Ågestasjön ( Swedish for "Lake of Ågesta") is a small

lake A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from ...

Huddinge Municipality Huddinge Municipality () is a municipality in Stockholm County, east central Sweden. Its seat is located in Huddinge (), which is a part of Stockholm urban area. The municipality is, with its approximately 110,000 inhabitants, the second most pop ...

south of

Stockholm Stockholm (; ) is the Capital city, capital and List of urban areas in Sweden by population, most populous city of Sweden, as well as the List of urban areas in the Nordic countries, largest urban area in the Nordic countries. Approximately ...

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

. Ågestasjön forms part of the Tyresån Lake System and, with a

biodiversity Biodiversity is the variability of life, life on Earth. It can be measured on various levels. There is for example genetic variability, species diversity, ecosystem diversity and Phylogenetics, phylogenetic diversity. Diversity is not distribut ...

unique in the Stockholm region, is highly popular among

birdwatchers Birdwatching, or birding, is the observing of birds, either as a recreational activity or as a form of citizen science. A birdwatcher may observe by using their naked eye, by using a visual enhancement device such as binoculars or a telescop ...

and

ornithologists __NOTOC__ This is a list of ornithologists who have articles, in alphabetical order by surname. See also :Ornithologists. A * John Abbot – US * Clinton Gilbert Abbott – US * William Louis Abbott – US * Humayun Abdulali — India * Joseph ...

. The lake also forms part of the

Orlången Nature Reserve Orlången Nature Reserve (''Orlångens naturreservat'') is a nature reserve surrounding Lake Orlången in central Huddinge Municipality, south of Stockholm, Sweden. Description The reserve, founded in 1998, encompasses a total area of 15 square ...

and one of the green wedges stretching into central Stockholm. The lakes receives water from Lake Trehörningen and in its northern end empties into

Magelungen Magelungen () is one of the biggest lakes in Stockholm, Sweden, located between the municipalities of Stockholm and Huddinge. It is considered as of great recreational value and is popular for bathing, yachting, and fishing in summers, and tour s ...

. For a brief history of the area see Trehörningen.

Catchment area

The lake and the wetlands around it was transformed into a bird protection area in 1976, which means the area is inaccessible to the public from April 15 to July 15 and hunting, hunting equipment, and dogs are prohibited all seasons. Most of the area within a radius of 300 metres from the lake is subject to special restrictions. Except for birdwatchers, the lake and its surrounding also attracts open-air lovers who use the area for walking,

tour skating Tour skating is recreational long distance ice skating on natural ice. It is particularly popular in the Netherlands and the Nordic countries. It is becoming more popular in areas of North America such as New England, Southcentral Alaska, and Nov ...

, and

cross-country skiing Cross-country skiing is a form of skiing whereby skiers traverse snow-covered terrain without use of ski lifts or other assistance. Cross-country skiing is widely practiced as a sport and recreational activity; however, some still use it as a m ...

. Due to the restrictions on visiting the lake in summer, and to the considerable amount of aquatic plants, bathing is not possible in the lake. Additionally, motorboats and fishing are not allowed on the lake. The lake is surrounded by agricultural lands and a variety of forests, including precious

deciduous In the fields of horticulture and botany, the term deciduous () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed Leaf, leaves, usually in the autumn; to the shedding of petals, aft ...

forest. Near the lake is a

golf course A golf course is the grounds on which the sport of golf is played. It consists of a series of holes, each consisting of a teeing ground, tee box, a #Fairway and rough, fairway, the #Fairway and rough, rough and other hazard (golf), hazards, and ...

and a

riding school An equestrian facility is created and maintained for the purpose of accommodating, training or competing equids, especially horses. Based on their use, they may be known as a barn, stables, or riding hall and may include commercial operations de ...

. Part of the biodiversity in the area is due to the bait animals kept around the lake.Huddinge Municipality, ''Hitta ditt smultronställe...''

