vs Polar bear

Kariarchaeum pelagius compared with Ursus maritimus

Key Differences

• is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Archaea (Archaea)	Animalia (动物界)
Phylum	Asgardarchaeota (Asgardarchaeota)	Chordata (脊索动物门)
Class	Heimdallarchaeia (Heimdallarchaeia)	Mammalia (哺乳動物)
Order	UBA460	Carnivora (食肉目)
Family	Kariarchaeaceae	Ursidae (Bears)
Genus	Kariarchaeum	Ursus (Bears)
Species	Kariarchaeum pelagius	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

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.

Kariarchaeum pelagius 是DPANN古菌群的成员，代表在远洋海洋环境中发现的超小型、基因组精简的微生物。与其他DPANN古菌一样，由于其生物合成能力有限，可能依赖与其他微生物的代谢协作。在外洋水域的发现，将DPANN古菌多样性的认知从沉积物和酸性环境进一步拓展。

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。