Until recently, ice sheets were viewed as inert components of this cycle and largely disregarded in global models. Research in the past decade has transformed this view, demonstrating the existence of uniquely adapted microbial communities, high rates of biogeochemical/physical weathering in ice sheets...
Siliconisotopetrace elementbiogenic silicabiogeochemical cyclesSilicon (Si) is the second most abundant element in the Eartha??s crust and is an important nutrient in the ocean. The global Si cycle plays a critical role in regulating primary productivity and carbon cycling on the continents and in...
Silicon (Si) plays a crucial role in global biogeochemical cycles because it is an essential nutrient for a number of marine organisms, including some species of sponges, radiolarians, silicoflagellates, and diatoms1. Marine diatoms account for 35–70% of marine primary production2, and are ther...
2004. Carbon-silicon interactions, chap 17. In: Melillo JM, Field CB, Moldan B, Eds. Scope 61. Interactions of the major biogeochemical cycles: Global change and human impacts, vol 357. Washington DC: Island Press. pp 311–22 IUCN. 2000. Vision for water and nature: a world strategy ...
Deciduous forest ecosystems are characterized by moderate weathering release and geochemical drainage, and by a strong biological cycle (85% of the soluble Si is derived from the soil biogenic silica). In contrast, coniferous forest ecosystems have a weak biological cycle and a strong Si weathering...
In the conventional habitable zone (HZ) concept, a CO2-H2O greenhouse maintains surface liquid water. Through the water-mediated carbonate-silicate weathering cycle, atmospheric CO2 partial pressure (pCO2) responds to changes in surface temperature, stab
The biogeochemical silicon cycle in the Southern Ocean tracked by isotopic approaches Southern Ocean biogeochemistry plays a crucial role on global marine primary production by impacting the nutrient availability even in low latitude surface water. Variations in the silicon (Si) cycle are large and its...
Global Biogeochemical CyclesWischmeyer, A.G., De La Rocha, C.L., Maier-Reimer, E., Wolf-Gladrow, D.A., 2003. Control mechanisms for the oceanic distribution of silicon isotopes. Glob. Biogeochem. Cycles 17.Wischmeyer, A. G., C. L. De La Rocha, E. Maier-Reimer, and D. A. ...
J. The biogeochemical cycle of iron in the ocean. Nat. Geosci. 3, 675–682 (2010). ADS CAS Google Scholar Twining, B. S. & Baines, S. B. The trace metal composition of marine phytoplankton. Ann. Rev. Mar. Sci. 5, 191–215 (2013). PubMed Google Scholar Saito, M. A. et ...
土壤为植物提供必需的营养和水分,也是土壤动物赖以生存的栖息场所,是地球系统中维持生命最关键的要素之一,对区域可持续发展至关重要。随着人类对土壤资源的需求不断增加,土壤模拟为理解土壤生态系统、预测土壤变化和优化土壤管理方面提供了强有...