Flora and Fauna Changes During Conversion from Conventional to Organic Farming
Table 3.6.
Schematic summary of the combined analyses of the estimated arthropod dry mass in relation to covariates
describing the vegetation. Two significant relationships were found. Significant P-values are given (p < 0.0167
following Bonferroni correction). The percentage of variation explained by the reduced model is given in
brackets.
Factor
Class / Continuous
Skylark prey (60%)
Carabidae and
Staphylinidae (96%)
Year
Class variable
< 0.0001
Crop
Class variable
0.0164
< 0.0001
Year×Crop
Class variable
Cereal biomassa
Covariate
< 0.0001
Cereal biomass×Crop
Covariate
Dicotylodenous weed biomass
Covariate
0.0100
Dicotylodenous weed biomass×Crop
Covariate
Weed+catch crop biomass
Covariate
Weed+catch crop biomass×Crop
Covariate
a All three vegetation covariates were significantly correlated (p < 0.05, Pearson Correlation Coefficients, PROC CORR, SAS/STAT,
SAS Institute 1990b).
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