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Refractory dissolved organic nitrogen accumulation in high-elevation lakes

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  • S.J. Goldberg

    (Scripps Institution of Oceanography
    Present address: School of Ocean, Earth Science, and Technology, University of Hawaii, Manoa, 1950 East West Road, Honolulu, Hawaii 96822, USA)

  • G.I. Ball

    (Scripps Institution of Oceanography
    Present address: Chevron Energy Technology Company, 1500 Louisiana St, Houston, Texas 77002, USA)

  • B.C. Allen

    (Tahoe Environmental Research Center, University of California, Davis)

  • S.G. Schladow

    (Tahoe Environmental Research Center, University of California, Davis
    University of California, Davis)

  • A.J. Simpson

    (Environmental NMR Center and Chemistry Program, University of Toronto at Scarborough)

  • H. Masoom

    (Environmental NMR Center and Chemistry Program, University of Toronto at Scarborough)

  • R. Soong

    (Environmental NMR Center and Chemistry Program, University of Toronto at Scarborough)

  • H.D. Graven

    (Imperial College London, South Kensington Campus)

  • L.I. Aluwihare

    (Scripps Institution of Oceanography)

Abstract

The role of dissolved organic matter (DOM) as either a sink for inorganic nutrients or an additional nutrient source is an often-neglected component of nutrient budgets in aquatic environments. Here, we examined the role of DOM in reactive nitrogen (N) storage in Sierra Nevada (California, USA) lakes where atmospheric deposition of N has shifted the lakes toward seasonal phosphorus (P)-limitation. Nuclear magnetic resonance (NMR) spectroscopy and isotope analyses performed on DOM isolated from Lake Tahoe reveal the accumulation of refractory proteinaceous material with a 100–200-year residence time. In contrast, smaller lakes in the same watershed contain DOM with typical terrestrial characteristics, indicating that proteins in Lake Tahoe are autochthonously produced. These data support the role of DOM as a possible sink for reactive N in these lake ecosystems and identify a potential role for DOM in affecting the inorganic nutrient stoichiometry of these environments.

Suggested Citation

  • S.J. Goldberg & G.I. Ball & B.C. Allen & S.G. Schladow & A.J. Simpson & H. Masoom & R. Soong & H.D. Graven & L.I. Aluwihare, 2015. "Refractory dissolved organic nitrogen accumulation in high-elevation lakes," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7347
    DOI: 10.1038/ncomms7347
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    Cited by:

    1. Ang Hu & Kyoung-Soon Jang & Andrew J. Tanentzap & Wenqian Zhao & Jay T. Lennon & Jinfu Liu & Mingjia Li & James Stegen & Mira Choi & Yahai Lu & Xiaojuan Feng & Jianjun Wang, 2024. "Thermal responses of dissolved organic matter under global change," Nature Communications, Nature, vol. 15(1), pages 1-15, December.
    2. Daniel Graeber & Mark J. McCarthy & Tom Shatwell & Dietrich Borchardt & Erik Jeppesen & Martin Søndergaard & Torben L. Lauridsen & Thomas A. Davidson, 2024. "Consistent stoichiometric long-term relationships between nutrients and chlorophyll-a across shallow lakes," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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