vs Polar bear

Chitinophaga terrae 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 terrae	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 terrae is a soil bacterium within the genus Chitinophaga, family Chitinophagaceae, phylum Bacteroidota. The epithet terrae — meaning 'of the earth' or 'of the soil' — aptly describes this species' ecological niche as a terrestrial, soil-dwelling organism. Chitinophaga terrae shares the defining characteristics of the genus: Gram-negative cell morphology, gliding motility, strictly aerobic respiration, and the production of extracellular chitinases capable of hydrolysing chitin. These chitinolytic enzymes break down the long-chain polysaccharide into shorter oligomers and ultimately into N-acetylglucosamine monomers, which can then be assimilated as carbon and nitrogen sources by the bacterium and other soil inhabitants. This metabolic activity positions C. terrae as an important contributor to the decomposer community of terrestrial soils, facilitating nutrient cycling particularly in environments with high inputs of fungal and arthropod biomass. Like other Chitinophaga species, it is non-pathogenic and has been identified in a range of agricultural and natural soils globally. Industrial interest in the genus centres on chitinase production for biotechnological applications including biological pest control, biodegradable material production, and enzyme formulations for various industries. As a bacterium, C. terrae is outside the scope of IUCN assessments and is listed as Not Evaluated.

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。