Environmental impact

Ågestasjön receives nutrients and contaminants from both lakes upstream, the

Orlången Orlången is a lake in central Huddinge Municipality, just south of Stockholm, Sweden. Orlången, one of the lakes in the Tyresån Lake System, forms part of the Orlången Nature Reserve.Huddinge Municipality, ''Orlången'', site Catchment area ...

and Trehörningen, and Ågestasjön's proper catchment area which is rich in nutrients. In the northern end of the lake superficial sediments (0–2 cm) contain high levels of

copper Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orang ...

zinc Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic tabl ...

nickel Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slo ...

lead Lead () is a chemical element; it has Chemical symbol, symbol Pb (from Latin ) and atomic number 82. It is a Heavy metal (elements), heavy metal that is density, denser than most common materials. Lead is Mohs scale, soft and Ductility, malleabl ...

cadmium Cadmium is a chemical element; it has chemical symbol, symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12 element, group 12, zinc and mercury (element), mercury. Like z ...

, and

Manganese Manganese is a chemical element; it has Symbol (chemistry), symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese was first isolated in the 1770s. It is a transition m ...

; while the southern part of the lake show high levels of

Chromium Chromium is a chemical element; it has Symbol (chemistry), symbol Cr and atomic number 24. It is the first element in Group 6 element, group 6. It is a steely-grey, Luster (mineralogy), lustrous, hard, and brittle transition metal. Chromium ...

in deeper sediments (20–22 cm). Overall, levels of

heavy metals upright=1.2, Crystals of lead.html" ;"title="osmium, a heavy metal nearly twice as dense as lead">osmium, a heavy metal nearly twice as dense as lead Heavy metals is a controversial and ambiguous term for metallic elements with relatively h ...

are considered moderate.

Flora and fauna

In 1998, a wide range of aquatic plants were documented in the lake:

reed Reed or Reeds may refer to: Science, technology, biology, and medicine * Reed bird (disambiguation) * Reed pen, writing implement in use since ancient times * Reed (plant), one of several tall, grass-like wetland plants of the order Poales * Re ...

, common club-rush, common bulrush, lesser bulrush, yellow iris,

alisma ''Alisma'' is a genus of flowering plants in the family Alismataceae, members of which are commonly known as water-plantains. The genus consists of aquatic plants with leaves either floating or submerged, found in a variety of still water habit ...

, branched bur-reed, water hemlock, marsh calla, water-soldier, yellow water-lily, white water-lily, broad-leaved pondweed, blunt-leaved pondweed, whorled water-milfoil, rigid hornwort, common bladderwort,

pondweed Pondweed refers to many species and genera of aquatic plants and green algae: *''Potamogeton'', a diverse and worldwide genus *''Elodea'', found in North America *''Aponogeton'', in Africa, Asia and Australasia *''Groenlandia'', a genus of aquatic ...

, bog-bean, frogbit, lesser duckweed, greater duckweed, and ivy-leaved duckweed. Common fishes in the lake includes pike, roach,

rudd ''Scardinius'' is a genus of freshwater ray-finned fishes belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related species. The fishes in this genus are commonly called rudds. Locally, the name "rudd" without ...

tench The tench or doctor fish (''Tinca tinca'') is a freshwater, fresh- and brackish water, brackish-water fish of the order Cypriniformes found throughout Eurasia from Western Europe including Great Britain, Britain and Ireland east into Asia as far ...

, bleak, silver bream, carp bream,

crucian carp The crucian carp (''Carassius carassius'') is a medium-sized member of the common carp family Cyprinidae. It occurs widely in northern European regions. Its name derives from the Low German ''karusse'' or ''karutze'', possibly from Medieval Lat ...

perch Perch is a common name for freshwater fish from the genus ''Perca'', which belongs to the family Percidae of the large order Perciformes. The name comes from , meaning the type species of this genus, the European perch (''P. fluviatilis'') ...

, and

ruffe The ruffe (''Gymnocephalus cernua''), also known as the Eurasian ruffe or pope, is a freshwater fish found in temperate regions of Europe and northern Asia. It has been introduced into the Great Lakes of North America as an invasive species ...

. Of these tench and crucian carp represent the majority of biomass in the lake, while roach and perch dominated in numbers. Large fishes dominate in the lake, which is considered as a sign of presence of carnivores. A considerable variation in sizes of roaches indicates the lake is an important breeding locale for this species. In contrast, perches show a small variation in scale, which is a sign of the lake being dominated by a single generation as individuals fail to reach carnivorous adulthood. Some 240 bird species have been reported by the lake, which is an important locale for both resting and breeding species. The lake is dominated by some 500 couples of

black-headed gull The black-headed gull (''Chroicocephalus ridibundus'') is a small gull that breeds in much of the Palearctic in Europe and Asia, and also locally in smaller numbers in coastal eastern Canada. Most of the population is migratory and winters fu ...

s together with

mallard The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa. It has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...

s and

coots Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usually ...

