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Dust inputs and bacteria influence dissolved organic matter in clear alpine lakes

Author

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  • N. Mladenov

    (Facultad de Ciencias & Instituto del Agua, Universidad de Granada
    Present address: NSTAAR, University of Colorado, 1560 30th Street, Boulder, Colorado 80302-0450, USA.)

  • R. Sommaruga

    (University of Innsbruck, Institute of Ecology, Laboratory of Aquatic Photobiology and Plankton Ecology, Technikerstr. 25, 6020 Innsbruck, Austria.)

  • R. Morales-Baquero

    (Facultad de Ciencias & Instituto del Agua, Universidad de Granada)

  • I. Laurion

    (Institut National de la Recherche Scientifique, Centre - Eau Terre Environnement, 490, Rue de la Couronne, Québec, G1K 9A9 Canada.)

  • L. Camarero

    (Centre d′Estudis Avançats de Blanes - CSIC, Accés Cala Sant Francesc 14 17300 Blanes Girona, Spain.)

  • M.C. Diéguez

    (Laboratorio de Fotobiología, INIBIOMA-CONICET-UNComa Quintral 1250, 8400 Bariloche, Argentina.)

  • A. Camacho

    (Edificio de Investigacion - Campus de Burjassot, University of Valencia)

  • A. Delgado

    (Instituto Andaluz de Ciencias de la Tierra IACT(CSIC-UGR), Avd. de las Palmeras 4, 18100 Armilla, Granada, Spain.)

  • O. Torres

    (NASA Goddard Space Flight Center)

  • Z. Chen

    (Center for Atmospheric Sciences, Hampton University, 23 Tyler Street, Hampton, Virginia 23668, USA.)

  • M. Felip

    (University of Barcelona, Avgd. Diagonal 645, 08028 Barcelona, Spain.)

  • I. Reche

    (Facultad de Ciencias & Instituto del Agua, Universidad de Granada)

Abstract

Remote lakes are usually unaffected by direct human influence, yet they receive inputs of atmospheric pollutants, dust, and other aerosols, both inorganic and organic. In remote, alpine lakes, these atmospheric inputs may influence the pool of dissolved organic matter, a critical constituent for the biogeochemical functioning of aquatic ecosystems. Here, to assess this influence, we evaluate factors related to aerosol deposition, climate, catchment properties, and microbial constituents in a global dataset of 86 alpine and polar lakes. We show significant latitudinal trends in dissolved organic matter quantity and quality, and uncover new evidence that this geographic pattern is influenced by dust deposition, flux of incident ultraviolet radiation, and bacterial processing. Our results suggest that changes in land use and climate that result in increasing dust flux, ultraviolet radiation, and air temperature may act to shift the optical quality of dissolved organic matter in clear, alpine lakes.

Suggested Citation

  • N. Mladenov & R. Sommaruga & R. Morales-Baquero & I. Laurion & L. Camarero & M.C. Diéguez & A. Camacho & A. Delgado & O. Torres & Z. Chen & M. Felip & I. Reche, 2011. "Dust inputs and bacteria influence dissolved organic matter in clear alpine lakes," Nature Communications, Nature, vol. 2(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:2:y:2011:i:1:d:10.1038_ncomms1411
    DOI: 10.1038/ncomms1411
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    Cited by:

    1. 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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