Giant clams in Palauan reefs have captivated scientists due to their iridescent flesh. New research reveals these clams possess exceptionally efficient solar panels, far surpassing human-made technology.
Alison Sweeney, a Yale biophysicist, was intrigued by the clam’s iridescence. Previous studies showed these creatures reflect only 5% of sunlight, absorbing the rest for photosynthesis. This absorption rate is remarkably high, outperforming even the Amazon rainforest. Special cells called iridocytes distribute light deep into the clam’s tissue.
The clam’s photosynthetic algae are arranged in precise columns, maximizing efficiency. Sweeney’s team calculated a theoretical efficiency of 43% for the first photosynthesis step, double that of current solar panels. However, wild measurements indicated an even higher 60% efficiency. The researchers discovered clams might inflate and deflate their mantles, optimizing sunlight exposure to achieve a modeled 67% efficiency.
Intriguingly, satellite images of old spruce forests resemble the clam’s tissue structure. Both systems scatter light effectively, inspiring scientists to explore bioreactor designs using algae. This research highlights nature’s innovative solutions and their potential for technological advancements.
Reference- Journal PRX Energy, Scientific American, BBC, Popular Science