caa a22 4500 445892463 CHVBK 20180317145621.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10750-011-0688-2 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0688-2 Physical factors and dissolved reactive silica affect phytoplankton community structure and dynamics in a lowland eutrophic river (Po river, Italy) [Elektronische Daten] [Silvia Tavernini, Enrica Pierobon, Pierluigi Viaroli] We tested the hypothesis that species composition and persistence of phytoplankton communities in nutrient rich lowland rivers depends mainly on physical factors. The study aimed to analyse the effects of water discharge, temperature and chemistry on phytoplankton dynamic and species composition in the lowland reach of the eutrophic Po river (Italy). Both taxonomical and morpho-functional methods were used. True planktonic and tychoplanktic (i.e. detached taxa of benthic origin that remain in suspension) species were found, among which only a few taxa and functional groups prevailed. Diatoms were the most abundant, with a clear dominance of species either sensitive to the onset of water stratification or well adapted to turbid waters. Phytoplankton abundance, biomass and chlorophyll-a followed similar trends, attaining the highest values in summer, at low discharge rates. Correlation and multivariate analysis revealed that the development of a stable phytoplankton community was mainly controlled by water discharge rates. Namely, changes in water flow rates induced major variations in the community structure. The seasonal succession of phytoplankton assemblages was also related to water temperature and dissolved reactive silica availability to some extent overlapping flow effects. Springer Science+Business Media B.V., 2011 Large river nationallicence Discharge nationallicence Algal assemblages nationallicence Seasonality nationallicence Functional groups nationallicence Tavernini Silvia Department of Environmental Sciences, University of Parma, Viale G.P. Usberti, 11/A, 43100, Parma, Italy aut Pierobon Enrica Department of Environmental Sciences, University of Parma, Viale G.P. Usberti, 11/A, 43100, Parma, Italy aut Viaroli Pierluigi Department of Environmental Sciences, University of Parma, Viale G.P. Usberti, 11/A, 43100, Parma, Italy aut Hydrobiologia Springer Netherlands 669/1(2011-07-01), 213-225 0018-8158 669:1<213 2011 669 10750 https://doi.org/10.1007/s10750-011-0688-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0688-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tavernini Silvia Department of Environmental Sciences, University of Parma, Viale G.P. Usberti, 11/A, 43100, Parma, Italy aut NATIONALLICENCE 700 1- Pierobon Enrica Department of Environmental Sciences, University of Parma, Viale G.P. Usberti, 11/A, 43100, Parma, Italy aut NATIONALLICENCE 700 1- Viaroli Pierluigi Department of Environmental Sciences, University of Parma, Viale G.P. Usberti, 11/A, 43100, Parma, Italy aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 669/1(2011-07-01), 213-225 0018-8158 669:1<213 2011 669 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer