A snippet of information learned from reading C. L. Kervran’s book ‘Biological Transmutations’ and a description of a systematic investigation of cave microfauna, published in the March 1966 number of Science et Avenir:
Specimens of Niphargus (a species of shrimp 15mm long living in the clay of the caves) lived for considerably long times kept in tanks containing clay and without any external food supplies. The shrimps lived in a symbiotic relationship with autotrophic and anaerobic bacteria with both microfauna emitting CO2.
Since neither could extract carbon from air, where therefore did the carbon come from?
The answer lay in the autotrophic bacteria (silicobacteria) breaking down the silica of the clay into C + O.
The general biological transmutation of Si := C + O is not factored into any existing carbon cycle model and may explain why the climate changers are having difficulty explaining the poor track record of their climate models and hence prophecies.