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By living in permanent burrows and incorporating organic detritus from the soil surface, anecic earthworms contribute to soil heterogeneity, but their impact is still under-studied in natural field conditions. We investigated the effects of the anecic earthworm Lumbricus centralis on fresh carbon (C) incorporation, soil organic matter composition, protists, and nematodes of a Cambisol under grassland. We used plant material labelled with stable isotope tracers to detect fresh C input around earthworm-occupied burrows or around burrows from which the earthworm had been removed. After 50 days, we sampled soil (0--10 cm depth) in concentric layers around the burrows, distinguishing between drilosphere (0--8 mm) and bulk soil (50--75 mm). L. centralis effectively incorporated fresh C into the drilosphere, and this shifted soil organic matter amount and chemistry: total soil sugar content was increased compared to unoccupied drilosphere and bulk soil, and the contribution of plant-derived sugars to soil organic matter was enhanced. Earthworms also shifted the spatial distribution of soil C towards the drilosphere. The total abundance of protists and nematodes was only slightly higher in earthworm-occupied drilosphere, but strong positive effects were found for some protist clades (e.g. Stenamoeba spp.). Additional data for the co-occurring anecic earthworm species Aporrectodea longa showed that it incorporated fresh C less than L. centralis, suggesting that the two species may have different effects on soil C distribution and organic matter quality.
|Tijdschrift||Biology and Fertility of Soils|
|Nummer van het tijdschrift||1|
|Status||Gepubliceerd - 2016|
VingerafdrukDuik in de onderzoeksthema's van 'Organic matter composition and the protist and nematode communities around anecic earthworm burrows'. Samen vormen ze een unieke vingerafdruk.
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EcoFinders: EU - FP7 Ecological Function and Biodiversity Indicators in European Soils
Morrien, E. & van der Putten, W. H.
01/07/2011 → 30/09/2019
Data from: Organic matter composition and the protist and nematode communities around anecic earthworm burrows
Andriuzzi, W. S. (Maker), Ngo, P. (Maker) & Geisen, S. (Maker), DataverseNL, 05 jun. 2016