vs Polar bear

Adlafia brockmannii compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Chromista (Chromista)	Animalia (động vật)
Phylum	Ochrophyta (Ochrophyta)	Chordata (động vật có dây sống)
Class	Bacillariophyceae (Bacillariophyceae)	Mammalia (lớp Thú)
Order	Naviculales (Naviculales)	Carnivora (bộ Ăn thịt)
Family	Naviculaceae	Ursidae (Bears)
Genus	Adlafia	Ursus (Bears)
Species	Adlafia brockmannii	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, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway 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.

Adlafia brockmannii is a small pennate diatom found in freshwater benthic habitats, typically attached to substrates in streams and lakes. Its distinctive asymmetric valve outline and raphe structure help distinguish it within the genus Adlafia. This diatom is used in paleolimnological and water quality studies as its presence or absence can reflect historical changes in water chemistry.

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.