vs Polar bear

Bactrospora dryina compared with Ursus maritimus

Key Differences

  • is Critically Endangered 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 Arthoniomycetes (ホシゴケ菌綱) Mammalia (哺乳類)
Order Arthoniales (Arthoniales) Carnivora (ネコ目)
Family Roccellaceae Ursidae (Bears)
Genus Bactrospora Ursus (Bears)
Species Bactrospora dryina Ursus maritimus

Conservation Status

CR — Critically Endangered

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

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 5 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Denmark, Norway, Portugal, and Sweden. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

バクトロスポラ・ドリイナ(Bactrospora dryina)はヨーロッパの原生的な大西洋型オーク林の古木の滑らかな樹皮上にのみ生育する極めて希少な痂状地衣類で、細長い裂缝状の子嚢盤が特徴的である。IUCNレッドリストでは絶滅寸前(CR)に分類されており、ヨーロッパで最も脅威にさらされた地衣類の一種として知られる。数少ない老齢オーク林残存地のみに生育し、微気候変化・大気質悪化に著しく敏感な生態的指標種である。

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。

Shared Countries

Both species can be found in 1 countries:

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