Least Stonewort
Nitella confervacea
Least Stonewort (Nitella confervacea) is a delicate freshwater charophyte algae characterized by its translucent green, branching structure that resembles an underwater plant. This species forms dense underwater meadows in shallow waters and plays a crucial ecological role by providing oxygen, stabilizing sediments, and creating habitat for aquatic invertebrates and fish spawning areas.
Taxonomy & Classification
Kingdom
Plantae
Phylum
Charophyta
Class
Charophyceae
Order
Charales
Family
Characeae
Genus
Nitella
Least Stonewort belongs to the family Characeae, order Charales, within the Charophyceae class.
Species Profile
Least Stonewort (Nitella confervacea) is a delicate freshwater charophyte algae characterized by its translucent green, branching structure that resembles an underwater plant. This species forms dense underwater meadows in shallow waters and plays a crucial ecological role by providing oxygen, stabilizing sediments, and creating habitat for aquatic invertebrates and fish spawning areas.
Least Stonewort (Nitella confervacea) is declining primarily due to habitat loss and degradation of its freshwater aquatic environments. Water pollution, eutrophication from agricultural runoff, and physical disturbance of shallow water bodies have severely reduced suitable habitat for this charophyte algae.
Key Facts
Habitat & Distribution
Least Stonewort inhabits shallow, clear freshwater environments including pristine lakes, slow-moving streams, and temporary pools with sandy or muddy substrates. The species requires low-nutrient, alkaline waters with good light penetration and minimal disturbance from wave action or human activities.
Threats
IUCN Red List: Endangered
Least Stonewort (Nitella confervacea) is declining primarily due to habitat loss and degradation of its freshwater aquatic environments. Water pollution, eutrophication from agricultural runoff, and physical disturbance of shallow water bodies have severely reduced suitable habitat for this charophyte algae.
Agricultural runoff and nutrient loading
Habitat loss and degradation of freshwater bodies
Water pollution and eutrophication
Physical disturbance of shallow water habitats
Water level fluctuations and hydrological changes
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
This page: SpeciesRadar (2025). Least Stonewort (Nitella confervacea). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/least-stonewort