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Table 1  F- and p-values of linear mixed-effects models on variations in δ15N and δ13C signatures of macrofauna taxa/species with season (April, July, October) and salt marsh zone (upper salt marsh, lower salt marsh) on the island of Spiekeroog in 2019

From: Trophic structure and origin of resources of soil macrofauna in the salt marsh of the Wadden Sea: a stable isotope (15N, 13C) study

Species n Zone (Z) Season (S) Z × S
15N 13C 15N 13C 15N 13C
F p F p F p F p F p F p
Talitrus saltator 15 26.19 0.004 2.40 0.156 10.76 0.019 1.23 0.336 0.53 0.620 1.71 0.235
Ochthebius dilatatus 16 61.01 0.001 7.73 0.003 7.47 0.039 1.55 0.269 1.05 0.426 7.84 0.013
Dicheirotrichus gustavii 10 9.22 0.075 37.44 0.001 9.85 0.021 8.97 0.024 4.95 0.069 0.06 0.819
Chalcid wasps 6 Only LSM 11.19 0.075 0.95 0.384 N/A
Staphylinidae larvae 7 10.99 0.015 2.64 0.275
Amischa spp. 9 Only USM 0.41 0.705 27.33 0.030
  1. ‘n’ number of replicates, N/A not analysed
  2. Bold values indicate p = < 0.05