https://www.selleckchem.com/pr....oducts/gsk3326595-ep
These isotopic data showed that sponges living in marine slope and basinal environments displayed small Si isotope fractionations relative to coeval radiolarians. By constructing a mathematical model of the major fluxes and reservoirs in the marine silica cycle and the physiology of silica biomineralization, we found that the concentration of dissolved silica in seawater was less than ~150 μM during early Paleozoic time-a value that is significantly lower than previous estimates. We posit that the topology of the early Pale
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