The Effects of Grazing on the Balance Between Erica Cinerea L. and Callun Vulgaris (L.) Hull. In Upland Heath, and Their Morphological Responses

Abstract

In control plots Erica maintains dominance over Calluna. Grazing at rates of 50-200 sheep-days per 0.5-acre plot shifts the balance in favor of Calluna. At higher intensities Calluna drops out more rapidly than Erica. Under medium cutting Erica produces a few erect branches, and Calluna shows a spreading response. Under more severe treatment Erica is unchanged but Calluna becomes bushy.