Geoscience Reference
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Species mass-trophic height
Predator mass-prey mass
Predator mass-PPMR
A
B
C
D
E
Ce
Tr
Co
Tr
Tr
1.0
1.0
Tr
Ce
Co
Ce
0.5
Af
Gu
Ce
Br
0.8
0.8
Ta
Br
Ce
Gu
Af
Br
Br
Ce
Gu
Ta
Gu
Co
Ta
Ta
0.4
0.6
0.6
Co
Af
Br
Gu
Ta
Af
Af
Gu
0.4
0.4
Af
Co
0.3
Af
Co
Ta
Gu
Ta
Ce
Co
Br
Ta
Ta
Gu
Ce
Br
Tr
Br
Af
Br
Gu
0.2
0.2
Ta
Ce
Br
C Co
Broadstone Stream
Celtic Sea
Coilaco River
Guampoe River
Trancura River
Tadnoll Brook
Afon Hirnant
Af
Gu
Tr
0.2
Co
Tr
0.0
0.0
Tr
Tr
*
**
*
**
*
Af
Co
Tr
D*
F*
AD
CF
AD
CF
Resolution or grouping aggregations used in comparisons
Figure 4 Resolution comparisons (open boxplots) and grouping comparisons (grey boxplots) of trophic ordering response variables.
The significance level of the Welch two-sample t-test is indicated by stars (*p < 0.05, **p < 0.01). x-axis labels denote the level of
aggregation used (as in Table 1 and Figures 1-3 ). Specific system slopes are represented by colours with filled circles denoting a
significance level of 95%. Black diamonds connected by a dashed line show mean slopes for each response variable compared. For
trophic height, no comparison could be done between different levels of resolution. Abbreviations for the study systems are Broadstone
Stream (Br), Celtic Sea (Ce), Coilaco River (Co), Guampoe River (Gu), Trancura River (Tr), Tadnoll Brook (Ta), Afon Hirnant (Af).
 
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