(IMAGE) Yokohama National University Caption A) Green snow, B) Red snow, C) Snow algae (members of the green algae), which are the main cause of green snow, and D) Parasitic chytrid infecting snow algae. Parasitic chytrids causes host death. Credit Yokohama National University Usage Restrictions The image may only be used with appropriate caption or credit. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.