The Ythan Estuary (Scottish Gaelic: Inbhir Eithein) is the tidal component of the Ythan River, emptying into the

North Sea The North Sea lies between Great Britain, Norway, Denmark, Germany, the Netherlands and Belgium. An epeiric sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian ...

north of

Aberdeen Aberdeen (; sco, Aiberdeen ; gd, Obar Dheathain ; la, Aberdonia) is a city in North East Scotland, and is the third most populous city in the country. Aberdeen is one of Scotland's 32 local government council areas (as Aberdeen City), a ...

, Scotland. The

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...

’s tidal action extends a inland and has characteristic widths of between and . Besides the tidal channel there are interfaces to the upland dunes including

mudflat 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 f ...

s, sand beaches and shingle flats. Reaches of salt

marsh A marsh is a wetland that is dominated by herbaceous rather than woody plant species.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p Marshes can often be found ...

occur, but they are primarily near the Waterside Bridge (crossing of the A975 road) and the mouth of the Tarty Burn, a small tributary river. Based upon the habitat of the

moorland Moorland or moor is a type of habitat found in upland areas in temperate grasslands, savannas, and shrublands and montane grasslands and shrublands biomes, characterised by low-growing vegetation on acidic soils. Moorland, nowadays, generall ...

bordering the east of the Ythan River near the mouth, this estuary is the most significant coastal moorland in the northern

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and ...

. The Ythan Estuary is a designated

Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle ...

(SSSI) and appears as site no. 939 on the

Ramsar list of wetlands of international importance This is the list of Wetlands of International Importance as defined by the Ramsar Convention for the conservation and sustainable use of wetlands, recognizing the fundamental ecological functions of wetlands and their economic, cultural, scientif ...

with Meikle Loch. There are 50 breeding pairs of

common shelduck The common shelduck (''Tadorna tadorna'') is a waterfowl species of the shelduck genus, ''Tadorna''. It is widespread and common in the Euro-Siberian region of the Palearctic, mainly breeding in temperate and wintering in subtropical regions; in ...

s in the estuary, and there is a mixed

tern Terns are seabirds in the family Laridae that have a worldwide distribution and are normally found near the sea, rivers, or wetlands. Terns are treated as a subgroup of the family Laridae which includes gulls and skimmers and consists of e ...

breeding Breeding is sexual reproduction that produces offspring, usually animals or plants. It can only occur between a male and a female animal or plant. Breeding may refer to: * Animal husbandry, through selected specimens such as dogs, horses, and r ...

colony on the east shore from the mouth comprising

Arctic The Arctic ( or ) is a polar regions of Earth, polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada (Yukon, Northwest Territories, Nunavut), Danish Realm (Greenla ...

Sandwich A sandwich is a food typically consisting of vegetables, sliced cheese or meat, placed on or between slices of bread, or more generally any dish wherein bread serves as a container or wrapper for another food type. The sandwich began as a po ...

, little and

common tern The common tern (''Sterna hirundo'') is a seabird in the family Laridae. This bird has a circumpolar distribution, its four subspecies breeding in temperate and subarctic regions of Europe, Asia and North America. It is strongly migrator ...

s. Leisure activities including birdwatching, fishing, canoeing and wildfowling are permitted. There are hides to watch waders (best at low tide), and a wildfowling code of conduct with a voluntary refuge area south of the main bridge over the estuary (A975). Visitors can fish for estuarine species such as flounder for free but are advised not to disturb birds during the breeding season. Game fisher's catching salmon and sea trout is by permit only.

Topography and geometry

North of the estuary mouth extend the Sands of Forvie, the most extensive sand dune formation in Europe, which has been shown to have been a

Stone Age The Stone Age was a broad prehistoric period during which stone was widely used to make tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years, and ended between 4,000 BC and 2,000 BC, with ...

settlement. Some of the dunes north of the estuary rise to a height of about and the lower ones to the south of the estuary rise to about in height. Proceeding from the mouth the estuary inland, there are initially beach sands at the margin, thence

shingle beach A shingle beach (also referred to as rocky beach or pebble beach) is a beach which is armoured with pebbles or small- to medium-sized cobbles (as opposed to fine sand). Typically, the stone composition may grade from characteristic sizes rangi ...

