Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 456020
Title The drilosphere concept: Fine-scale incorporation of surface residue-derived N and C around natural Lumbricus terrestris burrows
Author(s) Andriuzzi, W.S.; Bolger, T.; Schmidt, O.
Source Soil Biology and Biochemistry 64 (2013). - ISSN 0038-0717 - p. 136 - 138.
Department(s) Soil Biology
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) earthworm burrows - laboratory experiment - ecosystem engineers - nitrogen dynamics - soil - carbon - communities - walls
Abstract Anecic (deep-burrowing) earthworms are important for soil biogeochemical functioning, but the fine-scale spatial range at which they incorporate C and N around their burrows (the drilosphere sensu stricto) needs to be investigated under realistic conditions. We conducted a field experiment to delimit spatially the extent to which soil around natural Lumbricus terrestris burrows is influenced biochemically. We placed plant litter dual-labelled with C-13 and N-15 stable isotope tracers on L terrestris burrow openings and we measured residue-derived C-13 and N-15 in thin concentric layers (0-2, 2-4, 4-8 mm) around burrows with or without a resident earthworm. After 45 days, earthworms were significantly enriched in C-13 and N-15 as a result of feeding on the plant litter. At 0-5 cm soil depth, soil N-15 concentrations were significantly higher around occupied than unoccupied burrows, and they were significantly higher in all burrow layers (including 4-8 mm) than in bulk soil (50-75 mm from burrow). This suggests that biochemical drilosphere effects of anecic earthworms, at least in the uppermost portion of the burrow, extend farther than the 2 mm layer assumed traditionally. (C) 2013 Elsevier Ltd. All rights reserved.
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