Ecosystem-bedrock interaction changes nutrient compartmentalization during early oxidative weathering

Dragos G. Zaharescu, Carmen I. Burghelea, Katerina Dontsova, Jennifer K. Presler, Edward A. Hunt, Kenneth J. Domanik, Mary K. Amistadi, Shana Sandhaus, Elise N. Munoz, Emily E. Gaddis, Miranda Galey, María O. Vaquera-Ibarra, Maria A. Palacios-Menendez, Ricardo Castrejón-Martinez, Estefanía C. Roldán-Nicolau, Kexin Li, Raina M. Maier, Christopher T. Reinhard, Jon Chorover

Research output: Contribution to journalArticle

Abstract

Ecosystem-bedrock interactions power the biogeochemical cycles of Earth’s shallow crust, supporting life, stimulating substrate transformation, and spurring evolutionary innovation. While oxidative processes have dominated half of terrestrial history, the relative contribution of the biosphere and its chemical fingerprints on Earth’s developing regolith are still poorly constrained. Here, we report results from a two-year incipient weathering experiment. We found that the mass release and compartmentalization of major elements during weathering of granite, rhyolite, schist and basalt was rock-specific and regulated by ecosystem components. A tight interplay between physiological needs of different biota, mineral dissolution rates, and substrate nutrient availability resulted in intricate elemental distribution patterns. Biota accelerated CO2 mineralization over abiotic controls as ecosystem complexity increased, and significantly modified the stoichiometry of mobilized elements. Microbial and fungal components inhibited element leaching (23.4% and 7%), while plants increased leaching and biomass retention by 63.4%. All biota left comparable biosignatures in the dissolved weathering products. Nevertheless, the magnitude and allocation of weathered fractions under abiotic and biotic treatments provide quantitative evidence for the role of major biosphere components in the evolution of upper continental crust, presenting critical information for large-scale biogeochemical models and for the search for stable in situ biosignatures beyond Earth.

Original languageEnglish (US)
Article number15006
JournalScientific reports
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2019

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Biota
Ecosystem
Food
Fungal Structures
Dermatoglyphics
Biomass
Minerals
History

ASJC Scopus subject areas

  • General

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Ecosystem-bedrock interaction changes nutrient compartmentalization during early oxidative weathering. / Zaharescu, Dragos G.; Burghelea, Carmen I.; Dontsova, Katerina; Presler, Jennifer K.; Hunt, Edward A.; Domanik, Kenneth J.; Amistadi, Mary K.; Sandhaus, Shana; Munoz, Elise N.; Gaddis, Emily E.; Galey, Miranda; Vaquera-Ibarra, María O.; Palacios-Menendez, Maria A.; Castrejón-Martinez, Ricardo; Roldán-Nicolau, Estefanía C.; Li, Kexin; Maier, Raina M.; Reinhard, Christopher T.; Chorover, Jon.

In: Scientific reports, Vol. 9, No. 1, 15006, 01.12.2019.

Research output: Contribution to journalArticle

Zaharescu, DG, Burghelea, CI, Dontsova, K, Presler, JK, Hunt, EA, Domanik, KJ, Amistadi, MK, Sandhaus, S, Munoz, EN, Gaddis, EE, Galey, M, Vaquera-Ibarra, MO, Palacios-Menendez, MA, Castrejón-Martinez, R, Roldán-Nicolau, EC, Li, K, Maier, RM, Reinhard, CT & Chorover, J 2019, 'Ecosystem-bedrock interaction changes nutrient compartmentalization during early oxidative weathering', Scientific reports, vol. 9, no. 1, 15006. https://doi.org/10.1038/s41598-019-51274-x
Zaharescu, Dragos G. ; Burghelea, Carmen I. ; Dontsova, Katerina ; Presler, Jennifer K. ; Hunt, Edward A. ; Domanik, Kenneth J. ; Amistadi, Mary K. ; Sandhaus, Shana ; Munoz, Elise N. ; Gaddis, Emily E. ; Galey, Miranda ; Vaquera-Ibarra, María O. ; Palacios-Menendez, Maria A. ; Castrejón-Martinez, Ricardo ; Roldán-Nicolau, Estefanía C. ; Li, Kexin ; Maier, Raina M. ; Reinhard, Christopher T. ; Chorover, Jon. / Ecosystem-bedrock interaction changes nutrient compartmentalization during early oxidative weathering. In: Scientific reports. 2019 ; Vol. 9, No. 1.
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AU - Hunt, Edward A.

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