Portlethen Moss
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The Portlethen Moss is an
acid An acid is a molecule or ion capable of either donating a proton (i.e. Hydron, hydrogen cation, H+), known as a Brønsted–Lowry acid–base theory, Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis ...
ic bog
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, funga, or features of geologic ...
located to the west of the town of
Portlethen Portlethen (; ) is a town located approximately 7 miles south of Aberdeen, Scotland, along the A92 road, A92. The population according to the 2022 census was 8,969 making it the seventh most populous settlement within Aberdeenshire. To the ea ...
,
Aberdeenshire Aberdeenshire (; ) is one of the 32 Subdivisions of Scotland#council areas of Scotland, council areas of Scotland. It takes its name from the Shires of Scotland, historic county of Aberdeenshire (historic), Aberdeenshire, which had substantial ...
in
Scotland Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...
. Like other
mosses Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta ('' sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and ho ...
, this
wetland A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water, either permanently, for years or decades, or only seasonally. Flooding results in oxygen-poor ( anoxic) processes taking place, especially ...
area supports a variety of plant and animal
species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
, even though it has been subject to certain development and
agricultural Agriculture encompasses crop and livestock production, aquaculture, and forestry for food and non-food products. Agriculture was a key factor in the rise of sedentary human civilization, whereby farming of domesticated species created f ...
degradation pressures. For example, the
Great Crested Newt The northern crested newt, great crested newt or warty newt (''Triturus cristatus'') is a newt species native to Great Britain, northern and central continental Europe and parts of Western Siberia. It is a large newt, with females growing up to ...
was found here prior to the expansion of the town of
Portlethen Portlethen (; ) is a town located approximately 7 miles south of Aberdeen, Scotland, along the A92 road, A92. The population according to the 2022 census was 8,969 making it the seventh most populous settlement within Aberdeenshire. To the ea ...
. Many acid-loving vegetative species occur in Portlethen Moss, and the
habitat In ecology, habitat refers to the array of resources, 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 manifestation of its ...
is monitored by the
Scottish Wildlife Trust The Scottish Wildlife Trust () is a registered charity dedicated to conserving the wildlife and natural environment of Scotland. Description The Scottish Wildlife Trust has well over 46,000 members. The Scottish Wildlife Trust acquired its fi ...
. Portlethen Moss is the location of considerable
prehistoric Prehistory, also called pre-literary history, is the period of human history between the first known use of stone tools by hominins  million years ago and the beginning of recorded history with the invention of writing systems. The use o ...
,
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
and seventeenth century history, largely due to a ridge near the bog which was the route of early travellers. By at least the
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
, this
trackway Historic roads (or historic trails in the US and Canada) are paths or routes that have historical importance due to their use over a period of time. Examples exist from prehistoric times until the early 20th century. They include ancient track ...
was more formally constructed with raised stonework and called the
Causey Mounth The Causey Mounth is an ancient drovers' road over the coastal fringe of the Grampian Mountains in Aberdeenshire, Scotland. This route was developed around the 12th century Anno Domini, AD as the main highway between Stonehaven and Aberdeen, a ...
. Without this
drovers' road A drovers' road, drove road, droveway, or simply a drove, is a route for droving livestock on foot from one place to another, such as to marketplace, market or between summer and winter pasture (see transhumance). Many drovers' roads were anci ...
, travel through the Portlethen Moss and several nearby bogs would have been impossible between
Aberdeen Aberdeen ( ; ; ) is a port city in North East Scotland, and is the List of towns and cities in Scotland by population, third most populous Cities of Scotland, Scottish city. Historically, Aberdeen was within the historic county of Aberdeensh ...
and coastal points to the south.


