Tab. S1 Affiliation of taxa to trophic groups according to 15N enrichment, separately for wheat and maize plots. Average enrichment in 15N compared to maize
and wheat plants in the respective plots (± SEM; wheat for treatments W+ and W-, maize for treatments M+ and M-) was used to assign species as decomposers
or predators with predators being enriched in 15N by at least 1.6‰ as compared to the respective plant (∆15N), while in decomposers 15N enrichment was less than
1.6‰ (Scheu and Falca 2000). Numbers in parentheses represent number of replicates. In cases of unclear affiliation species were assigned as decomposer or
predators according to literature.
Taxonomic
Group
Collembola
Oribatida
Gamasida
Taxon
Heteromurus nitidus
(Templeton, 1835)
Isotoma viridis
Bourlet, 1839
Lepidocyrtus cyaneus
Tullberg, 1871
Pseudosinella alba
(Packard, 1873)
Protaphorura armata
(Tullberg, 1879)
Willowsia buski
(Lubbock, 1869)
Oppiella nova
(Oudemans, 1902)
Tectocepheus velatus
(Michael, 1880)
Alliphis siculus
(Oudemans, 1905)
Geholaspis mandibularis
(Berlese, 1904)
Hypoaspis aculeifer
(Canestrini, 1884)
Lysigamasus sp.
Karg, 1971
Nenteria breviunguiculata
(Willmann, 1949)
∆15N
in maize plots
3.40 ± 0.33
(3)
1.94 ± 1.05
(8)
2.43 ± 0.91
(3)
4.62 ± 0.98
(3)
1.43 ± 0.87
(8)
7.25 ± 1.85
(4)
0.15 ± 0.39
(2)
-0.99 ± 0.56
(9)
6.54 ± 0.66
(5)
5.13 ± 0.87
(2)
3.49 ± 0.76
(5)
3.72 ± 0.95
(6)
13.85 ± 2.55
(2)
∆15N
in wheat plots
4.89 ± 0.91
(11)
1.41 ± 0.53
(10)
3.29 ± 0.80
(12)
4.78 ± 1.20
(7)
3.45 ± 1.06
(10)
2.55
(1)
-0.82 ± 1.68
(6)
-1.49 ± 1.33
(7)
3.50 ± 0.78
(8)
8.38 ± 0.30
(4)
5.96 ± 0.51
(12)
7.00 ± 0.71
(12)
6.30 ± 1.17
(8)
Trophic group
affiliation
mesofauna
predator
mesofauna
decomposer
mesofauna
predator
mesofauna
predator
mesofauna
decomposers
mesofauna
predator
mesofauna
decomposer
mesofauna
decomposer
mesofauna
predator
mesofauna
predator
mesofauna
predator
mesofauna
predator
mesofauna
predator
literature
Berg et al (2004)
Endlweber et al (2009)
Diplopoda
Symphyla
Chilopoda
Coleoptera
Pergamasus crassipes
(Linnaeus, 1758)
Blaniulus guttulatus
(Fabricius, 1798)
Ophiodesmus albonanus
(Latzel, 1895)
Polydesmus superus
(Latzel, 1884)
Symphylella vulgaris
(Hansen, 1903)
Lamyctes fulvicornis
Meinert, 1868
Necrophloeophagus
longicornis (Leach, 1814)
Bembidion sp.
Latreille, 1802
Paederinae
Lameere, 1900
Trechus sp.
Clairville, 1806
Carabidae larvae
Elateridae larvae
Staphylinidae larvae
Cecidomyiidae larvae
Diptera
Muscidae larvae
Araneae
Meioneta sp.
Hull, 1920
2.70 ± 0.33
(7)
-1.86 ± 0.56
(16)
-1.36 ± 0.47
(8)
-0.38 ± 1.29
(11)
3.72 ± 0.47
(17)
0.80 ± 0.45
(17)
3.75 ± 0.76
(5)
4.42 ± 1.22
(3)
-0.39 ± 1.08
(7)
0.33 ± 0.74
(4)
4.86 ± 1.16
(8)
2.43 ± 0.60
(12)
-2.25 ± 0.55
(9)
-1.19 ± 0.75
(5)
2.46 ± 1.45
(5)
2.38 ± 1.39
(8)
3.81 ± 0.59
(12)
-0.22 ± 0.72
(8)
0.50 ± 0.69
(4)
0.76 ± 0.80
(13)
4.68 ± 0.52
(14)
2.31 ± 0.94
(9)
5.15 ± 0.59
(10)
3.57 ± 0.51
(11)
1.88 ± 0.41
(10)
3.47 ± 0.55
(8)
4.57 ± 0.96
(6)
2.86 ± 0.42
(13)
2.18 ± 0.56
(11)
1.15 ± 1.75
(6)
-1.40 ± 0.81
(6)
3.44 ± 0.64
(12)
mesofauna
predator
macrofauna
decomposer
macrofauna
decomposer
macrofauna
decomposer
macrofauna
predator
macrofauna
predator
macrofauna
predator
macrofauna
predator
macrofauna
macrofauna
predator
macrofauna
predator
macrofauna
predator
macrofauna
Wolters and Ekschmitt (1997)
Assigned as decomposers in maize and
predators in wheat (Dennis et al 1991)
Mitchell (1963)
Assigned as decomposers in maize and
predators in wheat (Dennis et al 1991)
macrofauna
decomposer
macrofauna
macrofauna
decomposer
Assigned as decomposers in wheat and
predators in maize (Frouz 1999)
References
Berg MP, Stoffer M, van den Heuvel HH (2004) Feeding guilds in Collembola based on digestive enzymes. Pedobiologia 48:589–601. doi:
10.1016/j.pedobi.2004.07.006
Dennis P, Wratten SD, Sotherton NW (1991) Mycophagy as a factor limiting predation of aphids (Hemiptera: Aphididae) by staphylinid beetles (Coleoptera:
Staphylinidae) in cereals. Bull Entomol Res 81:25–31.
Endlweber K, Ruess L, Scheu S (2009) Collembola switch diet in presence of plant roots thereby functioning as herbivores. Soil Biol Biochem 41:1151–1154.
doi: 10.1016/j.soilbio.2009.02.022
Frouz J (1999) Use of soil dwelling Diptera (Insecta, Diptera) as bioindicators: a review of ecological requirements and response to disturbance. Agricult Ecosys
Environ 74:167–186. doi: 10.1016/S0167-8809(99)00036-5
Mitchell B (1963) Ecology of tow Carabid beetles, Bembidion lampros (Herbst) and Trechus quadristriatus (Schrank). J Animal Ecol 32:289–299.
Scheu S, Falca M (2000) The soil food web of two beech forests (Fagus sylvatica) of contrasting humus type: stable isotope analysis of a macro- and a
mesofauna-dominated community. Oecologia 123:285–296. doi: 10.1007/s004420051015
Wolters V, Ekschmitt K (1997) Fauna in soil ecosystems: Recycling processes, nutrient fluxes, and agricultural production, 1st edn. Marcel Dekker Inc., New
York