Polar bear vs

Ursus maritimus compared with Xanthomonas campestris

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)	Gammaproteobacteria (γ-变形菌纲)
Order	Carnivora (食肉目)	Xanthomonadales (黃單胞菌目)
Family	Ursidae (Bears)	Xanthomonadaceae
Genus	Ursus (Bears)	Xanthomonas
Species	Ursus maritimus	Xanthomonas campestris

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 North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States.

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。

野油菜黄单胞菌（Xanthomonas campestris）是一种革兰氏阴性杆状植物病原菌，最为人熟知的是作为包括甘蓝和西兰花在内的十字花科植物黑腐病的病原体。它产生商业上有价值的胞外多糖黄原胶，寄居于全球感染植物的维管束组织中。这种好氧细菌通过感染种子、雨水飞溅和污染工具传播。