The effect of river water circulation on the distribution and functioning of reservoir microbial communities as determined by a relative distance approach

0360250 - BC 2012 RIV US eng J - Journal Article
Šimek, Karel - Comerma, M. - García, J. C. - Nedoma, Jiří - Marcé, R. - Armengol, J.
The effect of river water circulation on the distribution and functioning of reservoir microbial communities as determined by a relative distance approach.
Ecosystems. Roč. 14, č. 1 (2011), s. 1-14. ISSN 1432-9840. E-ISSN 1435-0629
R&D Projects: GA ČR(CZ) GA206/08/0015
Institutional research plan: CEZ:AV0Z60170517
Keywords : canyon-shaped reservoir * ongitudinal gradients * relative distance model * river-reservoir ecosystem * water circulation patterns * plankton succession * microbial dynamics
Subject RIV: EE - Microbiology, Virology
Impact factor: 3.495, year: 2011

The effect of river water quality parameters and its inflow rate on planktonic food webs was studied in the eutrophic Sau Reservoir, Spain. We analyzed 8 longitudinal transects covering highly variable seasonal and spatial circulation patterns. To compare biological longitudinal gradients under fluctuating water levels and different water circulation patterns, we applied a model based on the relative distance of a sampling station from the river inflow. Under different hydrological scenarios, the model characterized epilimnetic food chain successions and locations of peaks of heterotrophic microbes and plankton along the longitudinal gradient. The amplitude of microbial peaks reflected the proportion of nutrient and organic carbon rich river water that mixed into the reservoir 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.
Permanent Link: http://hdl.handle.net/11104/0197846