History

Prehistoric man inhabited the Portlethen Moss area as evidenced by well-preserved
Iron Age The Iron Age () is the final epoch of the three historical Metal Ages, after the Chalcolithic and Bronze Age. It has also been considered as the final age of the three-age division starting with prehistory (before recorded history) and progre ...
stone circle A stone circle is a ring of megalithic standing stones. Most are found in Northwestern Europe – especially Stone circles in the British Isles and Brittany – and typically date from the Late Neolithic and Early Bronze Age, with most being ...
s and other excavated artifacts nearby. Only the outcrops and ridge areas would have been habitable, but the desirability of primitive habitation would have been enhanced by proximity to the sea and natural defensive protection of the moss to impede intruders. From
Tacitus Publius Cornelius Tacitus, known simply as Tacitus ( , ; – ), was a Roman historian and politician. Tacitus is widely regarded as one of the greatest Roman historians by modern scholars. Tacitus’ two major historical works, ''Annals'' ( ...
accounts of the Roman general
Agricola Agricola, the Latin word for farmer, may also refer to: People Cognomen or given name :''In chronological order'' * Gnaeus Julius Agricola (40–93), Roman governor of Britannia (AD 77–85) * Sextus Calpurnius Agricola, Roman governor of the m ...
, it is known that the Romans were daunted by Portlethen Moss,
Netherley Red Moss Red Moss is a wetland bog in Aberdeenshire, Scotland, located at the northwestern edge of the village of Netherley (Grid Reference NO 955 856). The moss is designated a national Site of Special Scientific Interest by Scottish Natural Heritage, ...
,
Cookney Moss Cookney is a hamlet in Aberdeenshire, Scotland in proximity to Netherley in the Mounth of the Grampian Highlands. The community is situated on a hilltop approximately northwest of Stonehaven, about northwest of the Bridge of Muchalls, and ab ...
and other local bogs that hindered travel. This is also evidenced by the
Roman Camp ''Castra'' () is a Latin language, Latin term used during the Roman Republic and Roman Empire for a military 'camp', and ''castrum'' () for a 'Fortification, fort'. Either could refer to a building or plot of land, used as a fortified milita ...
of
Raedykes Raedykes is the site of a Roman marching camp located just over northwest of Stonehaven, Aberdeenshire, Scotland. National Grid Reference NO 842902. It is designated as a scheduled monument. A marching camp was a temporary camp used mainly fo ...
having been established immediately south of this cluster of
mosses Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta ('' sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and ho ...
; the Romans, not being able to progress further north, turned inland toward Netherley. The Portlethen Moss is near the Grampian Mountains. The ancient
Causey Mounth The Causey Mounth is an ancient drovers' road over the coastal fringe of the Grampian Mountains in Aberdeenshire, Scotland. This route was developed around the 12th century Anno Domini, AD as the main highway between Stonehaven and Aberdeen, a ...
passage specifically connected the
Bridge of Dee The Bridge of Dee or Brig o Dee is a road bridge over the River Dee in Aberdeen, Scotland. The term is also used for the surrounding area of the city. Dating from 1527,Richards, J.M., ''The National Trust Book of Bridges'', Jonathan Cape, 198 ...
to the town of
Stonehaven Stonehaven ( ) is a town on the northeast coast of Scotland, south of Aberdeen. It had a population of 11,177 at th2022 Census Stonehaven was formerly the county town of Kincardineshire, succeeding the now abandoned town of Kincardine, Aberd ...
. This route was used to access the historic meeting of the
Covenanter Covenanters were members of a 17th-century Scottish religious and political movement, who supported a Presbyterian Church of Scotland and the primacy of its leaders in religious affairs. It originated in disputes with James VI and his son C ...
s at
Muchalls Castle Muchalls Castle stands overlooking the North Sea in the countryside of Kincardine and Mearns, Aberdeenshire, Scotland. The lower course is a well-preserved Romanesque, double-groined 13th-century tower house structure, built by the Frasers o ...
in the year 1638 AD as they opposed the Bishops of Aberdeen. The route was also that taken by
William Keith, 7th Earl Marischal William Keith, 7th Earl Marischal (16141670 or 1671) was a Scottish nobleman and Covenanter. He was the eldest son of William Keith, 6th Earl Marischal. Life During the English Civil War, the 7th Earl Marischal joined James Graham, 1st Marque ...
and
James Graham, 1st Marquess of Montrose James Graham, 1st Marquess of Montrose (1612 – 21 May 1650) was a Scottish nobleman, poet, soldier and later viceroy and captain general of Scotland. Montrose initially joined the Covenanters in the Wars of the Three Kingdoms, but subsequ ...
when they led a
Covenanter Covenanters were members of a 17th-century Scottish religious and political movement, who supported a Presbyterian Church of Scotland and the primacy of its leaders in religious affairs. It originated in disputes with James VI and his son C ...
army of 9000 men in the biggest battle of the
Bishops' Wars The Bishops' Wars were two separate conflicts fought in 1639 and 1640 between Scotland and England, with Scottish Royalists allied to England. They were the first of the Wars of the Three Kingdoms, which also include the First and Second En ...
in 1639 Further to the east of Portlethen Moss lie three original
coast A coast (coastline, shoreline, seashore) is the land next to the sea or the line that forms the boundary between the land and the ocean or a lake. Coasts are influenced by the topography of the surrounding landscape and by aquatic erosion, su ...
al
fishing Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from the natural environment (Freshwater ecosystem, freshwater or Marine ecosystem, marine), but may also be caught from Fish stocking, stocked Body of water, ...
villages: Findon,
Portlethen Portlethen (; ) is a town located approximately 7 miles south of Aberdeen, Scotland, along the A92 road, A92. The population according to the 2022 census was 8,969 making it the seventh most populous settlement within Aberdeenshire. To the ea ...
Village and
Downies Downies is a cliff-top village in Aberdeenshire, Scotland situated on Cammachmore Bay. Historically Downies was a fishing village, until much of the local North Sea fishery collapsed from overfishing; presently Downies is chiefly a residential ...
. In the period from 1960 to 2005, Portlethen has developed as a
dormitory town A commuter town is a populated area that is primarily residential rather than commercial or industrial. Routine travel from home to work and back is called commuting, which is where the term comes from. A commuter town may be called by many o ...
to Aberdeen and a location for
retail Retail is the sale of goods and services to consumers, in contrast to wholesaling, which is the sale to business or institutional customers. A retailer purchases goods in large quantities from manufacturers, directly or through a wholes ...
superstores.


