Gilberg Island

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Gilberg Island
Gilberginsel with Biggesee
Gilberginsel with Biggesee
Waters Biggesee
Geographical location 51 ° 5 '59 "  N , 7 ° 52' 30"  E Coordinates: 51 ° 5 '59 "  N , 7 ° 52' 30"  E
Gilberginsel (North Rhine-Westphalia)
Gilberg Island
surface 34 ha
Residents uninhabited

The Gilberginsel is an island in the Biggesee , a reservoir in North Rhine-Westphalia ( Germany ). The uninhabited island was created after the Bigge lake was flooded, when the wooded hilltop was separated from the shore by a narrow expanse of water. The Gilberginsel was designated as a nature reserve (NSG) with a size of 96.45 hectares by the Arnsberg district government in 1983 . This designation was renewed in 2013 by the district council of the district of Olpe with the landscape plan No. 1 Biggetalsperre - Listertalsperre . The Waldenburg nature reserve is partially adjacent to the south .

Geographical location

The Gilberginsel is located in the northern part of the Bigge Lake through which the Bigge flows and which is located in the Ebbegebirge Nature Park . The dam is about 1.5 km north-northeast of the island, the city of Attendorn is about 3.5 km away in this direction.

Numbers and dates

The Gilberginsel has an area of ​​about 0.34 km². Its highest point is 360  m above sea level. NN , which is 52.5 m above sea level with full backlog at 307.5  m above sea level. NN corresponds. The island, together with the surrounding water area and the neighboring shore region, forms a nature reserve of 94 hectares and is therefore the largest of the 15 nature reserves in Attendorn.

fauna and Flora

The Gilberginsel is mostly overgrown with spruce, only a small part with deciduous forest of oak and birch. The conversion of the spruce forest into deciduous forest is a nature conservation measure aimed at. Towards the bank there is a narrow strip that is dominated by cane grass ( plant community Phalaridetum arundinaceae), in places also by the sharp sedge (plant community Caricetum gracilis ). Depending on the water level of the reservoir, a strip of gravel is created on the bank, which is populated by annual plants . On the western shore of the island there is a silicate rock overgrown with lichen and moss.

The island is a feeding and migration biotope for various water birds. A large colony of gray herons and cormorants breed in the spruce forest . The island is the only known breeding area of ​​the black kite in the Olpe district. Because of the birds that breed and rest there, the island is popularly known as the bird island . In order to leave the animals undisturbed, they are not approached by the excursion boats.

See also

literature

Individual evidence

  1. ↑ District of Olpe: Landscape plan No. 1 Biggetalsperre - Listertalsperre. Olpe 2013.
  2. ↑ area according to TIM-online (state survey office NRW)
  3. ↑ a b Highest point and lake level according to geoserver.nrw.de (State Office for Data Processing and Statistics North Rhine-Westphalia)
  4. ↑ NSG size and position within Attendorn according to attendorn.de  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (... New version of the 2020 zoning plan for Attendorn; PDF; 462 kB)@1@ 2Template: Toter Link / www.attendorn.de  
  5. ↑ a b Biotope mapping according to naturschutz-fachinformationssysteme-nrw.de  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. (State Office for Nature, Environment and Consumer Protection NRW)@1@ 2Template: Toter Link / www.naturschutz-fachinformationssysteme-nrw.de  

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