vs Polar bear

Methanococcus voltae 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	Methanobacteriota_A	Chordata (脊索动物门)
Class	Methanococci (甲烷球菌纲)	Mammalia (哺乳動物)
Order	Methanococcales (甲烷球菌目)	Carnivora (食肉目)
Family	Methanococcaceae	Ursidae (Bears)
Genus	Methanococcus	Ursus (Bears)
Species	Methanococcus voltae	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.

Methanococcus voltae 是甲烷球菌科的中温产甲烷古菌，因其是最早开发出遗传转化技术的产甲烷菌之一而备受关注。栖息于海洋沉积物，以氢气为电子供体还原二氧化碳产生甲烷。其模式生物地位对阐明古菌细胞生物学和遗传学的基本方面发挥了重要作用。

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。