Allelopathic effect of the aquatic macrophyte, Stratiotes aloides, on natural phytoplankton

TY - JOUR

T1 - Allelopathic effect of the aquatic macrophyte, Stratiotes aloides, on natural phytoplankton

AU - Mulderij, G.

AU - Mau, B.

AU - Smolders, A.J.P.

AU - Van Donk, E.

N1 - Reporting year: 2006 Metis note: 3776; CL; AFW ; AqE; file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs2006/Mulderij_ea_3776.pdf

PY - 2006

Y1 - 2006

N2 - A survey of different Dutch Stratiotes stands showed that the density of phytoplankton (except cyanobacteria) was always higher outside S. aloides than between the rosettes of S. aloides. Analyses of water samples revealed that nutrient limitation was unlikely to have caused the lower phytoplankton biomass in the vicinity of S. aloides. 2. An in situ incubation experiment in the Danube Delta, Romania, indicated allelopathic activity against phytoplankton in S. aloides stands. The growth rate of natural phytoplankton populations exposed to water from S. aloides stands was significantly lower than that of populations that had not been in contact with S. aloides exudates. 3. A laboratory microcosm experiment showed a significantly lower phytoplankton biomass in treatments with S. aloides exudates. Nutrient concentrations and the light intensity were high enough that the lower phytoplankton biomass could not be explained by nutrient or light limitation. [KEYWORDS: allelopathy ; exudates ; field experiment ; infochemical ; natural phytoplankton]

AB - A survey of different Dutch Stratiotes stands showed that the density of phytoplankton (except cyanobacteria) was always higher outside S. aloides than between the rosettes of S. aloides. Analyses of water samples revealed that nutrient limitation was unlikely to have caused the lower phytoplankton biomass in the vicinity of S. aloides. 2. An in situ incubation experiment in the Danube Delta, Romania, indicated allelopathic activity against phytoplankton in S. aloides stands. The growth rate of natural phytoplankton populations exposed to water from S. aloides stands was significantly lower than that of populations that had not been in contact with S. aloides exudates. 3. A laboratory microcosm experiment showed a significantly lower phytoplankton biomass in treatments with S. aloides exudates. Nutrient concentrations and the light intensity were high enough that the lower phytoplankton biomass could not be explained by nutrient or light limitation. [KEYWORDS: allelopathy ; exudates ; field experiment ; infochemical ; natural phytoplankton]

U2 - 10.1111/j.1365-2427.2006.01510.x

DO - 10.1111/j.1365-2427.2006.01510.x

M3 - Article

SN - 0046-5070

VL - 51

SP - 554

EP - 561

JO - Freshwater Biology

JF - Freshwater Biology

IS - 3

ER -