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Advancing the use of minirhizotrons in wetlands

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Abstract

Background

Wetlands store a substantial amount of carbon (C) in deep soil organic matter deposits, and play an important role in global fluxes of carbon dioxide and methane. Fine roots (i.e., ephemeral roots that are active in water and nutrient uptake) are recognized as important components of biogeochemical cycles in nutrient-limited wetland ecosystems. However, quantification of fine-root dynamics in wetlands has generally been limited to destructive approaches, possibly because of methodological difficulties associated with the unique environmental, soil, and plant community characteristics of these systems. Non-destructive minirhizotron technology has rarely been used in wetland ecosystems.

Scope

Our goal was to develop a consensus on, and a methodological framework for, the appropriate installation and use of minirhizotron technology in wetland ecosystems. Here, we discuss a number of potential solutions for the challenges associated with the deployment of minirhizotron technology in wetlands, including minirhizotron installation and anchorage, capture and analysis of minirhizotron images, and upscaling of minirhizotron data for analysis of biogeochemical pools and parameterization of land surface models.

Conclusions

The appropriate use of minirhizotron technology to examine relatively understudied fine-root dynamics in wetlands will advance our knowledge of ecosystem C and nutrient cycling in these globally important ecosystems.

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Acknowledgements

This paper was developed from a workshop held at Oak Ridge National Laboratory in October, 2010 to facilitate discussion on minirhizotron use to examine fine-root dynamics in wetlands. The authors do not have a financial interest in the commercial products discussed here. We thank the New Phytologist Trust and the U.S. Department of Energy, Office of Science, Biological and Environmental Research for sponsoring the workshop. We also thank R. Norby and anonymous reviewers for comments that improved the manuscript. Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the United States Department of Energy under contract DE-AC05-00OR22725.

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Authors and Affiliations

  1. Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

    C. M. Iversen & J. Childs

  2. Department of Geography, McGill University, Montreal, QC, Canada

    M. T. Murphy

  3. Center for Conservation Biology, University of California, Riverside, CA, USA

    M. F. Allen

  4. Department of Horticulture, Pennsylvania State University, University Park, PA, USA

    D. M. Eissenstat

  5. Northern Research Station, USDA Forest Service, Houghton, MI, USA

    E. A. Lilleskov

  6. Finnish Forest Research Institute, Parkano, Finland

    T. M. Sarjala

  7. Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK

    V. L. Sloan

  8. Environment and Natural Resources Institute, University of Alaska Anchorage, Anchorage, AK, USA

    P. F. Sullivan

  9. Department of Biological Sciences, University of Alaska Anchorage, Anchorage, AK, USA

    P. F. Sullivan

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  1. C. M. Iversen
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  2. M. T. Murphy
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  3. M. F. Allen
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  4. J. Childs
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  5. D. M. Eissenstat
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  6. E. A. Lilleskov
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  7. T. M. Sarjala
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  8. V. L. Sloan
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  9. P. F. Sullivan
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Correspondence to C. M. Iversen.

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Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.

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Iversen, C.M., Murphy, M.T., Allen, M.F. et al. Advancing the use of minirhizotrons in wetlands. Plant Soil 352, 23–39 (2012). https://doi.org/10.1007/s11104-011-0953-1

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