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Biosilicification drives a decline of dissolved si in the oceans through geologic time

Conley, Daniel J. LU ; Frings, Patrick J. LU ; Fontorbe, Guillaume LU ; Clymans, Wim LU ; Stadmark, Johanna LU ; Hendry, Katharine R.; Marron, Alan O. and De La Rocha, Christina L. LU (2017) In Frontiers in Marine Science 4(DEC).
Abstract

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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biogeochemical cycles, Cyanobacteria, Diatoms, Silicates, Sponges
in
Frontiers in Marine Science
volume
4
issue
DEC
publisher
Frontiers Media S. A.
external identifiers
  • scopus:85037642863
DOI
10.3389/fmars.2017.00397
language
English
LU publication?
yes
id
292df7c7-d8e5-4226-a1e5-18ff304beded
date added to LUP
2018-01-05 08:34:57
date last changed
2018-03-25 04:42:09
@article{292df7c7-d8e5-4226-a1e5-18ff304beded,
  abstract     = {<p>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.</p>},
  articleno    = {397},
  author       = {Conley, Daniel J. and Frings, Patrick J. and Fontorbe, Guillaume and Clymans, Wim and Stadmark, Johanna and Hendry, Katharine R. and Marron, Alan O. and De La Rocha, Christina L.},
  keyword      = {Biogeochemical cycles,Cyanobacteria,Diatoms,Silicates,Sponges},
  language     = {eng},
  month        = {12},
  number       = {DEC},
  publisher    = {Frontiers Media S. A.},
  series       = {Frontiers in Marine Science},
  title        = {Biosilicification drives a decline of dissolved si in the oceans through geologic time},
  url          = {http://dx.doi.org/10.3389/fmars.2017.00397},
  volume       = {4},
  year         = {2017},
}