J. communis is a dioecious evergreen conifer found on basic and acidic soils in a wide range of habitats, including chalk downland, heather moorland, oceanic heaths, rocky slopes and in Betula, Quercus and Pinus woods. Regeneration is inhibited by continuous grazing. 0-975 m (Braeriach, S. Aberdeen).
The decline in S. Britain was already apparent in the 1962 Atlas and since then losses in other areas have become apparent. Burning has largely eliminated it on grouse moors, and the scrub communities in which it regenerates have declined severely due to grazing, burning, succession to woodland and afforestation.
Circumpolar Boreo-temperate element.
PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.
Atlas text references
1999. Juniper in the Lake District National Park. A review of condition and regeneration. Watsonia. 22:261-267. .
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Jalas & Suominen (1973) .
1965. Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.