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EXPERIMENTALLY INCREASED FISH STOCK
E Symonides Floristic richness diversity dominance and species evenness in old
E Symonides M Borowiecka Plant biomass structure in old
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abundance algae amount analysed autumn average Baranowska Struga basin benthos bighead carp biomass bird bottom sediments breeding carbon changes chemical composition Chironomidae chlorophyll Cladocera components concentration crustacean decrease differences dominance dry weight dust fall Ecology Ekol elements epilimnion fish forest grass carp heavy metals impoundments increased indicate inflow input Insecta invertebrates investigations jezior Jorka watershed Masurian Kampinos Forest Lake Inulec Lake Jorzec Lake Majcz Wielki Lake Warniak Lawacz load Lumbricidae Masurian meiobenthos mussels Narew near-bottom water nests nitrogen number of species old-field Oligochaeta organic matter outflow period phosphates phosphorus phytocoenosis phytoplankton plankton Poland POLISH SUMMARY polluted ponds population precipitation release reservoir river Jorka watershed rotifer samples season sediments seston significant silver carp soil spatial stations structure Struga summer surface area suspension syrthon Table taxa tributaries trophic TSISD values vegetation Vistula Warsaw water bodies watercourses watershed Masurian Lakeland whereas zooplankton