Holkham National Nature Reserve is England's largest national nature reserve (NNR). It is on the Norfolk coast between Burnham Overy Staithe and Blakeney, and is managed by Natural England with the cooperation of the Holkham Estate. Its 3,900 hectares comprise a wide range of habitats, including grazing marsh, woodland, salt marsh, sand dunes and foreshore. The reserve is part of the North Norfolk Coast Site of Special Scientific Interest, and the larger area is additionally protected through Natura 2000, Special Protection Area (SPA) and Ramsar listings, and is part of both an Area of Outstanding Natural Beauty (AONB) and a World Biosphere Reserve. Holkham NNR is important for its wintering wildfowl, especially pink-footed geese, Eurasian wigeon and brant geese, but it also has breeding waders, and attracts many migrating birds in autumn. A number of scarce invertebrates and plants can be found in the dunes, and the reserve is one of the only two sites in the UK to have an antlion colony.
Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal flat ecosystems are as extensive globally as mangroves, covering at least 127,921 km2 (49,391 sq mi) of the Earth's surface. They are found in sheltered areas such as bays, bayous, lagoons, and estuaries; they are also seen in freshwater lakes and salty lakes alike, wherein many rivers and creeks end. Mudflats may be viewed geologically as exposed layers of bay mud, resulting from deposition of estuarine silts, clays and aquatic animal detritus. Most of the sediment within a mudflat is within the intertidal zone, and thus the flat is submerged and exposed approximately twice daily.
The Dornoch Firth is a firth on the east coast of Highland, in northern Scotland. It forms part of the boundary between Ross and Cromarty, to the south, and Sutherland, to the north. The firth is designated as a national scenic area, one of 40 such areas in Scotland. The national scenic area covers 15,782 ha in total, of which 4,240 ha is the marine area of the firth below low tide. A review of the national scenic areas by Scottish Natural Heritage in 2010 commented:
By comparison with other east coast firths the Dornoch Firth is narrow and sinuous, yet it exhibits within its compass a surprising variety of landscapes. It is enclosed by abrupt rounded granitic hills clad in heather moor and scree, their Gaelic names of cnoc, meall and creag giving the clue to their character. Their lower slopes are frequently wooded, oakwoods being a noticeable feature of the area, but with other deciduous and coniferous species represented in plantations which vary from the policy plantings of Skibo Castle to the pines of the Struie Forest.
Loch Fleet is a sea loch on the east coast of Scotland, located between Golspie and Dornoch. It forms the estuary of the River Fleet, a small spate river that rises in the hills east of Lairg. The loch was designated a National Nature Reserve (NNR) in 1998, and is managed by a partnership between NatureScot, the Scottish Wildlife Trust (SWT) and Sutherland Estates. The NNR extends to 1058 hectares, including the Loch Fleet tidal basin, sand dunes, shingle ridges and the adjacent pine woods, including Balbair Wood and Ferry Wood. The tidal basin of the loch covers over 630 ha, and forms the largest habitat on the NNR.
Chichester Harbour is a 3,733.5-hectare (9,226-acre) biological and geological Site of Special Scientific Interest (SSSI) west of Chichester in Hampshire and West Sussex. The SSSI is part of Chichester Harbour Area of Outstanding Natural Beauty and Solent Maritime Special Area of Conservation. It is also part of Chichester and Langstone Harbours Ramsar site, Special Protection Area and Nature Conservation Review site, Grade I. Part of it is a Geological Conservation Review site and two areas are Local Nature Reserves.
The Ribble and Alt Estuaries lie on the Irish Sea coast of the ceremonial counties of Lancashire and Merseyside in the traditional county of Lancashire in north-west England, and form the boundaries of a number of conservation schemes.
The Ythan Estuary is the tidal component of the Ythan River, emptying into the North Sea 19 kilometres (12 mi) north of Aberdeen, Scotland. The estuary’s tidal action extends a 7 kilometres (4.3 mi) inland and has characteristic widths of between 250 metres (820 ft) and 780 metres (2,560 ft). Besides the tidal channel there are interfaces to the upland dunes including mudflats, sand beaches and shingle flats. Reaches of salt marsh occur, but they are primarily near the Waterside Bridge and the mouth of the Tarty Burn, a small tributary river. Based upon the habitat of the moorland bordering the east of the Ythan River near the mouth, this estuary is the most significant coastal moorland in the northern United Kingdom.
