vs Polar bear

Clostridium peptidivorans 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	Firmicutes_A	Chordata (脊索动物门)
Class	Clostridia (梭菌纲)	Mammalia (哺乳動物)
Order	Clostridiales (梭菌目)	Carnivora (食肉目)
Family	Clostridiaceae	Ursidae (Bears)
Genus	Clostridium	Ursus (Bears)
Species	Clostridium peptidivorans	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.

Clostridium peptidivorans is an anaerobic, endospore-forming bacterium in the family Clostridiaceae specialized in the fermentation of peptides and amino acids, as indicated by the species epithet meaning 'peptide-devouring.' It was isolated from anaerobic environments rich in proteinaceous material, including oil field brine waters and sediments where complex organic nitrogen compounds are abundant. Like all clostridia, it is a strictly anaerobic, Gram-positive, rod-shaped bacterium that forms resistant endospores. C. peptidivorans uses Stickland fermentation reactions — coupled oxidation and reduction of amino acid pairs — to derive energy from peptide and amino acid substrates, producing organic acids, ammonia, and other end products. The ability to metabolize peptides makes it an active participant in the anaerobic degradation of protein-rich organic matter in subsurface environments. Its discovery in oil field environments suggests that peptidivoranous clostridia play roles in the anaerobic cycling of organic nitrogen in deep subsurface biotopes, contributing to biogeochemical processes in petroleum-associated anaerobic microbial communities.