vs Polar bear

Achroonema gotlandicum compared with Ursus maritimus

Key Differences

• is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Bacteria (Bacteria)	Animalia (动物界)
Phylum	Bacteroidota (拟杆菌门)	Chordata (脊索动物门)
Class	Bacteroidia (擬桿菌綱)	Mammalia (哺乳動物)
Order	Sphingobacteriales (鞘氨醇杆菌目)	Carnivora (食肉目)
Family	Pelonemataceae	Ursidae (Bears)
Genus	Achroonema	Ursus (Bears)
Species	Achroonema gotlandicum	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

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Found in Sweden.

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.

哥得兰无色丝菌（Achroonema gotlandicum）是无色丝菌目中的一种无色丝状细菌，因最初在瑞典哥得兰岛附近水域采集而得名。该物种栖息于水体沉积物中，参与有机物的分解过程，是淡水微生物生态系统的重要组成部分。其系统分类地位在微生物学研究中仍存在一定争议。

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。