vs Polar bear

Chroomonas dispersa compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Chromista (クロミスタ)	Animalia (動物)
Phylum	Cryptophyta	Chordata (脊索動物)
Class	Cryptophyceae (クリプト藻綱)	Mammalia (哺乳類)
Order	Pyrenomonadales (ピレノモナス目)	Carnivora (ネコ目)
Family	Chroomonadaceae	Ursidae (Bears)
Genus	Chroomonas	Ursus (Bears)
Species	Chroomonas dispersa	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 Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

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.

Chroomonas dispersa is a species of cryptophyte alga in the family Chroomonadaceae, found in freshwater and brackish aquatic environments. The specific epithet dispersa suggests a widely scattered or diffuse distribution or cellular arrangement. Cryptophytes in the genus Chroomonas are small, motile, unicellular flagellates widely distributed across freshwater, brackish, and marine environments globally. They are particularly important constituents of the nanoplankton and picoplankton size fractions in many aquatic systems. The combination of photosynthesis and occasional mixotrophy — the ability to ingest bacteria or dissolved organic matter — in some cryptophyte lineages gives these organisms metabolic flexibility that contributes to their ecological success across a range of trophic conditions. Chroomonas dispersa has been documented from European freshwater habitats and contributes to the baseline biodiversity of these systems. Cryptophytes as a group have been studied for their potential in biotechnology, including as sources of polyunsaturated fatty acids and natural pigments. The species has not been assessed by the IUCN.

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。