Centric diatom vs Polar bear

Skeletonema subsalsum compared with Ursus maritimus

Key Differences

Centric diatom is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Centric diatom	Polar bear
Kingdom	Chromista (โครมิสตา)	Animalia (สัตว์)
Phylum	Ochrophyta (Ochrophyta)	Chordata (สัตว์มีแกนสันหลัง)
Class	Bacillariophyceae (Bacillariophyceae)	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)
Order	Thalassiosirales (Thalassiosirales)	Carnivora (สัตว์กินเนื้อ)
Family	Skeletonemaceae	Ursidae (Bears)
Genus	Skeletonema	Ursus (Bears)
Species	Skeletonema subsalsum	Ursus maritimus

Conservation Status

Centric diatom

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Centric diatom

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Found across Europe (7 countries) and North America (United States).

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.

Centric diatom

The Centric Diatom (Skeletonema subsalsum) is a species in the genus Skeletonema. Found across Europe (7 countries) and North America (United States).

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.