Polar bear vs

Ursus maritimus compared with Porphyrobacter tepidarius

Key Differences

Polar bear is Vulnerable while is Not Evaluated.

Taxonomic Classification

Rank	Polar bear
Kingdom	Animalia (حيوانات)	Bacteria (Bacteria)
Phylum	Chordata (حبليات)	Proteobacteria (متقلبات)
Class	Mammalia (ثدييات)	Alphaproteobacteria (متقلبات ألفا)
Order	Carnivora (لواحم)	Sphingomonadales (Sphingomonadales)
Family	Ursidae (Bears)	Erythrobacteraceae
Genus	Ursus (Bears)	Porphyrobacter
Species	Ursus maritimus	Porphyrobacter tepidarius

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

NE — Not Evaluated

Physical Characteristics

Attribute	Polar bear
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

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.

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.

Porphyrobacter tepidarius is a moderately thermophilic, aerobic anoxygenic phototrophic bacterium capable of growth at elevated temperatures, as suggested by its species name (tepidarius meaning warm). It has been isolated from thermal or warm freshwater habitats. Like other Porphyrobacter species, it contains bacteriochlorophyll and can harvest light energy as a supplementary energy source.