caa a22 4500 445892781 CHVBK 20180317145621.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10750-010-0571-6 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0571-6 Spatial heterogeneity and seasonal succession of phytoplankton along the longitudinal gradient in a eutrophic reservoir [Elektronische Daten] [Pavel Rychtecký, Petr Znachor] In order to evaluate the effects of contrasting hydrological scenarios on the spatial and temporal heterogeneity of phytoplankton in a reservoir, vertical chlorophyll and temperature profiles were measured and functional classification of phytoplankton was applied. From April to October 2007, at 1-2week intervals, seasonal changes in various parameters were studied along the longitudinal axis of the canyon-shaped, eutrophic Římov Reservoir (Czech Republic). At the river inflow, phytoplankton markedly differed from the rest of the reservoir, being dominated by functional groups D and J (pennate diatoms and chlorococcal algae) without a clear seasonal pattern. From April to mid-June, groups Y and P (large cryptophytes and colonial diatoms) prevailed in the whole reservoir. Phytoplankton spatial heterogeneity was the most apparent during the summer reflecting a pronounced gradient of environmental parameters from the river inflow to the dam (e.g., decreasing nutrients, increasing light availability, etc.). A dense cyanobacterial bloom (groups H1 and M) developed in the nutrient-rich transition zone, while functional Group N (desmids) dominated the phytoplankton at the same time at the dam area. In late summer, a sudden flood event considerably disrupted thermal stratification, altered nutrient and light availability, and later even resulted in cyanobacterial dominance in the whole reservoir. Additionally, our study emphasizes the importance of having an intensive phytoplankton monitoring program, which would allow for detecting severe consequences of sudden flood events on phytoplankton spatial and temporal heterogeneity, which significantly affect water quality at the dam area used for drinking water purposes. Springer Science+Business Media B.V., 2010 Phytoplankton nationallicence Reservoir nationallicence Spatial heterogeneity nationallicence Seasonal succession nationallicence Functional classification nationallicence Flood event nationallicence Rychtecký Pavel Faculty of Science, University of South Bohemia, Branišovská 31, 37005, České Budějovice, Czech Republic aut Znachor Petr Faculty of Science, University of South Bohemia, Branišovská 31, 37005, České Budějovice, Czech Republic aut Hydrobiologia Springer Netherlands 663/1(2011-03-01), 175-186 0018-8158 663:1<175 2011 663 10750 https://doi.org/10.1007/s10750-010-0571-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0571-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rychtecký Pavel Faculty of Science, University of South Bohemia, Branišovská 31, 37005, České Budějovice, Czech Republic aut NATIONALLICENCE 700 1- Znachor Petr Faculty of Science, University of South Bohemia, Branišovská 31, 37005, České Budějovice, Czech Republic aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 663/1(2011-03-01), 175-186 0018-8158 663:1<175 2011 663 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer