Table 2 Summary of results from mixed models testing for the effects of neighbourhood type (high- vs low-frequency of Quercus robur), ontogenetic stage (adult trees vs. saplings), their interaction, and the effects of leaf chemical defences (total phenolics, mg g−1 d.w.) and leaf physical traits (proportion of water content and specific leaf area [SLA]) on insect leaf herbivory in Q. robur.

From: Interactive effects of plant neighbourhood and ontogeny on insect herbivory and plant defensive traits

 

Dfnum,den

F

P-value

Frequency

1,19

21.5

<0.001

Ontogeny

1,189

5.59

0.019

Frequency × ontogeny

1,189

5.02

0.026

Total phenolics

1,189

15.8

<0.001

Water content

1,189

1.11

0.293

SLA

1,189

0.56

0.455

  1. Herbivory was estimated as the proportion of leaves damaged by insect herbivores for two randomly chosen low-hanging branches. These data were logit-transformed to achieve normality of residuals. Site and site × neighbourhood type were included as random factors. F-values, degrees of freedom and associated P-values of fixed factors are reported. Significant P-values (P < 0.05) are typed in bold.
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