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Siliceous organisms in the ocean, such as diatoms and radiolaria, are the primary sink of dissolved silicic acid into opal silica. [32] Only 3% of the Si molecules dissolved in the ocean are exported and permanently deposited in marine sediments on the seafloor each year, demonstrating that silicon recycling is a dominant process in the oceans. [3]
Benjamin Elazari Volcani (Hebrew: בנימין אלעזרי-וולקני, born 4 January 1915, died 1 February 1999) was an Israeli microbiologist who discovered life in the Dead Sea and pioneered biological silicon research at Scripps Institution of Oceanography at the University of California, San Diego.
Silicon enters the ocean in a dissolved form such as silicic acid or silicate. [103] Since diatoms are one of the main users of these forms of silicon, they contribute greatly to the concentration of silicon throughout the ocean. Silicon forms a nutrient-like profile in the ocean due to the diatom productivity in shallow depths. [103]
[166] [167] The first formally identified diatom, the colonial Bacillaria paxillifera, was discovered and described in 1783 by Danish naturalist Otto Friedrich Müller. [166] Like many others after him, he wrongly thought that it was an animal due to its ability to move.
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Dinosaur fossils have been discovered in Hong Kong for the first time, on a remote island in the financial center’s countryside. The fossils were found on Port Island, an uninhabitable expanse ...
Winds drive ocean currents in the upper 100 meters of the ocean's surface. However, ocean currents also flow thousands of meters below the surface. These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation.
A rarely seen deep sea fish resembling a serpent was found floating dead on the ocean surface off the San Diego coast and was brought ashore for study, marine experts said. The silvery, 12-foot ...