Conservation status

The Portlethen Moss is a recognised nature preserve by the Scottish Wildlife Trust (with designation PLM076) and the Aberdeenshire Council. While
peat Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most ...
cutting was conducted in prehistoric and
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
times, there has been no harvesting of peat in the modern era. There is some ongoing loss of moss habitat from
cattle Cattle (''Bos taurus'') are large, domesticated, bovid ungulates widely kept as livestock. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus '' Bos''. Mature female cattle are calle ...
grazing In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to free range (roam around) and consume wild vegetations in order to feed conversion ratio, convert the otherwise indigestible (by human diges ...
, but the most significant threat is from ongoing land development pressure;Fiona Everingham, ''Portlethen Moss Survey'', Scottish Wildlife Trust, 1994 in fact, half of the Portlethen Moss has been lost to
urban Urban means "related to a city". In that sense, the term may refer to: * Urban area, geographical area distinct from rural areas * Urban culture, the culture of towns and cities Urban may also refer to: General * Urban (name), a list of people ...
(low-density) land development by the town of Portlethen during the period 1985 to 2005. Trampling is considered an insignificant threat due to the small animal or human presence in the existing nature reserve area; furthermore, cattle grazing, while ongoing, is deemed a much lesser current threat than population expansion pressure. Enrichment (addition of grazing animal
manure Manure is organic matter that is used as organic fertilizer in agriculture. Most manure consists of animal feces; other sources include compost and green manure. Manures contribute to the fertility of soil by adding organic matter and nut ...
) is not a major issue due to the low density of animals. As a net result, damage to the primordial moss is considered extensive and widespread by the Scottish Wildlife Trust. The raised bog habitat of the Portlethen Moss is also protected by the
United Kingdom Biodiversity Action Plan The United Kingdom Biodiversity Action Plan (UK BAP) was the UK government's response to the Convention on Biological Diversity, opened for signature at the Rio Earth Summit in 1992. The UK was the first country to produce a national Biodiversi ...
.


