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Planktonic Food Web Structure along the Sau Reservoir (Spain) in Summer 1997
Author(s) -
Comerma Marta,
García Juan Carlos,
Armengol Joan,
Romero Maria,
Šimek Karel
Publication year - 2001
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/1522-2632(200104)86:2<195::aid-iroh195>3.0.co;2-m
Subject(s) - microbial food web , epilimnion , dominance (genetics) , food web , plankton , ecological succession , ecology , ciliate , biology , food chain , zooplankton , environmental science , eutrophication , predation , hypolimnion , nutrient , biochemistry , gene
We studied the planktonic food web in eutrophic Sau Reservoir (Catalonia, NE Spain). Along the longitudinal axis from the Ter River downstream to the dam, we characterized a microbial succession of food web dominance of bacteria‐HNF‐ciliates. The Ter River transports a large load of organic material into the reservoir, with a bacterial density of ∼9 · 10 6 large cells per ml. While at the first lacustrine station of the Reservoir HNF were the dominant bacterial consumers, at the others, an oligotrich ciliate, Halteria grandinella, was the main protozoan bacterivore. Most of the bacterial production in the reservoir epilimnion was consumed by grazing. The spatial succession of the reservoir microbial food webs was followed downstream by maximum densities of their potential predators among zoo‐plankters – rotifers, and early developmental stages of copepods.