vs Polar bear

Chitinophaga taiwanensis 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	Bacteroidota (バクテロイデス門)	Chordata (脊索動物)
Class	Bacteroidia (バクテロイデス綱)	Mammalia (哺乳類)
Order	Chitinophagales (Chitinophagales)	Carnivora (ネコ目)
Family	Chitinophagaceae	Ursidae (Bears)
Genus	Chitinophaga	Ursus (Bears)
Species	Chitinophaga taiwanensis	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.

Chitinophaga taiwanensis is a species of Gram-negative, aerobic bacterium belonging to the genus Chitinophaga in the family Chitinophagaceae. As the specific epithet indicates, this species was first described from soil samples collected in Taiwan. Like all members of Chitinophaga, it possesses the enzymatic machinery to degrade chitin — the structural polysaccharide abundant in fungal cell walls, insect cuticles, and crustacean shells — making it a key participant in the terrestrial nitrogen and carbon cycles. The genus is characterised by gliding motility on semi-solid or solid surfaces, production of pigmented colonies (typically yellow, orange, or tan), and a strictly aerobic metabolism. C. taiwanensis thrives in the rich agricultural and subtropical soils of Taiwan and similar environments, where the turnover of fungal biomass and arthropod debris provides abundant chitin substrate. Research on Chitinophaga species from tropical and subtropical soils has advanced understanding of chitinolytic enzyme diversity and its applications in biocontrol of soil-borne fungal diseases affecting crops. As a bacterium, Chitinophaga taiwanensis is not assessed under IUCN Red List criteria, which are designed for animals, plants, fungi, and other eukaryotes. The species' ecological significance lies in its contribution to soil health, organic matter decomposition, and nitrogen mineralisation in agricultural and natural ecosystems.

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。