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  1. Home
  3. Standardized Protocols For Soil Fauna Extraction And A Call For Cross-lab Implementation.
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  3. Standardized Protocols For Soil Fauna Extraction And A Call For Cross-lab Implementation.

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Standardized Protocols for Soil Fauna Extraction and a Call for Cross-Lab Implementation.

Michala Tůmová1, Jing-Zhong Lu2, Maria J I Briones3

  • 1Institute of Soil Biology and Biogeochemistry Biology Centre of the Czech Academy of Sciences České Budějovice Czech Republic.

Ecology and Evolution
|April 23, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Standardized protocols for soil invertebrate extraction are crucial for global biodiversity studies. This research offers harmonized methods for nematodes, enchytraeids, and arthropods, improving data comparability and understanding soil biodiversity trends.

Keywords:
invertebratesmacrofaunamesofaunamicrofaunasoil BON Foodwebsoil biodiversitystandardized methods

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Area of Science:

  • Soil ecology
  • Biodiversity science
  • Invertebrate zoology

Background:

  • Global soil invertebrate diversity assessment is hindered by non-standardized extraction methods across laboratories.
  • Lack of commonly accepted, openly available, and well-documented protocols limits data comparability for soil fauna.
  • Soil and litter invertebrate diversity studies require consistent methodologies for accurate global trend analysis.

Purpose of the Study:

  • To present harmonized, expert-assembled methodologies for extracting key soil and litter invertebrates.
  • To provide practical guidance, including 'expert tips,' to enhance extraction efficiency and reproducibility.
  • To facilitate global comparisons of soil animal data for better biodiversity understanding.

Main Methods:

  • Development of harmonized extraction protocols for nematodes, enchytraeids, microarthropods, and larger invertebrates.
  • Inclusion of visual aids (images, videos) and troubleshooting advice for practical application.
  • Pilot experiments testing nematode wet extraction filter layers and heat extraction efficiency for large soil animals.

    • Main Results:

    • Two layers of milk filters in nematode extraction showed similar efficiency and sample cleanliness compared to one.
    • Heat extraction captured an average of 31.3% of large soil animals (≥3mm) missed during manual sorting.
    • Significant differences in large soil animal extraction efficiency were observed across three distinct laboratories.

    Conclusions:

    • The presented open-access protocols standardize soil invertebrate assessment for ecological studies worldwide.
    • Harmonized methods are essential for accurate global comparisons of soil biodiversity distribution and dynamics.
    • Further standardized testing of extraction efficiency for large soil animals across regions and research groups is recommended.