Small Boat-shaped Diatom
Encyonopsis microcephala
The Small Boat-shaped Diatom is a microscopic, unicellular alga with a characteristic boat-shaped silica shell. It belongs to the phytobenthos and colonizes various substrates in inland waters as periphyton. The cells are characterized by bilateral symmetry and fine striation of the valves.
Details
Oxygen production
Produces oxygen as a byproduct of photosynthesis directly in the benthic zone.
Habitat function
Forms complex biofilms on stones and aquatic plants, providing habitat for other microorganisms.
Nutrient uptake
Absorbs dissolved silica (silicate) for shell construction, as well as nitrogen and phosphorus from the water.
Food source for
Zoobenthos, especially grazers among the macroinvertebrates.
Human use
Scientific use as a bioindicator for assessing the ecological status of water bodies (according to WFD).
Ecology
Ecological role
Important primary producer and component of the biofilm (periphyton), serving as a food source for aquatic invertebrates.
Natural predators
Grazers such as snails, mayfly larvae, and various protozoa.
Competitor species
Other benthic diatoms such as Gomphonema species or filamentous green algae in case of nutrient surplus.
Ecosystem service
Oxygen production through photosynthesis and carbon fixation within the aquatic system.
Threats
Eutrophication of water bodies due to excessive nutrient input and chemical pollution.
Scientific profile
Protection & threats
Main threats
Eutrophication due to nitrogen and phosphorus inputs, acidification of sensitive water bodies, and physical destruction of the littoral zone.