vs 云雀

Chrysosphaerella longispina compared with Alauda arvensis

Key Differences

is Not Evaluated while 云雀 is Vulnerable.

Taxonomic Classification

Rank		云雀
Kingdom	Chromista (色藻界)	Animalia (动物界)
Phylum	Ochrophyta (淡色藻门)	Chordata (脊索动物门)
Class	Chrysophyceae (丽生菌纲)	Aves (鳥綱)
Order	Ochromonadales (棕鞭藻目)	Passeriformes (雀形目)
Family	Paraphysomonadaceae	Alaudidae
Genus	Chrysosphaerella	Alauda
Species	Chrysosphaerella longispina	Alauda arvensis

Conservation Status

NE — Not Evaluated

云雀

VU — Vulnerable

Physical Characteristics

Attribute		云雀
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

云雀

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

Range

Widely distributed across Europe (5 countries), North America (Canada, United States), and Oceania and the Pacific (Australia, New Zealand). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Chrysosphaerella longispina is a colonial chrysophyte alga in the genus Chrysosphaerella, notable for the long silica spines (longispina: Latin, long spine) that project from each cell in the colony. The genus is characterized by spherical or discoid colonies of photosynthetic cells that each secrete siliceous scales and elongated spine-like appendages, making Chrysosphaerella colonies distinctively bristled and visible under light microscopy. The long spines of C. longispina likely serve as anti-predation structures that make the colonies more difficult for zooplankton to ingest. C. longispina is found in cold, oligotrophic freshwater lakes, particularly in Scandinavia, where comprehensive chrysophyte surveys have documented its presence. Chrysosphaerella colonies contribute to freshwater primary production and the cycling of biogenic silica, which upon cell dissolution is deposited in lake sediments as microscopically identifiable remains. These silica structures are widely used by paleolimnologists to reconstruct past changes in lake water chemistry, thermal stratification, and climate. The conservation status of C. longispina has not been assessed by the IUCN; the species is listed as Not Evaluated.

云雀

云雀（Alauda arvensis）以飞行中歌唱的复杂悦耳鸣声在欧洲文学和诗歌中广受赞誉。它们在欧洲和亚洲的开阔农田、草地和荒野上空垂直飞翔数百米，同时发出长达一小时的连续鸣唱。雄鸟可发出700多种独特的鸣唱短句。曾经在欧洲农田中极为丰富的云雀，由于农业集约化，自1970年以来种群数量已下降70%以上。