Université de Bretagne Occidentale, Université Européenne de Bretagne, Plouzané, France.
Ann Rev Mar Sci. 2013;5:477-501. doi: 10.1146/annurev-marine-121211-172346. Epub 2012 Jul 23.
Over the past few decades, we have realized that the silica cycle is strongly intertwined with other major biogeochemical cycles, like those of carbon and nitrogen, and as such is intimately related to marine primary production, the efficiency of carbon export to the deep sea, and the inventory of carbon dioxide in the atmosphere. For nearly 20 years, the marine silica budget compiled by Tréguer et al. (1995) , with its exploration of reservoirs, processes, sources, and sinks in the silica cycle, has provided context and information fundamental to study of the silica cycle. Today, the budget needs revisiting to incorporate advances that have notably changed estimates of river and groundwater inputs to the ocean of dissolved silicon and easily dissolvable amorphous silica, inputs from the dissolution of terrestrial lithogenic silica in ocean margin sediments, reverse weathering removal fluxes, and outputs of biogenic silica (especially on ocean margins and in the form of nondiatomaceous biogenic silica). The resulting budget recognizes significantly higher input and output fluxes and notes that the recycling of silicon occurs mostly at the sediment-water interface and not during the sinking of silica particles through deep waters.
在过去的几十年中，我们已经认识到，硅质循环与其他主要的生物地球化学循环（如碳和氮循环）紧密交织在一起，因此与海洋初级生产力、碳向深海输出的效率以及大气中二氧化碳的含量密切相关。近 20 年来，特吕吉尔等人编制的海洋硅质预算（1995 年） ，探讨了硅质循环中的储层、过程、来源和汇，为研究硅质循环提供了背景和基本信息。如今，该预算需要重新修订，以纳入一些重要进展，这些进展显著改变了对河流和地下水向海洋输入溶解态硅和易溶解无定形硅、陆地岩源硅在海洋边缘沉积物中溶解的输入、反向风化去除通量以及生物硅（尤其是在海洋边缘和非硅藻生物硅的形式）输出的估计。修订后的预算显示输入和输出通量显著增加，并指出硅的再循环主要发生在水-沉积物界面，而不是通过深海水体下沉的硅颗粒。
