Ågestasjön
Ågestasjön | |
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Huddinge | |
References | [1][2] |
Ågestasjön (Swedish for "Lake of Ågesta") is a small lake in Huddinge Municipality south of Stockholm, Sweden.
Ågestasjön forms part of the
The lakes receives water from Lake Trehörningen and in its northern end empties into Magelungen. 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.[2]
Except for birdwatchers, the lake and its surrounding also attracts open-air lovers who use the area for walking, tour skating, and cross-country skiing. 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.[2]
The lake is surrounded by agricultural lands and a variety of forests, including precious
Environmental impact
Ågestasjön receives nutrients and contaminants from both lakes upstream, the Orlången 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, zinc, nickel, lead, cadmium, and Manganese; while the southern part of the lake show high levels of Chromium in deeper sediments (20–22 cm). Overall, levels of heavy metals are considered moderate.[2]
Flora and fauna
In 1998, a wide range of aquatic plants were documented in the lake: reed, common club-rush, common bulrush, lesser bulrush, yellow iris, alisma, 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, bog-bean, frogbit, lesser duckweed, greater duckweed, and ivy-leaved duckweed.[2]
Common fishes in the lake includes
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 gulls together with mallards and coots. 5 couples of
There are a dozen couples of
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 was introduced in the neighbouring lakes recently, it is assumed they are also present in Ågestasjön. Amphibians are represented by moor frog, common frog, true toad, and smooth newt. There are several bats present by the lake: northern bat, Daubenton's bat, common noctule, and whiskered bat. Otters were present in the lake until the 1960s and were spotted nearby in 2003.[2]
See also
Notes
References
- "Ågestasjön" (in Swedish). Huddinge Municipality. Retrieved 2008-02-22.
- "Vattenväxter i sjöarna på Södertörn och i angränsande områden samt uppbyggnad av en sjödatabas" (PDF) (in Swedish). Södertörnsekologerna. pp. Appendix 7, p 8. Archived from the original (PDF) on 2007-10-07. Retrieved 2008-02-21.
- "Hitta ditt smultronställe i Huddinge" (in Swedish). Huddinge Municipality. 2007-05-28. Retrieved 2008-02-22.
External links
- "Nature reserves". Huddinge Municipality. 2007-12-20. Retrieved 2008-02-22. (An introduction to nature reserves in Huddinge Municipality.)