and mudflats. Quickly, by the time of reaching the first roadway bridge crossing about up the estuary, there are mussel beds and marshy areas. At its widest point the Ythan Estuary is approximately wide. The verges of the upper reaches range from extensive mudflats to marsh and fen. Further upstream is a small island known as Geck Island () inaccessible to waders even at low tide, and which is a haven for cormorants. The broader landscape drained by the Ythan near the coast is a generally mild sloping

farm A farm (also called an agricultural holding) is an area of land that is devoted primarily to agricultural processes with the primary objective of producing food and other crops; it is the basic facility in food production. The name is use ...

land known as the Buchan plain, which is virtually devoid of trees. In the

glacial A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate betwe ...

era, the Ythan River at this point would have been a torrent of melt waters streaming down from the

Scottish Highlands The Highlands ( sco, the Hielands; gd, a’ Ghàidhealtachd , 'the place of the Gaels') is a historical region of Scotland. Culturally, the Highlands and the Lowlands diverged from the Late Middle Ages into the modern period, when Lowland S ...

Archaeology

Prehistoric Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The us ...

man had settlements in coastal estuaries along the northeast Scottish coast including the nearby River Don Estuary and the Ythan Estuary. Studies date the lithics recovered at least as early as 7000 BC, with most of the artefacts from the Ythan mouth area deriving from the Sands of Forvie. Most of the large collection of lithics was retrieved in the period 1994-2001 from a deflation surface within this active dune system. The excavations revealed the survival of superimposed land surfaces, whose layers revealed hearth structures and other characteristic

mesolithic The Mesolithic ( Greek: μέσος, ''mesos'' 'middle' + λίθος, ''lithos'' 'stone') or Middle Stone Age is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymo ...

artefacts. Although no

Viking Vikings ; non, víkingr is the modern name given to seafaring people originally from Scandinavia (present-day Denmark, Norway and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded and se ...

artefacts have been recovered here, a few kilometres north along the coast is the only place name associated with

landings, Saint Olaf at

Cruden Bay Cruden Bay is a small village in Scotland, on the north coast of the Bay of Cruden in Aberdeenshire, north of Aberdeen. Just west of Slains Castle, Cruden Bay is said to have been the site of a battle in which the Scots under King Malcolm II d ...

Ecology

There are several distinct

habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

s within the Ythan Estuary complex including marsh, littoral,

estuarine An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environmen ...

lacustrine A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger ...

and dunes. Thus there is an unusual diversity of flora and fauna present in this

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological o ...

. The estuary itself is tidal, located seven kilometres from the

. In the estuary and its verges, the presence of tern colonies is notable, since there are several distinct species that utilize the north banks of the Ythan Estuary, and comprise a percentage of the

pairs of terns in the United Kingdom. In the summer terns can be observed feeding in their characteristic diving patterns approximately 600 to 900 metres inland from the estuary. At the river mouth species of birds include

scaup Scaup is the common name for three species of diving duck: * Greater scaup, or just "scaup", ''Aythya marila'' * Lesser scaup The lesser scaup (''Aythya affinis'') is a small North American diving duck that migrates south as far as Central Ameri ...

long-tailed duck The long-tailed duck (''Clangula hyemalis''), formerly known as oldsquaw, is a medium-sized sea duck that breeds in the tundra and taiga regions of the arctic and winters along the northern coastlines of the Atlantic and Pacific Oceans. It is th ...

red-breasted merganser The red-breasted merganser (''Mergus serrator'') is a diving duck, one of the sawbills. The genus name is a Latin word used by Pliny and other Roman authors to refer to an unspecified waterbird, and ''serrator'' is a sawyer from Latin ''serra' ...

and

velvet scoter The velvet scoter (''Melanitta fusca''), also called a velvet duck,Buczacki, Stefan (2005) ''Fauna Britannica'', Hamlyn, London. is a large sea duck, which breeds over the far north of Europe and the Palearctic west of the Yenisey basin. The gen ...

. In lesser numbers

guillemot Guillemot is the common name for several species of seabird in the Alcidae or auk family (part of the order Charadriiformes). In British use, the term comprises two genera: ''Uria'' and ''Cepphus''. In North America the ''Uria'' species are ...

and

razorbill The razorbill, razor-billed auk, or lesser auk (''Alca torda'') is a colonial seabird and the only extant member of the genus '' Alca'' of the family Alcidae, the auks. It is the closest living relative of the extinct great auk (''Pinguinis im ...

s are occasionally seen at this outlet to the North Sea. Extensive

mussel Mussel () is the common name used for members of several families of bivalve molluscs, from saltwater and freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other edible clams, which ...

beds are found about three kilometres from the estuary mouth, and these provide food for

common eider The common eider (pronounced ) (''Somateria mollissima''), also called St. Cuthbert's duck or Cuddy's duck, is a large ( in body length) sea-duck that is distributed over the northern coasts of Europe, North America and eastern Siberia. It breed ...

