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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 ...
Besides, although the low abundance of the silicon in the ocean, the marvelous charming and discrepancy of silicon biomaterials such as radiolarians or diatoms, are unforeseen. In biosystems, silicon is a significant trace element in the biological systems, and the deficiency may lead to various ...
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 ...
The Enterprise gives chase to the Crystalline Entity after it destroys a Federation colony. A xenologist, who has a motivation all her own with respect to the Crystalline Entity, is assigned to the Enterprise to assist in the investigations. Commander Ri
- 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...
门基义群还适门基义群还适close proximity to the ocean门基义群还适门基义群还适 相关知识点: 试题来源: 解析 C。解析:Silicon Valley(硅谷)以高科技产业闻名,它的成功主要是因为其良好的高科技环境,包括众多科研机构、高等院校、风险投资等有利于高科技产业发展的因素。A选项丰富的自然资源并非其主要因素;B选项大...
The South China Sea (SCS) is one of the largest marginal seas in the world, but the processes that control the silicon cycle are not well understood. Here, we analyse the factors that affect the distribution of biogenic silica (bSi) in SCS sediments and discuss the silicon cycle based on...
Our findings show that isotopically light, detrital silica, likely containing glacial material, reaches the ocean and there could support a substantial proportion of diatom productivity, especially in the Arctic. Outstanding questions about silicon cycling in these crucial environments will be addressed ...