vs Polar bear

Aulacoseira distans compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Chromista (أسناخ صبغية)	Animalia (حيوانات)
Phylum	Ochrophyta (طحالب داكنة)	Chordata (حبليات)
Class	Bacillariophyceae (Bacillariophyceae)	Mammalia (ثدييات)
Order	Aulacoseirales (Aulacoseirales)	Carnivora (لواحم)
Family	Aulacoseiraceae	Ursidae (Bears)
Genus	Aulacoseira	Ursus (Bears)
Species	Aulacoseira distans	Ursus maritimus

Conservation Status

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute		Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Denmark, Norway, Portugal, and Sweden.

Polar bear

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Aulacoseira distans is a filamentous, centric freshwater diatom forming cylindrical cells linked in long chains by spines along the cell margins. It inhabits oligotrophic to mesotrophic freshwater lakes and ponds across boreal and temperate zones of the Northern Hemisphere. This photosynthetic diatom contributes to phytoplankton communities in cold, nutrient-poor lakes.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.