The vivid colors in the spring are the result of pigmented bacteria in the microbial mats that grow around the edges creating the greens, yellows, oranges, and reds and the amount of color in the microbial mats depends upon the ratio of chlorophyll to carotenoids.
The vivid colors in the spring are the result of pigmented bacteria in the microbial mats that grow around the edges creating the greens, yellows, oranges, and reds and reflected skylight creating the bright blue in the center of the pool. The amount of color in the microbial mats depends upon the ratio of chlorophyll to carotenoids.