vs Polar bear

Cobetia amphilecti compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Bacteria (Bacteria)	Animalia (動物)
Phylum	Proteobacteria (プロテオバクテリア)	Chordata (脊索動物)
Class	Gammaproteobacteria (ガンマプロテオバクテリア)	Mammalia (哺乳類)
Order	Pseudomonadales (シュードモナス目)	Carnivora (ネコ目)
Family	Halomonadaceae	Ursidae (Bears)
Genus	Cobetia	Ursus (Bears)
Species	Cobetia amphilecti	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 Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan.

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.

Cobetia amphilecti is a halophilic, gram-negative bacterium belonging to the family Halomonadaceae within the class Gammaproteobacteria. First characterized from marine and saline environments, this aerobic rod-shaped organism thrives in conditions of elevated salinity that would inhibit the growth of most other bacteria. Like other members of the genus Cobetia, it possesses a sophisticated osmotic stress response system that accumulates compatible solutes—primarily ectoine and hydroxyectoine—to balance intracellular osmotic pressure against hypersaline surroundings. Cobetia amphilecti has been isolated from coastal marine sediments and saline water samples across the Indo-Pacific region, with documented collections from Taiwanese coastal habitats. The organism is motile by means of a single polar flagellum and is capable of utilizing a broad range of organic compounds as sole carbon and energy sources, including various carbohydrates and amino acids. Its metabolic versatility allows it to occupy diverse niches in marine biogeochemical cycles, particularly in the degradation of organic matter in high-salinity environments. As a member of Halomonadaceae, Cobetia amphilecti is of biotechnological interest for its production of ectoine, a commercially valuable extremolyte used in cosmetics and pharmaceuticals for its cellular protective properties. The species has not been formally assessed for conservation status by the IUCN.

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。