Hollymount is comprised of low-lying, regularly flooded marshland surrounded by drumlins. Swamp carr woodland has developed in the wetland and is characterised by dense, mature Alder Alnus glutinosa and Grey Willow Salix cinerea with Reed Canary-grass Phalaris arundinacea and the Greater Pond-sedge Carex riparia dominating the ground flora.
Oak woodland has also developed on a large drumlin within the site. Over much of this Oak Quercus sp. dominates the canopy with frequent Sycamore Acer pseudoplatanus and Beech Fagus sylvatica and occasional Ash Fraxinus excelsior. Otter Lutra lutra is present on the site and fluctuating water-filled ditches represent the principal sites for Water Violet Hottonia palustris in Northern Ireland.
- ASSI Guidance for Public Bodies/Competent Authorities
- Coastal Areas of Special Scientific Interest
- Conservation Management Plans for Northern Ireland’s Special Areas of Conservation
- European Marine Sites - Marine Special Areas of Conservation and Special Protection Areas
- Management of Special Areas of Conservation (SAC)
- Marine Conservation Zones
- Marine Protected Areas
- Marine Ramsar sites
- Portrush Coastal Zone
- Special Areas of Conservation
- Special Areas of Conservation for Harbour porpoise
- Special Protection Areas