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Table 2 Tukey's multiple comparison post hoc tests for δ13C values in four invertebrate trophic groups collected above and below waterfall barriers to salmon migration on the Clatse and Neekas Rivers, British Columbia. N/A indicates post hoc tests not possible due to low sample sizes.

From: Salmon-derived nitrogen in terrestrial invertebrates from coniferous forests of the Pacific Northwest

   Clatse River
   Below falls Above falls
Trophic grouping (1) Trophic grouping (J) Mean Difference (I-J) Significance Mean Difference (I-J) Significance
Predators Root Feeders 0.77 0.555 1.17 0.004
Predators Omnivores 1.27 0.036 2.14 <0.001
Omnivores Root Feeders -0.49 0.847 -0.92 0.058
   Neekas River
   Below falls Above falls
Trophic grouping (1) Trophic grouping (J) Mean Difference (I-J) Significance Mean Difference (I-J) Significance
Predators Root Feeders 1.80 0.033 0.90 N/A
Predators Omnivores 2.02 <0.001 2.46 <0.001
Omnivores Root Feeders -0.22 0.984 -2.08 N/A