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Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
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Related Experiment Video

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Sampling Soils in a Heterogeneous Research Plot
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Soil properties changes earthworm diversity indices in different agro-ecosystem.

Sharanpreet Singh1, Ayushi Sharma2, Kiran Khajuria2

  • 1Department of Botanical & Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India.

BMC Ecology
|May 8, 2020
PubMed
Summary

Earthworm populations are sensitive to soil conditions, with conventional farming negatively impacting diversity. Soil physico-chemical properties directly influence earthworm abundance and distribution in agroecosystems.

Keywords:
AbundanceEarthwormsLand use patternPrincipal component analysisSoil variables

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Area of Science:

  • Ecology
  • Soil Science
  • Zoology

Background:

  • Earthworm communities exhibit high sensitivity to soil physico-chemical properties in cultivated and non-cultivated agroecosystems.
  • Soil property variations influence earthworm population patch formation, enabling species prediction based on site characteristics.

Purpose of the Study:

  • To investigate earthworm diversity, abundance, and distribution across cultivated and non-cultivated agroecosystems.
  • To identify key soil physico-chemical properties affecting earthworm diversity and abundance.

Main Methods:

  • Species identification and enumeration of earthworms in different agroecosystems.
  • Calculation of diversity indices: Shannon-Wiener (H), Margalef (DMg), and Pielou's evenness (E).
  • Principal Component Analysis (PCA) to correlate earthworm distribution with soil physico-chemical parameters (EC, pH, TDS, texture, OC, moisture).

Main Results:

  • Ten earthworm species were identified, with Metaphire posthuma being the most abundant (56.81% occurrence).
  • Diversity indices ranged from 0 to 0.86 (H), 0 to 0.64 (DMg), and 0.78 to 1 (E).
  • PCA revealed significant roles of soil EC, pH, TDS, texture, OC, and moisture in determining earthworm distribution patterns.

Conclusions:

  • Conventional farming negatively impacts soil earthworm diversity and abundance.
  • Soil physico-chemical properties are critical determinants of earthworm abundance and distribution at specific sites.
  • Changes in diversity indices are linked to conventional farming practices, directly affecting earthworm populations.