Topography and meteorology

Portlethen Moss is considered a
raised bog Raised bogs, also called ombrotrophic bogs, are acidic, wet habitats that are poor in mineral salts and are home to flora and fauna that can cope with such extreme conditions. Raised bogs, unlike fens, are exclusively fed by precipitation (ombro ...
, because its general situation is on higher ground, at the edge of the
Mounth The Mounth ( ) is the broad upland in northeast Scotland between the Highland Boundary and the River Dee, at the eastern end of the Grampians. Name and etymology The name ''Mounth'' is ultimately of Pictish origin. The name is derived from ...
, a coastal mountain spur of the
Grampian Mountains The Grampian Mountains () is one of the three major mountain ranges in Scotland, that together occupy about half of Scotland. The other two ranges are the Northwest Highlands and the Southern Uplands. The Grampian range extends northeast to so ...
overlooking the
North Sea The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Se ...
. There are rock
outcrop An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth and other terrestrial planets. Features Outcrops do not cover the majority of the Earth's land surface because in most p ...
s and strewn
boulder In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In ...
s
relict A relict is a surviving remnant of a natural phenomenon. Biology A relict (or relic) is an organism that at an earlier time was abundant in a large area but now occurs at only one or a few small areas. Geology and geomorphology In geology, a r ...
from the glacial age at this site. Elevations within the Portlethen Moss range from approximately 35 to 60 metres above sea level. Formation of this moss has occurred due to extensive sets of depressions in the underlying rock formations of
Old Red Sandstone Old Red Sandstone, abbreviated ORS, is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the eastern seaboard of North America. It ...
. The entire water composition of the bog thus has been provided by
precipitation In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls from clouds due to gravitational pull. The main forms of precipitation include drizzle, rain, rain and snow mixed ("sleet" in Commonwe ...
with no source of
surface runoff Surface runoff (also known as overland flow or terrestrial runoff) is the unconfined flow of water over the ground surface, in contrast to ''channel runoff'' (or ''stream flow''). It occurs when excess rainwater, stormwater, meltwater, or other ...
, since the topography reduces to lower elevations in every direction. Due to the high winds, moderate precipitation and cool temperatures that generally prevail, conditions are favourable for the formation of an acid bog, since water stagnates, but eventually evaporates with ensuing acidity enhancement of decaying organic matter. There was virtually no
drainage Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess water. The internal drainage of most agricultural soils can prevent severe waterlogging (anaerobic conditions that harm root gro ...
outlet in prehistoric times, and little drainage even in modern times.


Evolution of Portlethen Moss

Many coastal mosses were initiated by the process of
glaciation 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 be ...
, which sheared rock formations to a generally level terrain, while also gouging moderate-sized craters that would pond. This description fits the fundamental situation of Portlethen Moss, where sphagnum would have flourished over millennia of
evaporation Evaporation is a type of vaporization that occurs on the Interface (chemistry), surface of a liquid as it changes into the gas phase. A high concentration of the evaporating substance in the surrounding gas significantly slows down evapora ...
, further intensifying the
soil acidity Soil pH is a measure of the acidity or basicity (alkalinity) of a soil. Soil pH is a key characteristic that can be used to make informative analysis both qualitative and quantitatively regarding soil characteristics. pH is defined as the nega ...
, fueled by organic matter decaying, with little drainage outlet. A layer of
sphagnum ''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as sphagnum moss, also bog moss and quacker moss (although that term is also sometimes used for peat). Accumulations of ''Sphagnum'' can store water, since ...
moss would have developed at the
benthic The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from the Ancient Greek word (), meaning "the depths". ...
level of the bog, and additional sphagnum layers floated in mats atop the bog. At an intermediate level of evolution, thick peat layers formed from the decay and carbonisation of the rotting sphagnum. Generations of ''Carex'' and ''Juncus'' flourished, leading to further decay of these materials and eventual heightening of the organic mass. Finally, secondary vegetation took root in the spongy sphagnum mats, adding greater biomass to the bog. In some cases, the heavily saturated organic layers could rupture, spilling large volumes of mud and organic debris into surrounding fields, thus enabling a bed for further spatial expansion of the entire bog. Ultimately, the colour of the moss waters became blood red from the successive organic decay and stagnation. Only in times associated with cattle grazing and significant human presence (probably the late Iron Age) would this process reverse and the bog reduce in size.


