The effect of trampling on a chalk grassland ecosystem.
The area, subjected to pressure by pedestrians and vehicles, was divided into 3 zones according to the intensity of wear. Significant differences in the plant populations occurred between zones. Soil mesofauna numbers were generally reduced by pressure. Soil N, P, pH, C/N ratio, FeII-FeIII and NH4-N/NO3-N balance were unaffected by pressure while compaction increased and soil structure deteriorated with wear.