THÈSE - Université de Franche-Comté

Table 3. Correlations between farming practices and T. europaea relative abundance and A.
terrestris population dynamic variables in the parcels at the beginning of an A. terrestris
population cycle.
Farming practices
Maximum Delay
Ploughing ns ns
Yield ns
Cutting 0.31***
_ 0.27**
_ 0.29**
Grazing ns ns
Grazing in spring (spgraz) ns ns
Grazing in summer (sumgraz) ns ns
Grazing in autumn (autgraz) 0.36*** ns
Mineral nitrogen (minen) ns ns
Organic nitrogen (organ) 0.33***
Nitrogen fertilisation (nfertil) 0.33***
_ 0.31***
_ 0.35***
Mineral potassium (k) 0.28** ns
Mineral phosphorus (p) 0.24* ns
Rodenticide (broma) ns ns
Relative abundance of T. europaea
2002 (tesp2) 0.22* ns
2003 (tesp3) ns ns
2004 (tesp4) ns ns
Spearman rank correlations: ns. non significant; *P < 0.15; **P < 0.1; ***P < 0.05
Thèse C. Morilhat 2005 118