Table 1

Tukey's multiple comparison post hoc tests for δ15N values in four invertebrate trophic groups collected above and below waterfalls on the Clatse and Neekas Rivers, British Columbia. N/A indicates post hoc tests not possible due to low sample sizes.

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

5.93

<0.001

8.31

<0.001

Predators

Detritivores

5.81

<0.001

4.39

<0.001

Predators

Omnivores

1.28

0.615

1.30

0.123

Omnivores

Root Feeders

4.65

0.002

7.01

<0.001

Omnivores

Detritivores

4.52

0.005

3.09

<0.001

Detritivores

Root Feeders

0.13

1.000

3.92

<0.001

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

8.55

<0.001

5.33

N/A

Predators

Detritivores

6.14

<0.001

5.32

<0.001

Predators

Omnivores

5.84

<0.001

3.34

<0.001

Omnivores

Root Feeders

2.7

0.548

1.99

N/A

Omnivores

Detritivores

0.3

0.999

1.98

0.006

Detritivores

Root Feeders

2.4

0.693

0.01

N/A


Hocking and Reimchen BMC Ecology 2002 2:4   doi:10.1186/1472-6785-2-4

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