Spring Nitzschia
Nitzschia fonticola
Nitzschia fonticola is a microscopic diatom belonging to the family Bacillariaceae. As part of the phytobenthos, it primarily colonizes stones, gravel, and aquatic plants in oligotrophic to mesotrophic waters. The cells possess a characteristic siliceous valve with a lanceolate shape and pointed ends. As a primary producer, it plays an essential role in the energy flow of aquatic ecosystems and is considered an important bioindicator for water quality.
Details
Oxygen production
High relative to biomass during the light phase.
Habitat function
Colonization of hard substrates and formation of stable biofilms.
Nutrient uptake
Actively absorbs silicate for valve construction as well as nitrate and phosphate.
Food source for
Benthic micro-herbivores (grazers).
Human use
Used in biological water quality monitoring (according to the EU Water Framework Directive) as an indicator organism.
Ecology
Ecological role
Important primary producer; serves as a food source for benthic invertebrates and contributes to oxygen enrichment.
Natural predators
Grazers such as snails, mayfly larvae, and small benthic crustaceans.
Competitor species
Other benthic diatoms such as Achnanthidium minutissimum or Navicula species.
Ecosystem service
Oxygen production, carbon fixation, and self-purification of the water body through nutrient uptake.
Threats
Eutrophication from agriculture, chemical pollution, and destruction of spring habitats.
Scientific profile
Protection & threats
Main threats
Eutrophication due to agricultural runoff, chemical pollution (herbicides), and the destruction of spring habitats through capping or engineering.