vs Polar bear

Microcalicium ahlneri compared with Ursus maritimus

Key Differences

is Near Threatened 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	Lecanoromycetes (チャシブゴケ菌綱)	Mammalia (哺乳類)
Order	Pertusariales (Pertusariales)	Carnivora (ネコ目)
Family	Microcaliciaceae	Ursidae (Bears)
Genus	Microcalicium	Ursus (Bears)
Species	Microcalicium ahlneri	Ursus maritimus

Conservation Status

NT — Near Threatened

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. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Microcalicium ahlneri は淡灰色の葉状体と calicioid 菌類に特徴的な有柄の小さな子器を持つ、小型ピン頭地衣類です。ヨーロッパの攪乱されていない温帯林の古い落葉樹の樹皮上に生育します。この地衣類は老齢林の条件を必要とし、大気汚染や森林管理による樹皮微小生息地の変化に敏感です。

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。