Browsing by Subject "Element cycles"

Now showing 1 - 4 of 4
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    Author Correction: Unraveling iron oxides as abiotic catalysts of organic phosphorus recycling in soil and sediment matrices
    (Springer Nature, 2024-08-30) Basinski, Jade J.; Bone, Sharon E.; Klein, Annaleise R.; Thongsomboon, Wiriya; Mitchell, Valerie; Shukle, John T.; Druschel, Gregory K.; Thompson, Aaron; Aristilde, Ludmilla; Earth and Environmental Sciences, School of Science
    Correction to: Nature Communications 10.1038/s41467-024-47931-z, published online 18 July 2024 The original version of this Article contained an error in the Abstract, which was previously incorrectly given as ‘ten-fold’. The correct version states ‘twenty-fold’ in place of ‘ten-fold’. This has been corrected in both the PDF and HTML versions of the Article.
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    Global plant nitrogen use is controlled by temperature
    (Springer Nature, 2024) Wang, Lixin; Earth and Environmental Sciences, School of Science
    Plant nitrogen source in the soil is challenging to track. Compiling the most comprehensive global δ15N dataset, a new study shows the plant use of various available soil nitrogen forms (ammonium, nitrate, and organic nitrogen) is strongly controlled by temperature.
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    The expansion of land plants during the Late Devonian contributed to the marine mass extinction
    (Springer Nature, 2023-11-29) Smart, Matthew S.; Filippelli, Gabriel; Gilhooly, William P., III; Ozaki, Kazumi; Reinhard, Christopher T.; Marshall, John E. A.; Whiteside, Jessica H.; Earth and Environmental Sciences, School of Science
    The evolution and expansion of land plants brought about one of the most dramatic shifts in the history of the Earth system — the birth of modern soils — and likely stimulated massive changes in marine biogeochemistry and climate. Multiple marine extinctions characterized by widespread anoxia, including the Late Devonian mass extinction around 372 million years ago, may have been linked to terrestrial release of the nutrient phosphorus driven by newly-rooted landscapes. Here we use recently published Devonian lake records as variable inputs in an Earth system model of the coupled carbon-nitrogen-phosphorus-oxygen-sulfur biogeochemical cycles to evaluate whether recorded changes to phosphorus fluxes could sustain Devonian marine anoxia sufficient to drive mass extinction. Results show that globally scaled increases in riverine phosphorus export during the Late Devonian mass extinction could have generated widespread marine anoxia, as modeled perturbations in carbon isotope, temperature, oxygen, and carbon dioxide data are generally consistent with the geologic record. Similar results for large scale volcanism suggest the Late Devonian mass extinction was likely multifaceted with both land plants and volcanism as contributing factors.
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    Unraveling iron oxides as abiotic catalysts of organic phosphorus recycling in soil and sediment matrices
    (Springer Nature, 2024-07-18) Basinski, Jade J.; Bone, Sharon E.; Klein, Annaleise R.; Thongsomboon, Wiriya; Mitchell, Valerie; Shukle, John T.; Druschel, Gregory K.; Thompson, Aaron; Aristilde, Ludmilla; Earth and Environmental Sciences, School of Science
    In biogeochemical phosphorus cycling, iron oxide minerals are acknowledged as strong adsorbents of inorganic and organic phosphorus. Dephosphorylation of organic phosphorus is attributed only to biological processes, but iron oxides could also catalyze this reaction. Evidence of this abiotic catalysis has relied on monitoring products in solution, thereby ignoring iron oxides as both catalysts and adsorbents. Here we apply high-resolution mass spectrometry and X-ray absorption spectroscopy to characterize dissolved and particulate phosphorus species, respectively. In soil and sediment samples reacted with ribonucleotides, we uncover the abiotic production of particulate inorganic phosphate associated specifically with iron oxides. Reactions of various organic phosphorus compounds with the different minerals identified in the environmental samples reveal up to ten-fold greater catalytic reactivities with iron oxides than with silicate and aluminosilicate minerals. Importantly, accounting for inorganic phosphate both in solution and mineral-bound, the dephosphorylarion rates of iron oxides were within reported enzymatic rates in soils. Our findings thus imply a missing abiotic axiom for organic phosphorus mineralization in phosphorus cycling.