Clustered Stonewort
VU

Clustered Stonewort

Tolypella glomerata

Unknown

Photo: iNaturalist: (c) Walter Wimmer, some rights reserved (CC BY-NC), uploaded by Walter Wimmer

Overview

Clustered Stonewort (Tolypella glomerata) is a distinctive charophyte algae characterized by its clustered, spherical reproductive structures and delicate branching pattern. This aquatic macroalga forms dense underwater meadows in shallow freshwater environments, playing a crucial role in stabilizing sediments and providing habitat structure for invertebrates and fish spawning areas.

Clustered Stonewort faces significant threats from habitat degradation and loss of suitable freshwater environments. Water pollution, eutrophication, and human disturbance of aquatic ecosystems have contributed to population declines across its range, making this charophyte algae vulnerable to extinction.

Threat summary

Habitat

Clustered Stonewort inhabits shallow freshwater environments including ponds, lakes, slow-moving streams, and temporary pools with calcareous or brackish waters. This charophyte algae typically grows in clear, nutrient-poor waters with muddy or sandy substrates at depths ranging from a few centimeters to several meters.

Frequently asked questions

Why is Clustered Stonewort classified as Vulnerable?
Clustered Stonewort is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Clustered Stonewort faces significant threats from habitat degradation and loss of suitable freshwater environments. Water pollution, eutrophication, and human disturbance of aquatic ecosystems have contributed to population declines across its range, making this charophyte algae vulnerable to extinction.
Where does Clustered Stonewort live?
Clustered Stonewort occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Clustered Stonewort?
The main threats to Clustered Stonewort are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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