vs Polar bear

Natrinema versiforme 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	Halobacteriota (Halobacteriota)	Chordata (脊索动物门)
Class	Halobacteria (盐杆菌纲)	Mammalia (哺乳動物)
Order	Halobacteriales (盐杆菌目)	Carnivora (食肉目)
Family	Natrialbaceae	Ursidae (Bears)
Genus	Natrinema	Ursus (Bears)
Species	Natrinema versiforme	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.

Natrinema versiforme是Halobacteriaceae科的一种极度嗜盐古菌，以在不同盐度条件下细胞形态可从杆状变化为不规则形为特征。栖息于盐湖、盐矿和盐沼等高盐环境中。与其他嗜盐古菌一样，需要高盐浓度来维持膜和蛋白质稳定性。

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。