Common Bladderwort
Utricularia vulgaris
The Common Bladderwort is a rootless, free-floating aquatic plant known for its complex suction traps. These bladders create a vacuum to rapidly ingest small crustaceans and insect larvae. During summer, the plant produces bright yellow flower stalks that emerge up to 20 cm above the water surface.
Details
Oxygen production
Low; contributes to oxygen saturation but also consumes energy for the active trapping mechanism.
Habitat function
Serves as a hiding place for juvenile fish and a hunting ground for aquatic invertebrates.
Nutrient uptake
High; extracts nutrients from the water directly through leaves and indirectly by capturing prey.
Food source for
Food source for various invertebrate grazers and detritivores after senescence.
Human use
Occasionally used as an ornamental plant in specialized garden ponds or cold-water aquaria.
Ecology
Ecological role
Regulator of zooplankton populations and important habitat for microorganisms within the periphyton layer.
Natural predators
Water snails and occasionally herbivorous fish or waterfowl.
Competitor species
Other free-floating macrophytes such as Ceratophyllum demersum or Lemna species.
Ecosystem service
Nutrient sequestration and increasing structural complexity in aquatic habitats.
Threats
Eutrophication of water bodies, drainage of bogs, and herbicide input.
Scientific profile
Profile
Reproduction
Reproduction occurs generatively via seeds and very effectively vegetatively through turions (winter buds) and fragmentation of the shoots.
Protection & threats
Main threats
Eutrophication of water bodies, herbicide input from agriculture, destruction of small water bodies, and siltation processes.