Polar bear vs

Ursus maritimus compared with Rhizobium gallicum

Key Differences

• Polar bear is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	Polar bear
Kingdom	Animalia (动物界)	Bacteria (Bacteria)
Phylum	Chordata (脊索动物门)	Proteobacteria (變形菌門)
Class	Mammalia (哺乳動物)	Alphaproteobacteria (α-变形菌纲)
Order	Carnivora (食肉目)	Rhizobiales (根瘤菌目)
Family	Ursidae (Bears)	Rhizobiaceae
Genus	Ursus (Bears)	Rhizobium
Species	Ursus maritimus	Rhizobium gallicum

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

NE — Not Evaluated

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.

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan.

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。

高卢根瘤菌（Rhizobium gallicum）是根瘤菌科的固氮α-变形菌，能够与欧洲多种豆科植物共生固氮并形成根瘤。最初从法国（高卢）菜豆植物根瘤中分离，与其他根瘤菌相比表现出中等宿主特异性。有助于农业和自然生态系统中土壤氮的自然补充。