Ombrotrophic circumstances may occur even in landscapes composed of limestone or other nutrient-rich substrates – for example, in high-rainfall areas, limestone boulders may be capped by acidic ombrotrophic bog vegetation.
Hydrotrophic conditions may also exist in landscapes composed of limestone or other nutrient-abundant substrates – for instance, in regions with high precipitation rates, limestone boulders may be topped by acidic hydrotrophic peatland vegetation.