Polar bear vs

Ursus maritimus compared with Pseudokephyrion alaskanum

Key Differences

• Polar bear is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	Polar bear
Kingdom	Animalia (动物界)	Chromista (色藻界)
Phylum	Chordata (脊索动物门)	Ochrophyta (淡色藻门)
Class	Mammalia (哺乳動物)	Chrysophyceae (丽生菌纲)
Order	Carnivora (食肉目)	Chromulinales (色金藻目)
Family	Ursidae (Bears)	Dinobryaceae
Genus	Ursus (Bears)	Pseudokephyrion
Species	Ursus maritimus	Pseudokephyrion alaskanum

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 Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

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。

Pseudokephyrion alaskanum是封闭在瓶形或烧瓶形壳中的金藻鞭毛藻，见于阿拉斯加以及可能的其他北部地区的湖泊和沼泽等淡水栖息地。是兼营光合作用和吞噬营养的混合营养生物。该种对亚北极和亚寒带水生生态系统的淡水浮游群落有所贡献。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway