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Plant and Soil

, Volume 402, Issue 1–2, pp 331–342 | Cite as

Mycotoxin contamination and its regulation by the earthworm species Lumbricus terrestris in presence of other soil fauna in an agroecosystem

  • Friederike Wolfarth
  • Stefan Schrader
  • Elisabeth Oldenburg
  • Joachim Brunotte
Regular Article

Abstract

Background and aims

In 2011 and 2013, mesocosm-studies were conducted in the field to assess the degradation performance of soil fauna (earthworms: Lumbricus terrestris, collembolans: Folsomia candida and nematodes: Aphelenchoides saprophilus) on mycotoxin-contaminated crop residues. The aim of the study was to investigate the potential of anecic earthworms in the regulation of the mycotoxin deoxynivalenol (DON) and whether the degradation capacity is influenced by the presence of collembolans and nematodes.

Methods

After 4 and 8 weeks, DON concentrations in residual straw and in soil samples of all faunal treatments (containing earthworms, collembolans and nematodes in different combination) and the non-faunal control treatments were determined using an ELISA-method.

Results

After 4 weeks, the DON concentration in straw decreased in all treatments: faunal treatments 2011: 97–99 %; 2013: 78–94 %; non faunal treatments 2011: 88 %; 2013: 68 %. After 8 weeks a further decline of DON concentrations was measured in all faunal treatments (2011: 58–91 %; 2013: 50–86 %). DON concentration of the non-faunal treatments increased during the final four weeks. In soil the DON concentration was below quantification limits (<0.037 mg kg−1).

Conclusion

This study revealed L. terrestris as the driver of the degradation process. The presence of collembolans and nematodes did not affect its degradation capacity. Earthworms contribute to a sustainable control of mycotoxins in wheat straw, thus reducing the risk of environmental pollution as an ecosystem service.

Keywords

Soil health Ecosystem services Plant pathogen control Mycotoxin degradation Conservation tillage Functional soil biodiversity 

Notes

Acknowledgments

We thank Prof. Dr. Liliane Ruess and Michael Ackermann (HU Berlin) for providing the mass cultures of A. saprophilus and their valuable advice for the breeding procedure. Furthermore, the excellent technical assistance of Sabine El Sayed, Berthold Ortmeier, Evelin Schummer, Anke Mundt, Sina Wedekind, Marco Hornbostel, Svenja Wiedenroth, Annika Rickmann and Sarah Havertz is gratefully acknowledged. We thank Jan. Bug from the Institute of Physical Geography and Landscape Ecology, University of Hannover for providing the climate data of the field site. The valuable advice of three anonymous reviewers for improving our manuscript is very gratefully acknowledged. The study was supported by the German Federal Environmental Foundation, Deutsche Bundesstiftung Umwelt (DBU), by providing a personal grant to Friederike Wolfarth.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Friederike Wolfarth
    • 1
  • Stefan Schrader
    • 1
  • Elisabeth Oldenburg
    • 2
  • Joachim Brunotte
    • 3
  1. 1.Johann Heinrich von Thünen-Institute (TI) - Federal Research Institute for Rural Areas, Forestry and FisheriesInstitute of BiodiversityBraunschweigGermany
  2. 2.Julius Kühn-Institute (JKI) - Federal Research Institute for Cultivated PlantsInstitute for Plant Protection in Field Crops and GrasslandBraunschweigGermany
  3. 3.Johann Heinrich von Thünen-Institute (TI) - Federal Research Institute for Rural Areas, Forestry and FisheriesInstitute of Agricultural TechnologyBraunschweigGermany

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