Possible nitrogen fertilization of the early Earth Ocean by microbial continental ecosystems

Christophe Thomazo, Estelle Couradeau, Ferran Garcia-Pichel

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

While significant efforts have been invested in reconstructing the early evolution of the Earth's atmosphere-ocean-biosphere biogeochemical nitrogen cycle, the potential role of an early continental contribution by a terrestrial, microbial phototrophic biosphere has been largely overlooked. By transposing to the Archean nitrogen fluxes of modern topsoil communities known as biological soil crusts (terrestrial analogs of microbial mats), whose ancestors might have existed as far back as 3.2 Ga ago, we show that they could have impacted the evolution of the nitrogen cycle early on. We calculate that the net output of inorganic nitrogen reaching the Precambrian hydrogeological system could have been of the same order of magnitude as that of modern continents for a range of inhabited area as small as a few percent of that of present day continents. This contradicts the assumption that before the Great Oxidation Event, marine and continental biogeochemical nitrogen cycles were disconnected.

Original languageEnglish (US)
Article number2530
JournalNature Communications
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2018

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Nitrogen Cycle
fertilization
ecosystems
Fertilization
Oceans and Seas
Ecosystems
Ecosystem
oceans
Nitrogen
Earth (planet)
nitrogen
biosphere
continents
cycles
Atmosphere
Soil
Earth atmosphere
crusts
soils
analogs

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Possible nitrogen fertilization of the early Earth Ocean by microbial continental ecosystems. / Thomazo, Christophe; Couradeau, Estelle; Garcia-Pichel, Ferran.

In: Nature Communications, Vol. 9, No. 1, 2530, 01.12.2018.

Research output: Contribution to journalArticle

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