Biosilicification Drives a Decline of Dissolved Si in the Oceans through Geologic Time
| Autor: | Christina De La Rocha, Daniel J. Conley, Patrick J. Frings, Alan O. Marron, Wim Clymans, Johanna Stadmark, Katharine R. Hendry, Guillaume Fontorbe |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Biogeochemical cycle
lcsh:QH1-199.5 010504 meteorology & atmospheric sciences Earth science Archean Ocean Engineering lcsh:General. Including nature conservation geographical distribution Aquatic Science 010502 geochemistry & geophysics Oceanography Photosynthesis Fossil evidence 01 natural sciences cyanobacteria diatoms Precambrian Nutrient Geologic time scale silicates 14. Life underwater lcsh:Science sponges 0105 earth and related environmental sciences Water Science and Technology Global and Planetary Change fungi biogeochemical cycles 13. Climate action Environmental science lcsh:Q Biomineralization |
| Zdroj: | Conley, D, Frings, P, Fontorbe, G, Clymens, W, Stadmark, J, Hendry, K, Marron, A & De La Rocha, C 2017, ' Biosilicification Drives a Decline of Dissolved Si in the Oceans through Geologic Time ', Frontiers in Marine Science, vol. 4, 397 . https://doi.org/10.3389/fmars.2017.00397 Frontiers in Marine Science Frontiers in Marine Science, Vol 4 (2017) |
| Popis: | Biosilicification has driven variation in the global Si cycle over geologic time. The evolution of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures (higher plants, siliceous sponges, radiolarians, and diatoms) has driven a secular decrease in DSi in the global ocean leading to the low DSi concentrations seen today. Recent studies, however, have questioned the timing previously proposed for the DSi decreases and the concentration changes through deep time, which would have major implications for the cycling of carbon and other key nutrients in the ocean. Here, we combine relevant genomic data with geological data and present new hypotheses regarding the impact of the evolution of biosilicifying organisms on the DSi inventory of the oceans throughout deep time. Although there is no fossil evidence for true silica biomineralization until the late Precambrian, the timing of the evolution of silica transporter genes suggests that bacterial silicon-related metabolism has been present in the oceans since the Archean with eukaryotic silicon metabolism already occurring in the Neoproterozoic. We hypothesize that biological processes have influenced oceanic DSi concentrations since the beginning of oxygenic photosynthesis. (Less) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|