Responses of phytoplankton to fish predation and nutrient loading in shallow lakes: a pan-European mesocosm experiment

TY - JOUR

T1 - Responses of phytoplankton to fish predation and nutrient loading in shallow lakes: a pan-European mesocosm experiment

AU - van de Bund, W.

AU - Romo, S.

AU - Villena, M.J.

AU - Valentín, M.

AU - Van Donk, E.

AU - Vicente, E.

AU - Vakkilainen, K.

AU - Svensson, M.

AU - Stephen, D.

AU - Ståhl-Delbanco, A.

AU - Rueda, J.

AU - Moss, B.

AU - Rosa Miracle, M.

AU - Kairesalo, T.

AU - Hansson, L-A.

AU - Hietala, J.

AU - Gyllström, M.

AU - Goma, J.

AU - García, P.

AU - Fernández-Aláez, M.

AU - Fernández-Aláez, C.

AU - Ferriol, C.

AU - Collings, S.E.

AU - Bécares, E.

AU - Balayla, D.

AU - Alfonso, T.

N1 - Reporting year: 2004 Metis note: 3480; CL; AFW ; AqE; file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs2004/VandeBund_ea_3480.pdf

PY - 2004

Y1 - 2004

N2 - 1. The impacts of nutrients (phosphorus and nitrogen) and planktivorous fish on phytoplankton composition and biomass were studied in six shallow, macrophyte-dominated lakes across Europe using mesocosm experiments. 2. Phytoplankton biomass was more influenced by nutrients than by densities of planktivorous fish. Nutrient addition resulted in increased algal biomass at all locations. In some experiments, a decrease was noted at the highest nutrient loadings, corresponding to added concentrations of 1 mg L1 P and 10 mg L1 N. 3. Chlorophyll a was a more precise parameter to quantify phytoplankton biomass than algal biovolume, with lower within-treatment variability. 4. Higher densities of planktivorous fish shifted phytoplankton composition toward smaller algae (GALD <50 m). High nutrient loadings selected in favour of chlorophytes and cyanobacteria, while biovolumes of diatoms and dinophytes decreased. High temperatures also may increase the contribution of cyanobacteria to total phytoplankton biovolume in shallow lakes. [KEYWORDS: fish ; food-web interactions ; mesocosm experiments nutrients ; phytoplankton composition]

AB - 1. The impacts of nutrients (phosphorus and nitrogen) and planktivorous fish on phytoplankton composition and biomass were studied in six shallow, macrophyte-dominated lakes across Europe using mesocosm experiments. 2. Phytoplankton biomass was more influenced by nutrients than by densities of planktivorous fish. Nutrient addition resulted in increased algal biomass at all locations. In some experiments, a decrease was noted at the highest nutrient loadings, corresponding to added concentrations of 1 mg L1 P and 10 mg L1 N. 3. Chlorophyll a was a more precise parameter to quantify phytoplankton biomass than algal biovolume, with lower within-treatment variability. 4. Higher densities of planktivorous fish shifted phytoplankton composition toward smaller algae (GALD <50 m). High nutrient loadings selected in favour of chlorophytes and cyanobacteria, while biovolumes of diatoms and dinophytes decreased. High temperatures also may increase the contribution of cyanobacteria to total phytoplankton biovolume in shallow lakes. [KEYWORDS: fish ; food-web interactions ; mesocosm experiments nutrients ; phytoplankton composition]

U2 - 10.1111/j.1365-2427.2004.01307.x

DO - 10.1111/j.1365-2427.2004.01307.x

M3 - Article

SN - 0046-5070

VL - 49

SP - 1608

EP - 1618

JO - Freshwater Biology

JF - Freshwater Biology

IS - 12

ER -