Why does AFA grow only in Klamath Lake?

AFA is a rare species of algae and thrives only in select locations worldwide, with Klamath Lake being the sole place where significant harvestable quantities exist.  Klamath Lake
stands unique due to its remarkable mineral and trace element concentration in both water and sediments, a consequence of Mt. Mazama's massive volcanic eruption over 7700 years ago. The eruption blanketed the region with millions of tons of mineral ash. Covering approximately 140 square miles and boasting an average depth of 8 feet, Klamath Lake is fed by 17 mineral-rich rivers, which carry nutrient-rich silt from the surrounding volcanic basin. This makes Upper Klamath Lake an unparalleled nutrient trap, virtually impossible to replicate artificially. Benefiting from an abundance of sunlight, with an average of 300 sunny days per year, the lake creates an ideal environment for the world's most potent strain of AFA algae to flourish.