vs Polar bear

Ciboria betulicola compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Fungi (菌界)	Animalia (動物)
Phylum	Ascomycota (子嚢菌門)	Chordata (脊索動物)
Class	Leotiomycetes (Leotiomycetes)	Mammalia (哺乳類)
Order	Helotiales (Helotiales)	Carnivora (ネコ目)
Family	Sclerotiniaceae	Ursidae (Bears)
Genus	Ciboria	Ursus (Bears)
Species	Ciboria betulicola	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.

Ciboria betulicola is a small cup fungus in the family Sclerotiniaceae, found in temperate Europe. Like its close relative Ciboria betulae, this species is associated with birch (Betula) and fruits on fallen catkins or other birch reproductive material in moist woodland and riparian habitats. Its fruiting bodies are stalked discomycetes with the characteristic pale to brownish cup shape of the genus, typically emerging in late spring or early summer following catkin fall. The species has not been formally assessed by the IUCN. Ciboria betulicola is distinguished from the closely related Ciboria betulae and other congeners by a combination of spore morphology, ascocarp dimensions, and substrate details, with microscopic examination required for confident identification. Saprotrophic cup fungi of this type play important ecological roles in decomposing the fine organic material of woodland floors and riparian zones, facilitating nutrient return to the soil. Records of Ciboria betulicola are relatively sparse in the mycological literature, reflecting both its small size, brief fruiting season, and the general under-recording of discomycetes compared to larger macrofungi. Its distribution is thought to track birch woodland distribution across northern and central Europe, though documentation is incomplete. Molecular phylogenetic studies have helped clarify relationships within Ciboria and Sclerotiniaceae more broadly.

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。