Algae definition
- photosynthetic organisms
- lack true roots, stems, leaves
- mostly aquatic
- size from microscopic to large (like kelp)
- eukaryotes (green, red, brown algae)
Blue-green algae?
Properly classified as bacteria, “blue-green” algae an informal (or outdated) term. Prokaryotes without nuclei or organelles, related to bacteria, may have evolved into chloroplasts
Types and Classification
Common groups encompass unicellular green algae, filamentous forms, charophytes resembling plants, and blue-green varieties. Classification remains debated due to evolutionary diversity, with some algae sharing traits with protozoa or fungi.[plant-directory.ifas.ufl]
Ecological Roles
Algae form the base of aquatic food chains as primary producers and contribute significantly to global oxygen levels. However, excessive blooms from nutrient runoff can deplete oxygen and produce toxins harmful to wildlife and humans.[niehs.nih]
Lots about red and green algae:
