vs Polar bear

Methanococcus maripaludis 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 maripaludis	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 maripaludis 是甲烷球菌科中从盐沼沉积物中分离的中温嗜氢产甲烷古菌。由于为该物种开发了完善的遗传工具，它已成为研究产甲烷过程、古菌代谢和基因调控的重要模式生物。在严格厌氧条件下以氢气还原二氧化碳产生甲烷。

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。