Three points along one gradient
A disturbance gradient is only meaningful if the sites differ in disturbance and not in much else. These three were chosen within a short walk of one another, sampled in the same season with the same method and the same effort, so that the differences recorded between them can reasonably be attributed to human pressure on the ground.
Site I — Reference Woodland
The least disturbed point on the gradient: shaded, litter-rich ground with a continuous canopy and little day-to-day human traffic. Sampling here establishes the reference assemblage against which the two disturbed sites are compared.
Site II — Managed Grounds
The intermediate point: regularly mown lawn and ornamental hedge broken by paths and buildings. Vegetation is maintained rather than removed, so flowering plants persist and the site carries both woodland holdovers and open-ground colonisers.
Site III — Roadside & Cleared Margin
The most disturbed point: verges, car-park edges and cleared margins with compacted soil, sparse ruderal cover and constant vehicle and pedestrian movement. Sampling here captures the assemblage that persists under sustained human pressure.