to the rain regime of the area with higher and irregular values in the rainy period. The periphytic community demonstrated higher values of biomass, composition and abundance in the reservoirs located in middle Paranapanema, especially in Salto Grande and Canoas I. The Rosana and the Capivara Reservoirs presented higher values of algal density, chlorophyll a and species richness. The structure of the phycoperiphytic community was controlled by several factors, especially oscillation in precipitation, secchi depth, depth, retention time, temperature and water nutrients
Highlights
Reservoirs are artificial systems of water storage for multiple uses
In the region of the Paranapanema River, there are two climatic periods well marked by the rain regime: the rainy period (Summer) and the dry period (Winter)
It is possible to identify a group of sampling sites, mostly concentrated on the right side of axis 1, which positively correlated with the high values of turbidity and electrical conductivity, corresponding to the reservoirs of Salto Grande, Canoas II and I, Rosana and Taquaruçu
Summary
Reservoirs are artificial systems of water storage for multiple uses. Depending on the location of a watershed, the size of the drainage area, the basin geomorphology, and the size and climatic factors associated with anthropogenic activity, the water quality can be affected, with probable effect on its biological diversity and on the pattern of functioning of the reservoir as a whole (Tundisi, 1999; Tundisi et al, 1999).In reservoirs, the structure of communities isActa Sci. Reservoirs are artificial systems of water storage for multiple uses. Depending on the location of a watershed, the size of the drainage area, the basin geomorphology, and the size and climatic factors associated with anthropogenic activity, the water quality can be affected, with probable effect on its biological diversity and on the pattern of functioning of the reservoir as a whole (Tundisi, 1999; Tundisi et al, 1999). Periphytic algae constitute the basis of many food webs and they can profoundly influence other aquatic communities (Lowe and Pan, 1996). They present high species richness and high densities in a few square centimeters of substratum (Wetzel, 1983).
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