(with the occasional

king eider The king eider (pronounced ) (''Somateria spectabilis'') is a large sea duck that breeds along Northern Hemisphere Arctic coasts of northeast Europe, North America and Asia. The birds spend most of the year in coastal marine ecosystems at high la ...

oystercatchers The oystercatchers are a group of waders forming the family Haematopodidae, which has a single genus, ''Haematopus''. They are found on coasts worldwide apart from the polar regions and some tropical regions of Africa and South East Asia. The e ...

and turnstones). On the Forvie Moor element of the Ythan Estuary complex, both

mute Muteness is a speech disorder in which a person lacks the ability to speak. Mute or the Mute may also refer to: Arts and entertainment Film and television * ''Mute'' (2005 film), a short film by Melissa Joan Hart * ''Mute'' (2018 film), a scien ...

and

whooper swan The whooper swan ( /ˈhuːpə(ɹ) swɒn/) (''Cygnus cygnus''), also known as the common swan, pronounced ''hooper swan'', is a large northern hemisphere swan. It is the Eurasian counterpart of the North American trumpeter swan, and the type speci ...

s occur. Meikle Loch is an element of the Ythan Estuary complex and sustains some aquatic

vegetation Vegetation is an assemblage of plant species and the ground cover they provide. It is a general term, without specific reference to particular taxa, life forms, structure, spatial extent, or any other specific botanical or geographic charac ...

, and from November to March is home to many wading birds, ducks and geese.

Conservation status

Based upon Articles 4.1 and 4.2 of the European Union Directive 79/409/EEC this site qualifies as a

Special Protection Area A Special Protection Area (SPA) is a designation under the European Union Directive on the Conservation of Wild Birds. Under the Directive, Member States of the European Union (EU) have a duty to safeguard the habitats of migratory birds and certa ...

(SPA) by supporting biota populations of

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

an importance. The component landforms which are considered elements of the SPA or SSSI are the estuary itself, the dunes to the east known as the Sands of Forvie, Meikle Loch and the adjacent Kippet Hills. The Ythan Estuary SPA code is UK9002221, which designation was conveyed on 30 March 1998. Per Article 4.1, Annex I, the Ythan Estuary complex supports the following significant bird populations during the breeding season: *

Common tern The common tern (''Sterna hirundo'') is a seabird in the family Laridae. This bird has a circumpolar distribution, its four subspecies breeding in temperate and subarctic regions of Europe, Asia and North America. It is strongly migrator ...

''Sterna hirundo'', 265 pairs representing up to 2.2% of the breeding population in

Great Britain Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It ...

. * Little tern ''Sterna albifrons'', 41 pairs representing up to 1.7% of the total breeding population in Great Britain *

Sandwich tern The Sandwich tern (''Thalasseus sandvicensis'') is a tern in the family Laridae. It is very closely related to the lesser crested tern (''T. bengalensis''), Chinese crested tern (''T. bernsteini''), Cabot's tern (''T. acuflavidus''), and ele ...

''Sterna sandvicensis'', 600 pairs representing up to 4.3% of the breeding population in Great Britain The Ythan Estuary also is qualified per Article 4.2 of the EU Directive by sustaining the following winter migratory

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriat ...

population of European significance: *

Pink-footed goose The pink-footed goose (''Anser brachyrhynchus'') is a goose which breeds in eastern Greenland, Iceland and Svalbard. It is migratory, wintering in northwest Europe, especially Ireland, Great Britain, the Netherlands, and western Denmark. The nam ...

''Anser brachyrhynchus'', 7213 individuals representing up to 7.7% of the mean wintering Eastern

Greenland Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland ...

Iceland Iceland ( is, Ísland; ) is a Nordic island country in the North Atlantic Ocean and in the Arctic Ocean. Iceland is the most sparsely populated country in Europe. Iceland's capital and largest city is Reykjavík, which (along with its ...

population

References

External links