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Chemodiversity of dissolved organic matter in lakes driven by climate and hydrology

Author

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  • Anne M. Kellerman

    (Uppsala University)

  • Thorsten Dittmar

    (Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg)

  • Dolly N. Kothawala

    (Uppsala University)

  • Lars J. Tranvik

    (Uppsala University)

Abstract

Despite the small continental coverage of lakes, they are hotspots of carbon cycling, largely due to the processing of terrestrially derived dissolved organic matter (DOM). As DOM is an amalgam of heterogeneous compounds comprising gradients of microbial and physicochemical reactivity, the factors influencing DOM processing at the molecular level and the resulting patterns in DOM composition are not well understood. Here we show, using ultrahigh-resolution mass spectrometry to unambiguously identify 4,032 molecular formulae in 120 lakes across Sweden, that the molecular composition of DOM is shaped by precipitation, water residence time and temperature. Terrestrially derived DOM is selectively lost as residence time increases, with warmer temperatures enhancing the production of nitrogen-containing compounds. Using biodiversity concepts, we show that the molecular diversity of DOM, or chemodiversity, increases with DOM and nutrient concentrations. The observed molecular-level patterns indicate that terrestrially derived DOM will become more prevalent in lakes as climate gets wetter.

Suggested Citation

  • Anne M. Kellerman & Thorsten Dittmar & Dolly N. Kothawala & Lars J. Tranvik, 2014. "Chemodiversity of dissolved organic matter in lakes driven by climate and hydrology," Nature Communications, Nature, vol. 5(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4804
    DOI: 10.1038/ncomms4804
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    Cited by:

    1. Erika C. Freeman & Erik J. S. Emilson & Thorsten Dittmar & Lucas P. P. Braga & Caroline E. Emilson & Tobias Goldhammer & Christine Martineau & Gabriel Singer & Andrew J. Tanentzap, 2024. "Universal microbial reworking of dissolved organic matter along environmental gradients," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Jie Hu & Luyao Kang & Ziliang Li & Xuehui Feng & Caifan Liang & Zan Wu & Wei Zhou & Xuning Liu & Yuanhe Yang & Leiyi Chen, 2023. "Photo-produced aromatic compounds stimulate microbial degradation of dissolved organic carbon in thermokarst lakes," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    3. Eleanor A. Sheridan & Jérémy A. Fonvielle & Samuel Cottingham & Yi Zhang & Thorsten Dittmar & David C. Aldridge & Andrew J. Tanentzap, 2022. "Plastic pollution fosters more microbial growth in lakes than natural organic matter," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    4. Núria Catalán & Carina Rofner & Charles Verpoorter & María Teresa Pérez & Thorsten Dittmar & Lars Tranvik & Ruben Sommaruga & Hannes Peter, 2024. "Treeline displacement may affect lake dissolved organic matter processing at high latitudes and altitudes," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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