. 5 couples of

great crested grebe The great crested grebe (''Podiceps cristatus'') is a member of the grebe family of water birds. The bird is characterised by its distinctive appearance, featuring striking black, orange-brown, and white plumage, and elaborate courtship displa ...

, 5-10 couples of

teal alt=American teal duck (male), Green-winged teal (male) Teal is a greenish-blue color. Its name comes from that of a bird—the Eurasian teal (''Anas crecca'')—which presents a similarly colored stripe on its head. The word is often used ...

and

goldeneye ''GoldenEye'' is a 1995 spy film, the seventeenth in the List of James Bond films, ''James Bond'' series produced by Eon Productions, and the first to star Pierce Brosnan as the fictional Secret Intelligence Service, MI6 agent James Bond (lit ...

, 5 couples of

tufted duck The tufted duck (or tufted pochard) (''Aythya fuligula'') is a small diving duck with a population of nearly one million birds, found in northern Eurasia. They are partially migratory. The scientific name is derived from Ancient Greek , an unide ...

and

pochard Pochard is a common name used for several species of diving ducks: *Four species in the genus ''Aythya'': ** Common pochard, ''Aythya ferina'' ** Baer's pochard, ''Aythya baeri'' ** Ferruginous pochard, ''Aythya nyroca'' ** Madagascar pochard, ' ...

, a few couples of

moorhen Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus ''Gallinula'', Latin for "little hen." They are close relatives of coots. They are ...

and

water rail The water rail, western water rail or European water rail (''Rallus aquaticus'') is a bird of the rail family which breeds in well-vegetated wetlands across Europe, Asia and North Africa. Northern and eastern populations are migratory, but this ...

, and single couples of

shoveler The shovelers or shovellers are four species of dabbling ducks with long, broad spatula-shaped beaks: * Red shoveler, ''Anas platalea'' * Cape shoveler, ''Anas smithii'' * Australasian shoveler, ''Anas rhynchotis'' * Northern shoveler, ''Ana ...

gadwall The gadwall (''Mareca strepera'') is a common and widespread dabbling duck in the family Anatidae. Taxonomy The gadwall was first described by Carl Linnaeus in his landmark 1758 10th edition of ''Systema Naturae''. DNA studies have shown th ...

garganey The garganey (''Spatula querquedula'') is a small dabbling duck. It breeds in much of Europe and across the Palearctic, but is strictly bird migration, migratory, with the entire population moving to Africa, India (in particular Santragachi), Ban ...

. A presence of

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

dates back to 2004, while regular visitors include

marsh harrier The marsh harriers are bird of prey, birds of prey of the harrier (bird), harrier subfamily. They are medium-sized Bird of prey, raptors and the largest and broadest-winged harriers. Most of them are associated with marshland and dense reedbeds. ...

(2-3 couples),

snipe A snipe is any of about 26 wading bird species in three genera in the family Scolopacidae. They are characterized by a very long, slender bill, eyes placed high on the head, and cryptic/ camouflaging plumage. ''Gallinago'' snipe have a nearly ...

, and

Eurasian woodcock The Eurasian woodcock (''Scolopax rusticola'') is a medium-small wader, wading bird found in temperate and subarctic Palearctic realm, Eurasia. It has Camouflage#Cryptic coloration in nature, cryptic camouflage to suit its woodland habitat, with ...

. Occasionally

Eurasian bittern The Eurasian bittern or great bittern (''Botaurus stellaris'') is a wading bird in the bittern subfamily (Botaurinae) of the heron family Ardeidae. There are two subspecies, the northern race (''B. s. stellaris'') breeding in parts of Europe and ...

and spotted crake are seen by the lake. There are a dozen couples of

northern lapwing The northern lapwing (''Vanellus vanellus''), also known as the peewit or pewit, tuit or tewit, green plover, or (in Ireland and Great Britain) pyewipe or just lapwing, is a bird in the lapwing subfamily. It is common through temperate Palearcti ...

and

eastern yellow wagtail The eastern yellow wagtail (''Motacilla tschutschensis'') is a small passerine in the wagtail family Motacillidae, which also includes the pipits and longclaws. It was formerly usually classified as a subspecies of the western yellow wagtail, ...

