Gilberg Island
Gilberg Island | ||
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Gilberginsel with Biggesee | ||
Waters | Biggesee | |
Geographical location | 51 ° 5 '59 " N , 7 ° 52' 30" E | |
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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
- District of Olpe: Landscape plan No. 1 Biggetalsperre - Listertalsperre. Olpe 2013 Gilberginsel nature reserve pp. 26–27.
Individual evidence
- ↑ District of Olpe: Landscape plan No. 1 Biggetalsperre - Listertalsperre. Olpe 2013.
- ↑ area according to TIM-online (state survey office NRW)
- ↑ a b Highest point and lake level according to geoserver.nrw.de (State Office for Data Processing and Statistics North Rhine-Westphalia)
- ↑ 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)
- ↑ 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)
Web links
- Ruhrverband
- Nature reserve "Gilberginsel" in the specialist information system of the State Office for Nature, Environment and Consumer Protection in North Rhine-Westphalia