Vegetation

A wide variety of
sphagnum ''Sphagnum'' is a genus of approximately 380 accepted species of mosses, commonly known as sphagnum moss, also bog moss and quacker moss (although that term is also sometimes used for peat). Accumulations of ''Sphagnum'' can store water, since ...
,
sedges The Cyperaceae () are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large; botanists have described some 5,500 known species in about 90 generathe largest being the "true sedges" (genu ...
, rushes and other characteristic bog species inhabit Portlethen Moss. Sometimes, insectivorous plants reside in mosses, since the soils are generally nutrient-poor. The heath also serves as a food source for the area roe deer, while ''Corydalis claviculata'' is an attractive host for numerous
butterfly Butterflies are winged insects from the lepidopteran superfamily Papilionoidea, characterized by large, often brightly coloured wings that often fold together when at rest, and a conspicuous, fluttering flight. The oldest butterfly fossi ...
larvae. Representative plant species found in this nature reserve include:


Relation to other mosses

There are numerous mosses or bog habitats in Scotland, many of them situated also in Aberdeenshire, including the
Cookney Moss Cookney is a hamlet in Aberdeenshire, Scotland in proximity to Netherley in the Mounth of the Grampian Highlands. The community is situated on a hilltop approximately northwest of Stonehaven, about northwest of the Bridge of Muchalls, and ab ...
, Leuchar Moss and Red Moss of Netherley nearby. Many other shires within Scotland that contain mosses such as
Fife Fife ( , ; ; ) is a council areas of Scotland, council area and lieutenancy areas of Scotland, lieutenancy area in Scotland. A peninsula, it is bordered by the Firth of Tay to the north, the North Sea to the east, the Firth of Forth to the s ...
,
Angus Angus may refer to: *Angus, Scotland, a council area of Scotland, and formerly a province, sheriffdom, county and district of Scotland * Angus, Canada, a community in Essa, Ontario Animals * Angus cattle, various breeds of beef cattle Media * ...
,
Morayshire The County of Moray, ( ) or Morayshire, called Elginshire until 1919, is a historic county in Scotland. The county town was Elgin. The historic county ceased to be used for local government purposes in 1975. Since 1996 most of the historic ...
and
Lanarkshire Lanarkshire, also called the County of Lanark (; ), is a Counties of Scotland, historic county, Lieutenancy areas of Scotland, lieutenancy area and registration county in the Central Lowlands and Southern Uplands of Scotland. The county is no l ...
. Some of these are lowland bogs and others, like Portlethen Moss, are raised bogs. There are other similar acidic peat bogs in the northern part of
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
,
Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
and northern
Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
, but in those locations, they are usually called "bogs".


See also

*
Acid rain Acid rain is rain or any other form of Precipitation (meteorology), precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions (low pH). Most water, including drinking water, has a neutral pH that exists b ...
*
Fen A fen is a type of peat-accumulating wetland fed by mineral-rich ground or surface water. It is one of the main types of wetland along with marshes, swamps, and bogs. Bogs and fens, both peat-forming ecosystems, are also known as mires ...
*
Haraldskær Woman The Haraldskær Woman (or Haraldskjaer Woman) is the name given to a bog body of a woman preserved in a bog in Jutland, Denmark, and dating from about 490 BC (pre-Roman Iron Age). Workers found the body in 1835 while excavating peat on the Harald ...
*
Surface runoff Surface runoff (also known as overland flow or terrestrial runoff) is the unconfined flow of water over the ground surface, in contrast to ''channel runoff'' (or ''stream flow''). It occurs when excess rainwater, stormwater, meltwater, or other ...


References


External links


Portlethen Moss: Comparison of historic to modern conditions
{{Kincardine and Mearns, Aberdeenshire places, state = collapsed Bogs of Scotland Environment of Kincardine and Deeside Environmental chemistry Nature reserves in Scotland Sites of Special Scientific Interest in Kincardine and Deeside Protected areas of Aberdeenshire Landforms of Aberdeenshire Portlethen