Title: The influence of plant-associated filter feeders on phytoplankton biomass: a mesocosm study
Authors: Vanderstukken, Maarten ×
Declerck, Steven
Pals, Annemie
De Meester, Luc
Muylaert, Koenraad #
Issue Date: Jun-2010
Publisher: Kluwer Academic Publishers
Series Title: Hydrobiologia vol:646 issue:1 pages:199-208
Abstract: Low phytoplankton biomass usually
occurs in the presence of submerged macrophytes,
possibly because submerged macrophytes enhance
top-down control of phytoplankton by offering a
refuge for efficient grazers like Daphnia against fish
predation. However, other field studies also suggest
that submerged macrophytes suppress phytoplankton
in the absence of Daphnia. In order to investigate these
mechanisms further, we conducted an outdoor mesocosm
experiment to study the effect of submerged
macrophytes (Elodea nuttallii) on phytoplankton and
zooplankton biomass. The experiment combined four
nutrient addition levels (0, 10, 100, and 1000 lg P l-1;
N/P ratio: 16) with three macrophyte levels (no
macrophytes, artificial macrophytes, and real macrophytes).
We inoculated the tanks with species-rich
inocula of phytoplankton and zooplankton but
excluded fish or macro-invertebrates. Probably due to
the lack of predators in the mesocosms, potential
grazing rates of pelagic zooplankton (estimated from
zooplankton biomass) did not differ between the
macrophyte treatment combinations. Compared to
the treatment combinations without macrophytes,
lower phytoplankton biomass occurred in the treatment
combinations with real macrophytes at all the nutrient
addition levels and in those with artificial macrophytes
at all the nutrient levels except the highest. Significantly,
higher abundances of plant-associated filter
feeders (Simocephalus vetulus and Ceriodaphnia spp.)
occurred in the treatment combinations with real and
artificial macrophytes. The estimated potential grazing
rate of these plant-associated filter feeders indicated
that these filter feeders could be responsible for the
lower phytoplankton biomass in the presence of real
and artificial macrophytes. Our results suggest that
the plant-associated filter feeders may be significant
grazers in vegetated shallow lakes.
ISSN: 0018-8158
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Faculty of Science, Campus Kulak Kortrijk
Laboratory for Aquatic Ecology and Evolutionary Biology (-)
Plant Systematics and Ecology Section - miscellaneous
Ecology, Evolution and Biodiversity Conservation Section
Biology, Campus Kulak Kortrijk
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science