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Ireland’s Lusitanian heathers - an Erica mackayana perspective

100%

Sheehy Skeffington M.

Ecological Questions

2015

tom 21

Erica mackayana occurs only in western Ireland and N Spain. In Ireland, where it spreads only by cuttings, it has a very disjunct and localised distribution. Erica tetralix, however, is very common and where Erica mackayana occurs, the hybrid E. x stuartii, is frequent, though never more than 1–2 km from Erica mackayana. The restricted distribution in Ireland of parent and hybrid raises questions as to their origin. Like Erica erigena, Erica mackayana may have been introduced from Spain by traders as packing for goods; the remote location of the sites suggests it may even have arrived with smugglers.

Arctostaphylos heath community ecology in the Burren,Western Ireland

63%

Hanrahan S. A., Sheehy Skeffington M.

Ecological Questions

2015

tom 21

Arctostaphylo-Dryasetum is a rare sub-type of Alpine and Boreal Heath which is known to occur only in Ireland on the limestone karst Burren, in County Clare. Relevés were taken across the Burren region and three groups were distinguished: Empetrum nigrum group; Erica cinerea group, Juniperus communis group. Altitude and soil conditions were found to be the main ecological factors responsible for the variation in the data set, especially pH, and the organic and mineral content. Winter grazing appears to maintain this habitat. In some areas Calluna vulgaris has encroached on the rarer plant species cutting trials are underway in an attempt to restore the habitat to good conservation status.

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2 Ecological Questions

2 Sheehy Skeffington M.

1 Hanrahan S. A.

2 2015

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Ireland’s Lusitanian heathers - an Erica mackayana perspective

Arctostaphylos heath community ecology in the Burren,Western Ireland