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

  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},
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

  • G. Filippelli
  • 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.



Causes and consequences of mid‐Proterozoic anoxia

  • L. Derry
  • Geology, Environmental Science
  • 2015
Evidence for low pO2 and a ferruginous ocean characterize the mid‐Proterozoic (1.8–0.8 Ga). Considerations of redox sources and sinks imply that generation of O2 via organic carbon (Corg) burial must

The Global Phosphorus Cycle

Phosphorus (P) is a limiting nutrient for terrestrial biological productivity that commonly plays a key role in net carbon uptake in terrestrial ecosystems (Tiessen et al. 1984, Roberts et al. 1985,

Iron Oxide Removal from Soils and Clays by a Dithionite-Citrate System Buffered with Sodium Bicarbonate

The oxidation potential of dithionite (Na2S2O4) increases from 0.37 V to 0.73 V with increase in pH from 6 to 9, because hydroxyl is consumed during oxidation of dithionite. At the same time the

Evolution of the Global Carbon Cycle and Climate Regulation on Earth

The existence of stabilizing feedbacks within Earth's climate system is generally thought to be necessary for the persistence of liquid water and life. Over the course of Earth's history, Earth's

Phosphorus burial in ferruginous SiO2-rich Mesoproterozoic sediments

Persistently low atmospheric oxygen requires that net organic carbon burial was muted through much of Earth’s middle age. In order to achieve global mass balance with respect to O2, recent models

Carbon cycling in low temperature hydrothermal systems: The Dorado Outcrop