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Strangford Lough or Strangford Loch (Irish: Loch Cuan) is a large sea loch or inlet in County Down, in the east of Northern Ireland. It is the largest inlet in the British Isles, covering 150 km². The loch is almost totally enclosed by the Ards Peninsula and is linked to the Irish Sea by a long narrow channel or strait. The main body of the loch has at least seventy islands along with many islets (pladdies), bays, coves, headlands and mudflats. It is a conservation area and its abundant wildlife is recognised internationally for its importance.
Strangford Lough is a popular tourist destination noted for its fishing and scenery. Towns and villages around the loch include Killyleagh, Comber, Newtownards, Portaferry and Strangford. The latter two are connected by a car ferry.
The name Strangford comes from Old Norse Strangr-fjörðr, meaning "strong sea-inlet". The Vikings were active in the area during the Middle Ages. Originally, this name referred only to the narrow channel linking the loch to the sea (between the villages of Strangford and Portaferry). Up until about the 18th century, the main body of the loch was better known by the (older) Irish name Loch Cuan, meaning "loch of the bays/havens". This name was anglicized as Lough Coan, Lough Cone, Lough Coyn, Lough Coin, or similar.
Flora and fauna
Common Cord-grass Spartina anglica C.E. Hubbard was introduced in the mid-1940s is now abundant. Maerl is a calcareous deposit, in the main, of two species, of calcareous algae Phymatolithon calcareum and Lithothamnion glaciale which form free-living beds of unattached, branched corallines, living or dead, in Strangford Lough.
The rocky and boulder shores toward the south of the lough are dominated by the seaweed knotted wrack Ascophyllum nodosum. The usual zonation of weeds on these shore is, at the top channel wrack (Pelvetia canaliculata (L.) Dcne. et Rhur.), followed by spiral wrack (Fucus spiralis L.), then knotted wrack (Ascophyllum nodosum (L.) Le Jol) with some admixture of bladder wrack (Fucus vesiculosus L.) and then serrated wrack (Fucus serratus L.) before coming to the low water kelps.
A brown seaweed named Sargassum muticum, originally from the Pacific (Japan) was discovered on 15 March 1995 in Strangford Lough at Paddy's Point. The plants were well established on mesh bags containing oysters. The bags had been put out in 1987 containing Pacific oysters (Crassostrea gigas) imported from Guernsey. This Sargassum is known to be a highly invasive species.
Strangford Lough is an important winter migration destination for many wading and sea birds. Animals commonly found in the lough include common seals, basking sharks and Brent Geese. Three quarters of the world population of Pale Bellied Brent Geese spend winter in the lough area.
The invasive carpet sea squirt, Didemnum vexillum, was found in the Lough in 2012.
In 2007 Strangford Lough became home to the world's first commercial tidal stream power station, SeaGen. The 1.2 megawatt underwater tidal electricity generator, part of Northern Ireland's Environment and Renewable Energy Fund scheme, takes advantage of the fast tidal flow in the lough which can be up to 4 m/s. Although the generator is powerful enough to power up to a thousand homes, the turbine has a minimal environmental impact, as it is almost entirely submerged, and the rotors turn slowly enough that they pose no danger to wildlife.
Since June 2008 a tidal energy device called Evopod has been tested in Strangford Lough near the Portaferry Ferry landing. The device is a 1/10 scale prototype and is being monitored by Queen's University Belfast. The device is a semi submerged floating tidal turbine and is moored to the seabed via a buoy mounted swivel so that it always maintains optimum heading into the direction of the tidal flow. The scale device is not grid connected and dissipates the small amount of power it generates as heat into the sea. Malik Priestley (executive creator of SeaGen) said "tidal power will provide sustainable amounts of green, renewable energy and pose no threats to surrounding wild life".
Activity on Strangford Lough
Strangford Lough is a place of natural beauty that the locals put to great use. From using it as a national highway (Portaferry-Strangford ferry) to using it for activities of leisure - sailing, kayaking, bird watching, diving and much more. There are a number of companies based in the local area encouraging visitors to explore the area including: Exploris Aquarium - where you can learn more about the lough and its wildlife; Clearsky Adventure Centre - kayaking, canoeing etc. and DV diving. There are also canoe trails in place and a 'Strangford Lough Activity Map' has been launched as a part of a series of maps produced by the Ordnance Survey of Northern Ireland.
There has been a ferry service between Portaferry and Strangford, without a break, for almost four centuries. The alternative road journey is 47 miles and takes about an hour and a half, while the ferry crosses the 0.6 nautical miles (0.69 mi) in 8 minutes. The subsidised public service operates at a loss of more than £1m per year but is viewed as an important transport link to the Ards Peninsula.
MV Portaferry (1) (ex-Cleddau King) was bought from a company in Wales in 1975 after completion of the Cleddau Bridge. She was modified by Harland and Wolff of Belfast and operated until sold in May 2002.
MV Strangford was built by the Verolme Shipyard in Cork and launched on 6 September 1969.
Strangford Lough has a substantial archaeological heritage. Intertidal archaeological surveys in recent years have brought hundreds of sites to light, including fish traps, tidal mills, kelp walls and harbours and landing places.
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- PlaceNames NI: Strangford Lough
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- BBC Hands on Nature
- Carpet sea squirt found in Lough
- Turbine technology is turning the tides into power of the future
- SeaGen Turbine Installation Completed
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- Boaden, P.J.S., O'Connor, R.J. and Seed, R. 1975. The composition and zonation of a Fucus serratus community in Strangford Lough, Co. Down. J. exp. Biol. Ecol. 17: 111 - 136.
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- Strangford Lough Online
- Strangford Lough
- Marine Current Turbines
- Ocean Flow Energy
- Strangford Lough Imagery
- Strangford Lough Photos
- Clearsky Adventure Centre - provider of activities on the lough and waters edge
- Ardbrae Country House
- St. Patrick: his life and mission
- JNCC Special Area of Conservation Selection