, together with couples of

meadow pipit The meadow pipit (''Anthus pratensis'') is a small passerine bird that breeds throughout much of the Palearctic, from south-eastern Greenland and Iceland east to just east of the Ural Mountains in Russia, and south to central France and Romania; ...

whinchat The whinchat (''Saxicola rubetra'') is a small bird migration, migratory passerine bird breeding in Europe and Palearctic, western Asia and wintering in central Africa. At one time considered to be in the thrush family, Turdidae, it is now pla ...

red-backed shrike The red-backed shrike (''Lanius collurio'') is a carnivorous passerine bird and member of the shrike family, Laniidae. Its breeding range stretches from Western Europe east to central Russia. It is migratory and winters in the eastern areas of ...

bearded reedling The bearded reedling (''Panurus biarmicus'') is a small, long-tailed passerine bird found in reed beds near water in the temperate zone of Eurasia. It is frequently known as the bearded tit or the bearded parrotbill, as it historically was beli ...

goshawk Goshawk may refer to several species of birds of prey in the family Accipitridae: Palearctic * Eurasian goshawk, ''Astur gentilis'', often referred to simply as the goshawk, since it is the only goshawk found in much of its range (in Europe and ...

, spotted nutcracker,

Eurasian wryneck The Eurasian wryneck or northern wryneck (''Jynx torquilla'') is a species of wryneck in the woodpecker Family (biology), family. They mainly breed in temperate regions of Europe and Asia. Most populations are bird migration, migratory, winteri ...

European honey buzzard The European honey buzzard (''Pernis apivorus''), also known as the pern or common pern, is a bird of prey in the family Accipitridae. Taxonomy The European honey buzzard was formally described in 1758 by the Swedish naturalist Carl Linnaeus in ...

thrush nightingale The thrush nightingale (''Luscinia luscinia''), also known as the sprosser, is a small passerine bird that was formerly classed as a member of the thrush family Turdidae, but is now more generally considered to be an Old World flycatcher, Muscic ...

long-tailed tit The long-tailed tit (''Aegithalos caudatus''), also named long-tailed bushtit, is a common bird found throughout Europe and the Palearctic. The genus name ''Aegithalos'' was a term used by Aristotle for some European tits, including the long-tail ...

lesser spotted woodpecker The lesser spotted woodpecker (''Dryobates minor'') is a member of the woodpecker family Picidae. It was formerly assigned to the genus '' Dendrocopos'' (sometimes incorrectly spelt as ''Dendrocopus''). Some taxonomic authorities continue to list ...

wood warbler The wood warbler (''Phylloscopus sibilatrix'') is a common and widespread leaf warbler which breeds throughout northern and temperate Europe, and just into the extreme west of Asian Russia in the southern Ural Mountains. This warbler is stro ...

hawfinch The hawfinch (''Coccothraustes coccothraustes'') is a passerine bird in the finch family Fringillidae. It is the only extant species placed in the genus ''Coccothraustes''. Its closest living relatives are the genus '' Eophona'' of East Asia, a ...

, and

Eurasian hobby The Eurasian hobby (''Falco subbuteo'') or just hobby, is a small, slim falcon. It belongs to a group of similar falcons often considered a subgenus '' Hypotriorchis''. Taxonomy and systematics The first formal description of the Eurasian hobby ...

. In the night time

sedge warbler The sedge warbler (''Acrocephalus schoenobaenus'') is an Old World warbler in the genus ''Acrocephalus (bird), Acrocephalus''. It is a medium-sized warbler with a brown, streaked back and wings and a distinct pale supercilium. Sedge warblers are ...

and

reed warbler The ''Acrocephalus'' warblers are small, insectivorous passerine birds belonging to the genus ''Acrocephalus''. Formerly in the paraphyletic Old World warbler assemblage, they are now separated as the namesake of the marsh and tree warbler famil ...

are regularly heard, while grasshopper warbler,

river warbler The river warbler (''Locustella fluviatilis'') is an Old World warbler in the genus ''Locustella''. It breeds in eastern and central Europe, and into the western Palearctic. It is bird migration, migratory, wintering in inland southern Africa, ...

marsh warbler The marsh warbler (''Acrocephalus palustris'') is an Old World warbler currently classified in the family Acrocephalidae. It breeds in temperate Europe and the western Palearctic and winters mainly in southeast Africa. It is notable for incorpor ...

