silica cycleCycling of silica in the marine environment. Silicon commonly occurs in nature as silicon dioxide (SiO2), also called silica. It cycles through the marine environment, entering primarily through riverine runoff. Silica is removed from the ocean by organisms such as diatoms and radiolarian...
However, much less is known about the role diatoms play in the open ocean; which comprises the vast majority of the oceanic surface area. Outside of the Southern Ocean, only 11 studies (prior to 2003) directly examined surface-water Si biogeochemistry in the open ocean. Current knowledge ...
- The role of copepod grazing, particularly of Calanus simillimus and Rhincalanus gigas, in the biogeochemical cycles of silicon (Si) and carbon (C) in the Antarctic Circumpolar Current (ACC) of the Southern Ocean is investigated. The two grazers show differences in feeding behavior before and...
Particularly large quantities of silicon may be accumulated by certain marine plants (for example, diatoms) and animals (for example, the Cornacuspongida and Radiolaria), which after death form huge silica deposits on the ocean floor. Cold oceans contain predominantly biogenic silts enriched in ...
Silicon isotopic signatures (未30Si) of water column silicic acid (Si(OH)4) were measured in the Southern Ocean, along a meridional transect from South Africa (Subtropical Zone) down to 57?? S (northern Weddell Gyre). This provides the first reported data of a summer transect across the ...
E.: Silicon dynamics within an intense open-ocean diatom bloom in the Pacific sector of the Southern Ocean, Deep-Sea Res. II, 48, 3997-4018, 2001.Brzezinski M A,Nelson D M,Franck V M,Sigmon D E. Silicon dynamics within an intense open-ocean diatom bloom in the Pacific sector of ...
Silicon is the only international, interdisciplinary journal solely devoted to the most important element of the 21st Century. Silicon's coverage is unique in presenting all areas of silicon research and development across all disciplines. Silicon is publishing the very latest cutting edge research on...
in planetary cores such that their depleted abundance in the silicate portion of rocky bodies documents only the final stage of a planet’s accretion5. Moreover, siderophile elements are strongly affected by metal–silicate equilibration associated with the Moon-forming impact9. In contrast, non-...
Biomineralization by marine phytoplankton, such as the silicifying diatoms and calcifying coccolithophores, plays an important role in carbon and nutrient cycling in the oceans. Silicification and calcification are distinct cellular processes with no known common mechanisms. It is thought that coccolithop...
The invention belongs to the technical field of zinc hydrometallurgy and relates to a desiliconization process in the zinc hydrometallurgy. The process mainly controls pulp in a soaking groove to alternately react in a pH value region between 1.5-2.0 and 3.5-4.0 on the basis of process steps ...