Chlamydomonas nivalis

Definition

Chlamydomonas nivalis is a species of green algae known for causing the phenomenon called 'watermelon snow' due to its reddish pigment. It thrives in cold environments, particularly in alpine and polar regions.

5 Must Know Facts For Your Next Test

1. Chlamydomonas nivalis produces a red carotenoid pigment called astaxanthin that protects it from UV radiation.
2. It is psychrophilic, meaning it prefers extremely cold temperatures for optimal growth.
3. The alga can photosynthesize even at low temperatures, which helps it survive in harsh climates.
4. Watermelon snow, caused by Chlamydomonas nivalis, can decrease the albedo effect, leading to faster melting of ice and snow.
5. It reproduces asexually through biflagellate zoospores that swim to new locations.

Review Questions

• What pigment does Chlamydomonas nivalis produce and what is its purpose?
• How does Chlamydomonas nivalis contribute to the phenomenon known as watermelon snow?
• In what type of environmental conditions does Chlamydomonas nivalis thrive?

Related terms

Psychrophile: An organism that thrives at very low temperatures.

Astaxanthin: A red carotenoid pigment produced by some algae and microorganisms to protect against UV radiation.

Albedo Effect: The measure of how much sunlight is reflected by a surface, with higher albedo meaning more reflection.