Nutrient Supply to Planetary Biospheres From Anoxic Weathering of Mafic Oceanic Crust

@article{Syverson2020NutrientST,
  title={Nutrient Supply to Planetary Biospheres From Anoxic Weathering of Mafic Oceanic Crust},
  author={Drew D. Syverson and Christopher T. Reinhard and Terry T Isson and Cerys Holstege and Joachim A. R. Katchinoff and Benjamin M. Tutolo and Barbara Etschmann and Joёl Brugger and Noah J. Planavsky},
  journal={Geophysical Research Letters},
  year={2020},
  volume={48}
}
Phosphorus is an essential element for life, and the phosphorous cycle is widely believed to be a key factor limiting the extent of Earth's biosphere and its impact on remotely detectable features of Earth's atmospheric chemistry. Continental weathering is conventionally considered to be the only source of bioavailable phosphorus to the marine biosphere, with submarine hydrothermal processes acting as a phosphorus sink. Here, we use a novel 29Si tracer technique to demonstrate that alteration… 

Phosphorus and Life on a Water World

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  • Environmental Science
    Geophysical Research Letters
  • 2022
On Earth, the major mechanism for providing the vital limiting nutrient phosphorus necessary to fuel biological productivity and the long arc of evolution is weathering of exposed continental rocks.

Marine phosphate availability and the chemical origins of life on Earth

The solubility of Fe(II)-phosphate in synthetic seawater is determined as a function of pH and ionic strength, integrated into a thermodynamic model that predicts phosphate concentrations across a range of aquatic conditions, and validated against modern anoxic sediment pore waters.

Geologic controls on phytoplankton elemental composition.

  • S. SharoniI. Halevy
  • Environmental Science, Geography
    Proceedings of the National Academy of Sciences of the United States of America
  • 2022
Planktonic organic matter forms the base of the marine food web, and its nutrient content (C:N:Porg) governs material and energy fluxes in the ocean. Over Earth history, C:N:Porg had a crucial role

Geologic controls on phytoplankton elemental composition

The nutrient content of phytoplankton has increased over the last 550 million y, driven by various Phanerozoic events including the middle to late Paleozoic expansion of land plants and the Triassic breakup of the supercontinent Pangaea, which increased continental weatherability and the fluxes of weathering-derived phosphate to the oceans.

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