Assessment of the burrow system of Lumbricus terrestris, Aporrectodea giardi, and Aporrectodea caliginosa using X-ray computed tomography

Jégou, Danielle; Cluzeau, Daniel; Wolf, Hans-Jürgen; Gandon, Y.; Trehen, P.

doi:10.1007/s003740050353

Cited by 38 publications

(44 citation statements)

References 10 publications

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“…Burrows of soil-feeding earthworms like A. caliginosa are more unstable than those of anecic worms that feed on litter (Jegou et al, 1998). The burrow walls are coated with casts, urine and body-surfacesecreted mucus (Edwards and Bohlen, 1996;Gorres et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

The earthworm Aporrectodea caliginosa stimulates abundance and activity of phenoxyalkanoic acid herbicide degraders

Zaprasis

Liu

et al. 2010

The ISME Journal

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2-Methyl-4-chlorophenoxyacetic acid (MCPA) is a widely used phenoxyalkanoic acid (PAA) herbicide. Earthworms represent the dominant macrofauna and enhance microbial activities in many soils. Thus, the effect of the model earthworm Aporrectodea caliginosa (Oligochaeta, Lumbricidae) on microbial MCPA degradation was assessed in soil columns with agricultural soil. MCPA degradation was quicker in soil with earthworms than without earthworms. Quantitative PCR was inhibition-corrected per nucleic acid extract and indicated that copy numbers of tfdA-like and cadA genes (both encoding oxygenases initiating aerobic PAA degradation) in soil with earthworms were up to three and four times higher than without earthworms, respectively. tfdA-like and 16S rRNA gene transcript copy numbers in soil with earthworms were two and six times higher than without earthworms, respectively. Most probable numbers (MPNs) of MCPA degraders approximated 4 × 105 gdw−1 in soil before incubation and in soil treated without earthworms, whereas MPNs of earthworm-treated soils were approximately 150 × higher. The aerobic capacity of soil to degrade MCPA was higher in earthworm-treated soils than in earthworm-untreated soils. Burrow walls and 0–5 cm depth bulk soil displayed higher capacities to degrade MCPA than did soil from 5–10 cm depth bulk soil, expression of tfdA-like genes in burrow walls was five times higher than in bulk soil and MCPA degraders were abundant in burrow walls (MPNs of 5 × 107 gdw−1). The collective data indicate that earthworms stimulate abundance and activity of MCPA degraders endogenous to soil by their burrowing activities and might thus be advantageous for enhancing PAA degradation in soil.

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Section: Discussionmentioning

confidence: 99%

The earthworm Aporrectodea caliginosa stimulates abundance and activity of phenoxyalkanoic acid herbicide degraders

Zaprasis

Liu

et al. 2010

The ISME Journal

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“…More recently, x-ray computed tomography has been used to characterize earthworm burrow morphology (Golabi et al 1995;Daniel et al 1997;Perret et al 1997;Jegou et al 1998;Capowiez et al 1998. A major advantage of this technique, compared to procedures involving excavation, is that the soil is not disturbed during the analysis.…”

Section: Characterization Of Burrow Morphologymentioning

confidence: 99%

Quantifying the Effects of Earthworms on Soil Aggregation and Porosity

Shipitalo¹,

Bayon²

2004

Earthworm Ecology

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“…Epigeic and (epi) anecic species, like Lumbricus rubellus and L. terrestris, burrow less through the soil than do endogeic species, like A. caliginosa (Lavelle and Spain 2001;Jégou et al 1998). It is unclear, however, if these epigeic and (epi)anecic species also have some influence on heavy metal transport and availability in soil.…”

Section: Introductionmentioning

confidence: 99%

The effect of Lumbricus rubellus and Lumbricus terrestris on zinc distribution and availability in artificial soil columns

2005

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This study investigated the impact of epigeic and (epi)anecic earthworms on the distribution and availability of zinc in the soil profile. Experiments were carried out with Lumbricus rubellus and Lumbricus terrestris in perspex columns (Ø 10 cm), filled with 20 to 23 cm non-polluted soil [organic matter 2%, clay 2.9%, pH 6.4 (0.01 M CaCl 2 )], that was covered by a 3-to 5-cm layer of aged zinc-spiked soil (500 mg Zn/kg dry soil) and another 2 cm non-polluted soil on top. After 80 days, columns were sacrificed and sampled in a depth profile. Earthworm casts, deposited on top of the soil, were collected. Each sample was analyzed for total and 0.01 M CaCl 2 -exchangeable zinc concentrations. L. rubellus did not go deeper than 3 cm into the soil and therefore no effect on zinc distribution in the soil could be detected. For L. terrestris, total zinc concentrations in the non-polluted layers were slightly but significantly higher in columns with earthworms, and so were the CaCl 2 -exchangeable zinc concentrations in the polluted layers of these columns. Casts of L. terrestris collected from the soil surface showed higher total zinc concentrations than those from non-polluted soil. Casts were mainly placed on top of the soil. This study showed that these epigeic and (epi) anecic species have only a slight effect on zinc availability, and that deep burrowing species, like L. terrestris, are able to transport polluted soil from deeper layers to the soil surface.

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Assessment of the burrow system of Lumbricus terrestris, Aporrectodea giardi, and Aporrectodea caliginosa using X-ray computed tomography

Cited by 38 publications

References 10 publications

The earthworm Aporrectodea caliginosa stimulates abundance and activity of phenoxyalkanoic acid herbicide degraders

The earthworm Aporrectodea caliginosa stimulates abundance and activity of phenoxyalkanoic acid herbicide degraders

Quantifying the Effects of Earthworms on Soil Aggregation and Porosity

The effect of Lumbricus rubellus and Lumbricus terrestris on zinc distribution and availability in artificial soil columns

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