vs Polar bear

Chrysochromulina alifera compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Chromista (色藻界)	Animalia (动物界)
Phylum	Haptophyta (定鞭藻門)	Chordata (脊索动物门)
Class	Prymnesiophyceae (普林藻纲)	Mammalia (哺乳動物)
Order	Prymnesiales (定鞭金藻目)	Carnivora (食肉目)
Family	Chrysochromulinaceae	Ursidae (Bears)
Genus	Chrysochromulina	Ursus (Bears)
Species	Chrysochromulina alifera	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.

Chrysochromulina alifera is a unicellular haptophyte microalga belonging to the class Prymnesiophyceae, order Prymnesiales, family Chrysochromulinaceae. Like all members of the genus Chrysochromulina, it is characterized by the presence of a coiling haptonema, a unique organelle distinct from flagella that assists in prey capture and surface attachment. C. alifera is a nanoplankton organism, typically ranging from a few micrometers in diameter, and forms part of the phytoplankton communities in marine and occasionally brackish coastal waters. The species was documented from Norwegian and Swedish coastal waters, habitats typical for many Chrysochromulina taxa that were first described by Scandinavian phycologists during the mid-twentieth century surveys of northern European marine microflora. These waters provide cold, nutrient-rich conditions suitable for haptophyte proliferation. C. alifera, like its congeners, likely plays a role in marine carbon cycling and is capable of mixotrophic nutrition, supplementing photosynthesis by ingesting bacteria and small organic particles. The species has not been formally evaluated under IUCN criteria, as microalgal taxa at this taxonomic level are rarely assessed due to difficulties in delimiting populations and determining extinction risk in planktonic organisms. Current conservation status is listed as Not Evaluated. Its ecological significance lies within the broader context of marine microbial food webs, where haptophytes serve as primary producers and food sources for zooplankton and protozoans.