caa a22 4500 445383453 CHVBK 20180317143024.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10021-010-9388-4 doi (NATIONALLICENCE)springer-10.1007/s10021-010-9388-4 The Effect of River Water Circulation on the Distribution and Functioning of Reservoir Microbial Communities as Determined by a Relative Distance Approach [Elektronische Daten] [Karel Šimek, Marta Comerma, Juan-Carlos García, Jiří Nedoma, Rafael Marcé, Joan Armengol] The effect of river water quality, its inflow rate, and temperature on planktonic food web composition and activities were studied in the eutrophic Sau Reservoir (Catalonia, NE Spain). We analyzed 8 longitudinal transects conducted between July 1996 and April 1999 covering a wide range of variability in both seasonal and spatial circulation patterns. To compare objectively the biological longitudinal gradients under seasonally fluctuating water levels and different types of water circulation patterns, we applied a model based on the relative distance of a sampling station from the river inflow. Even under different hydrological scenarios, the model was able to characterize epilimnetic food chain successions and locations of peaks of bacteria, heterotrophic nanoflagellates, ciliates, phytoplankton, and zooplankton along the longitudinal gradient. The amplitude of microbial peaks was directly related to the proportion of nutrient and organic carbon rich river water that mixed into the reservoir epilimnion. Enhanced abundances and activities of microbes were detected in spring and summer periods, mainly during events of river water overflow when a large proportion of the river was directly mixed into the epilimnion. Thus, the relative input of river water is suggested to be a useful predictor of the amplitude of the development of the epilimnetic microbial food webs in highly loaded canyon-shaped reservoirs. These results may have important implications in the context of global change in Mediterranean regions, where expected reductions in runoff may profoundly affect river water circulation patterns in reservoirs and hence organic carbon cycling in these ecosystems. Springer Science+Business Media, LLC, 2010 canyon-shaped reservoir nationallicence river-reservoir ecosystem nationallicence longitudinal gradients nationallicence water circulation patterns nationallicence plankton succession nationallicence microbial dynamics nationallicence relative distance model nationallicence Šimek Karel Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i., Hydrobiological Institute, Na Sádkách 7, 37005, České Budějovice, Czech Republic aut Comerma Marta Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut García Juan-Carlos Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut Nedoma Jiří Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i., Hydrobiological Institute, Na Sádkách 7, 37005, České Budějovice, Czech Republic aut Marcé Rafael Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut Armengol Joan Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut Ecosystems Springer-Verlag 14/1(2011-01-01), 1-14 1432-9840 14:1<1 2011 14 10021 https://doi.org/10.1007/s10021-010-9388-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-010-9388-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Šimek Karel Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i., Hydrobiological Institute, Na Sádkách 7, 37005, České Budějovice, Czech Republic aut NATIONALLICENCE 700 1- Comerma Marta Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- García Juan-Carlos Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Nedoma Jiří Biology Centre of the Academy of Sciences of the Czech Republic, v.v.i., Hydrobiological Institute, Na Sádkách 7, 37005, České Budějovice, Czech Republic aut NATIONALLICENCE 700 1- Marcé Rafael Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut NATIONALLICENCE 700 1- Armengol Joan Department of Ecology, Fluvial Dynamics and Hydrological Engineering (FLUMEN), University of Barcelona, Diagonal, 645, 08028, Barcelona, Spain aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/1(2011-01-01), 1-14 1432-9840 14:1<1 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer