Bird's-Nest Stonewort vs Clustered Stonewort

Tolypella nidifica compared with Tolypella glomerata

Key Differences

Bird's-Nest Stonewort is Endangered while Clustered Stonewort is Vulnerable.

Taxonomic Classification

Rank	Bird's-Nest Stonewort	Clustered Stonewort
Kingdom same	Plantae (พืช)	Plantae (พืช)
Phylum same	Charophyta (Charophyta)	Charophyta (Charophyta)
Class same	Charophyceae (Charophyceae)	Charophyceae (Charophyceae)
Order same	Charales (Charales)	Charales (Charales)
Family same	Characeae	Characeae
Genus same	Tolypella	Tolypella
Species	Tolypella nidifica	Tolypella glomerata

Evolutionary Relationship

Bird's-Nest Stonewort and Clustered Stonewort share a common ancestor at the Genus level: Tolypella.

ดู: Genus: Tolypella

Conservation Status

Bird's-Nest Stonewort

EN — Endangered

Clustered Stonewort

VU — Vulnerable

Physical Characteristics

Attribute	Bird's-Nest Stonewort	Clustered Stonewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bird's-Nest Stonewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Clustered Stonewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Bird's-Nest Stonewort

The Bird's-Nest Stonewort (Tolypella nidifica) is a species in the genus Tolypella. It is currently classified as Endangered on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Clustered Stonewort

Tolypella glomerata, the clustered stonewort, is a charophyte alga in the family Characeae, found in calcareous, nutrient-poor freshwater habitats including lakes, ponds, ditches, and slow-flowing water in northwestern and northern Europe. Charophytes are macroscopic green algae with a distinctive whorl-like arrangement of branches and a complex, plant-like structure that distinguishes them from other algae. T. glomerata is encrusted with calcium carbonate deposits (hence 'stonewort'), giving it a pale, grey-green appearance and rough texture. The species colonizes clear, low-nutrient water over fine sediment or gravel substrates where competition from vascular plants is reduced by nutrient limitation. It is listed as Vulnerable by the IUCN, reflecting significant declines driven by eutrophication (nutrient enrichment from agriculture and sewage), which promotes the growth of vascular plants and phytoplankton that shade out stoneworts. Drainage, water abstraction, and peat cutting also threaten its habitats. Charophyte diversity has declined substantially across lowland Europe and North America over the past century, with many species becoming locally extinct from sites they once colonized.