, and

great reed warbler The great reed warbler (''Acrocephalus arundinaceus'') is an insectivorous bird in the family Acrocephalidae. It is a medium-sized passerine bird and the largest of the European warblers. It breeds throughout mainland Europe and the Western Pa ...

are reported now and then.

Osprey The osprey (; ''Pandion haliaetus''), historically known as sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor, reaching more than in length and a wingspan of . It ...

are regularly seen fishing in the lake. Uncountable numbers of resting species are reported by the lake, including various

swan Swans are birds of the genus ''Cygnus'' within the family Anatidae. The swans' closest relatives include the goose, geese and ducks. Swans are grouped with the closely related geese in the subfamily Anserinae where they form the tribe (biology) ...

hawks Hawks are bird of prey, birds of prey of the family Accipitridae. They are very widely distributed and are found on all continents, except Antarctica. The subfamily Accipitrinae includes goshawks, sparrowhawks, sharp-shinned hawks, and othe ...

eagle Eagle is the common name for the golden eagle, bald eagle, and other birds of prey in the family of the Accipitridae. Eagles belong to several groups of Genus, genera, some of which are closely related. True eagles comprise the genus ''Aquila ( ...

cormorant Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) ado ...

s, and sparrows. Both the lakes upstream and downstream suffered of crayfish plague in the late 1970s, which makes it likely Ågestasjön was affected too. As

signal crayfish The signal crayfish (''Pacifastacus leniusculus'') is a species of crayfish indigenous to North America. Introduced to Europe in the 1960s to supplement the North European ''Astacus astacus'' fisheries, which were being damaged by crayfish plague ...

was introduced in the neighbouring lakes recently, it is assumed they are also present in Ågestasjön.

Amphibian Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excl ...

s are represented by

moor frog The moor frog (''Rana arvalis'') is a slim, reddish-brown, semiaquatic amphibian native to Europe and Asia. Moor frogs are known for their ability to freeze solid and survive thawing. The frog makes use of various cryoprotectants i.e. Antifreeze ...

common frog The common frog or grass frog (''Rana temporaria''), also known as the European common frog, European common brown frog, European grass frog, European Holarctic true frog, European pond frog or European brown frog or simply the frog, is a semi ...

true toad A true toad is any member of the family Bufonidae, in the order Anura (frogs and toads). This is the only family of anurans in which all members are known as toads, although some may be called frogs (such as harlequin frogs). The bufonids now ...

, and

smooth newt The smooth newt, European newt, northern smooth newt or common newt (''Lissotriton vulgaris'') is a species of newt. It is widespread in Europe and parts of Asia, and has been introduced species, introduced into Australia. Individuals are brown ...

. There are several

bat Bats are flying mammals of the order Chiroptera (). With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most birds, flying with their very long spread-out ...

s present by the lake:

northern bat The northern bat (''Eptesicus nilssonii'') is the most abundant species of bat in northern Eurasia occurring from France to Hokkaidō and south to Kazakhstan. Description The northern bat is dark brown or black with some gold touched at the tip ...

Daubenton's bat Daubenton's bat or Daubenton's myotis (''Myotis daubentonii'') is a Eurasian bat with rather short ears. It occurs across Eurasia, from Ireland in the west to Hokkaido in the east, and is believed to be increasing its numbers in many areas of it ...

common noctule The common noctule (''Nyctalus noctula'') is a species of Insectivore, insectivorous bat common throughout Europe, Asia, and North Africa. Description The common noctule's short fur is dark brown after moulting in June (males) or July/August (f ...

, and

whiskered bat The whiskered bat (''Myotis mystacinus'') is a small European bat with long fur. Although uncommon, ''M. mystacinus'' is often found around human habitation and around water; it is similar to Brandt's bat (''Myotis brandtii''), from which it wa ...

Otter Otters are carnivorous mammals in the subfamily Lutrinae. The 13 extant otter species are all semiaquatic, aquatic, or marine. Lutrinae is a branch of the Mustelidae family, which includes weasels, badgers, mink, and wolverines, among ...

s were present in the lake until the 1960s and were spotted nearby in 2003.

Notes

References

* * *

External links

* (An introduction to nature reserves in Huddinge Municipality.) {{DEFAULTSORT:Agestasjon Geography of Stockholm Lakes of Stockholm County