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Medientyp:
E-Artikel
Titel:
The underestimated importance of belowground carbon input for forest soil animal food webs
Beteiligte:
Pollierer, Melanie M.;
Langel, Reinhard;
Körner, Christian;
Maraun, Mark;
Scheu, Stefan
Erschienen:
Wiley, 2007
Erschienen in:
Ecology Letters, 10 (2007) 8, Seite 729-736
Sprache:
Englisch
DOI:
10.1111/j.1461-0248.2007.01064.x
ISSN:
1461-023X;
1461-0248
Entstehung:
Anmerkungen:
Beschreibung:
AbstractThe present study investigated the relative importance of leaf and root carbon input for soil invertebrates. Experimental plots were established at the Swiss Canopy Crane (SCC) site where the forest canopy was enriched with13C depleted CO2at a target CO2concentration ofc. 540 p.p.m. We exchanged litter between labelled and unlabelled areas resulting in four treatments: (i) leaf litter and roots labelled, (ii) only leaf litter labelled, (iii) only roots labelled and (iv) unlabelled controls. In plots with only13C‐labelled roots most of the soil invertebrates studied were significantly depleted in13C, e.g. earthworms, chilopods, gastropods, diplurans, collembolans, mites and isopods, indicating that these taxa predominantly obtain their carbon from belowground input. In plots with only13C‐labelled leaf litter only three taxa, including, e.g. juvenileGlomerisspp. (Diplopoda), were significantly depleted in13C suggesting that the majority of soil invertebrates obtain its carbon from roots. This is in stark contrast to the view that decomposer food webs are based on litter input from aboveground.