Scolt Head Island is an offshore barrier island between Brancaster and Wells-next-the-Sea in north Norfolk. It is in the parish of Burnham Norton and is accessed by a seasonal ferry from the village of Overy Staithe. The shingle and sand island appears to have originated from a former spit extending from the coast, and longshore drift means that it is slowly moving to the west and inshore.
The coastline of the North Sea has been evolving since the end of the last ice age. The coastline varies from fjords, river estuaries to mudflats.
Stromay is a tidal island off North Uist in the Sound of Harris, Scotland.
Innis Mhòr is a tidal island in the Dornoch Firth of Easter Ross off the east coast of Scotland. It is about 26 hectares in extent and is largely, if not exclusively made up of moving sand dunes. No point on the island is greater than 5 metres (16 ft) above sea level. It has almost certainly never been permanently inhabited. The nearest settlement is Inver to the south, and the town of Tain is 8 kilometres (5.0 mi) to the east.
Cynffig/Kenfig is a Site of Special Scientific Interest which includes Kenfig Sands and its sand dunes near Kenfig in Bridgend County Borough, South Wales. The Kenfig National Nature Reserve is also situated at the site and contains the largest lake in Glamorgan, Kenfig Pool.
Tentsmuir National Nature Reserve (NNR) is located southeast of Tayport in Fife, Scotland. The reserve is made up of three parts, encompassing Morton Lochs, Tentsmuir Point and Tayport Heath, and is managed by NatureScot. The different sections of Tentsmuir NNR were originally designated as separate national nature reserves at different times: the Morton Lochs section was designated in 1952; Tentsmuir Point in 1954; and Tayport Heath in 1988. While these discrete sections are distant from one another, they form part of the extensive dune system at Tentsmuir, and in 2003 SNH combined the three sites to form Tentsmuir National Nature Reserve. The adjoining Tentsmuir Forest is managed by Forestry and Land Scotland and covers most of the land between the three portions of the NNR.
The Inner Tay Estuary is the inner, western part of the Firth of Tay, from the Tay Railway Bridge in the east to the Queen's Bridge over the River Tay in Perth and the bridge in Bridge of Earn on the River Earn. It is one of the largest estuaries in eastern Scotland, and is up to 2.5 km wide. It consists primarily of intertidal sand and mud flats extending seaward to the main channel, most of which are on the northern shore. Landward of these are salt marsh and Phragmites reedbeds. The estuary contains two large islands: Mugdrum Island, opposite Newburgh; and Moncreiffe Island, immediately below Perth. The estuary's narrow form, and the large volume of freshwater from the Rivers Tay and Earn, restrict the influence of saltwater west of the Tayport narrows. Much of the tidal water is freshwater or mildly brackish.
Coul Links is an area of sand dunes in Sutherland, on the east coast of Scotland. It is located between Golspie and Dornoch, lying just to the north of the small village of Embo. The links are considered unusual within Scotland in displaying a complete transition from the foredune to dune system and coastal heathland. They also include habitats such as flooded slacks and seasonal lochs. The links lie on the eastern side of Loch Fleet, and form part of the Loch Fleet Site of Special Scientific Interest (SSSI), the Dornoch Firth and Loch Fleet Special Protection Area (SPA), and the Dornoch Firth and Loch Fleet Ramsar site, but are outwith the Loch Fleet national nature reserve (NNR). Between 1985 and 2010 the Scottish Wildlife Trust (SWT) managed Coul Links under an agreement with the landowner, however the agreement was not renewed when it expired. The SWT continues to be involved in the management of the adjacent Loch Fleet NNR.
The Moray and Nairn Coast is a protected wetland site on the southern shore of the Moray Firth, in the west of Scotland. A total of 2,412 hectares comprises two areas: intertidal flats, saltmarsh and sand dunes at Findhorn Bay and Culbin Bar, and alluvial deposits and woodland of the lower River Spey and Spey Bay. It has been protected as a Ramsar Site since 1997.
