Alpine Sulphur-Tresses vs

Alectoria ochroleuca compared with Chrysococcus radians

Key Differences

Alpine Sulphur-Tresses is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Alpine Sulphur-Tresses
Kingdom	Fungi (Fungi)	Chromista (Chromista)
Phylum	Ascomycota (Sac Fungi)	Ochrophyta (Ochrophyta)
Class	Lecanoromycetes (Lecanoromycetes)	Chrysophyceae (Chrysophyceae)
Order	Lecanorales (Lecanorales)	Chromulinales (Chromulinales)
Family	Parmeliaceae	Dinobryaceae
Genus	Alectoria	Chrysococcus
Species	Alectoria ochroleuca	Chrysococcus radians

Conservation Status

Alpine Sulphur-Tresses

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Alpine Sulphur-Tresses
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alpine Sulphur-Tresses

Habitat

Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Colombia, Norway, Sweden, and United States.

Habitat

Native to Europe and South America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Brazil, Denmark, and Sweden.

Alpine Sulphur-Tresses

The Alpine Sulphur-Tresses (Alectoria ochroleuca) is a species in the genus Alectoria. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region. Distributed across Colombia, Norway, Sweden, and United States.

Chrysococcus radians is a freshwater chrysophyte microalga in the genus Chrysococcus, class Chrysophyceae, order Chromulinales. The species epithet radians — radiating — describes a lorica with radiating spine-like projections or extensions emanating from the central body of the outer case, a morphological feature readily distinguishable under light microscopy. Radiating processes on chrysophyte loricas are thought to increase the effective surface area of the cell, potentially slowing sinking and maintaining the organism in the illuminated photic zone of freshwater lakes. C. radians has been documented from Norwegian and Swedish freshwater systems, with additional records from Denmark, consistent with a broader northern European distribution of this species. Scandinavian lakes, particularly the oligotrophic highland lakes of Norway and Sweden, harbor diverse chrysophyte communities in which Chrysococcus and related genera are frequently dominant components during spring and autumn mixing periods. The species inhabits the limnetic zone, where it engages in photosynthesis using the characteristic golden-brown chrysophyte pigments — chlorophylls a and c combined with fucoxanthin. Like other genus members, C. radians may also practice mixotrophic feeding on bacteria and dissolved organic matter, providing nutritional flexibility in oligotrophic environments. Siliceous stomatocysts produced by chrysophytes can survive in lake sediments and provide paleolimnological records of past environmental change. C. radians has not been evaluated under IUCN Red List criteria and is classified as Not Evaluated.