TAILIEUCHUNG - Changes in epilithic diatom communities and periphytic biomass downstream of a reservoir on a Mediterranean river (Calabria region, S Italy)

Diatom community structure and morphotype classification were studied and periphyton biomass, course particulate organic matter (CPOM), hydrogeomorphological parameters, and nutrient concentrations were measured at 4 stations downstream of the Cecita dam (Mucone River) and at 3 control sites located on different tributaries of the Mucone River in May, August, and November 2005. | Turkish Journal of Botany Turk J Bot (2015) 39: 555-569 © TÜBİTAK doi: Research Article Changes in epilithic diatom communities and periphytic biomass downstream of a reservoir on a Mediterranean river (Calabria region, S Italy) 1 2 1 1, Luana GALLO , Maurizio BATTEGAZZORE , Anna CORAPI , Lucio LUCADAMO * Department of Biology, Ecology, and Earth Sciences, University of Calabria, Arcavacata di Rende, Italy 2 Regional Agency for the Protection of the Environment (ARPA) Piedmont, Cuneo, Italy 1 Received: Accepted: Published Online: Printed: Abstract: Diatom community structure and morphotype classification were studied and periphyton biomass, course particulate organic matter (CPOM), hydrogeomorphological parameters, and nutrient concentrations were measured at 4 stations downstream of the Cecita dam (Mucone River) and at 3 control sites located on different tributaries of the Mucone River in May, August, and November 2005. The lowest values of current velocities and the highest amounts of sand deposition and CPOM accumulation were detected at the stations closest to the dam. Downstream, the confluence with the first permanent tributary (Cerreto River) of the Mucone showed a “rhythral” morphology, similar to that of the control sites. Multivariate analysis showed that the community was constantly segregated into 2 groups: G1 (stations upstream of the Cerreto inflow), dominated by early colonizers, adapted to both high and low current velocity and tolerating burial and light deficiencies; and G2 (all other stations), where the prevailing taxa were species typical of stable environments with high values of flow and abundance of coarse substrates. Genus-based morphotype classification failed to detect any differences between the 2 groups. Biomass levels were higher at station G2 than G1, while accumulation of CPOM downstream of the reservoir promoted fine

• Nông nghiệp
• River regulation
• Geofluvial morphology
• Diatom communities
• Epilithic algal biomass
• Autotrophic index
• Sewage sludge
• River sediment
• Sludge management
• To Lich River
• Heavy metal
• National technical regulation
• leadership
• regulation and incentives
• Physical Activity
• Correct Eating
• Workshop
• School Aged Children
• Aquatic Crustaceans
• Driest Desert
• Loa River
• Atacama Desert
• Antofagasta Region
• Rare and Endemic