Ecological and Economic Importance Pteridophytes.pptx

Ecological and Economic Importance Pteridophytes

1. ECONOMIC IMPORTANCE OF LICHENS

2. SOURCE OF FOOD Lichens have been used as a source of staple food, food colorant, and food preservative for centuries in some traditional cultures, particularly in arctic and sub-arctic regions. In some cultures, lichens are used as a staple food and are collected, dried, and stored for later use. Reindeer moss (Cladonia rangiferina) is a common food source for indigenous peoples in the Arctic and is eaten either raw or cooked. The thallus of Umbilicaria has been eaten in arctic regions in danger of striation.