Hohentwiel (nature reserve)

"Hohentwiel" nature reserve IUCN Category IV - Habitat / Species Management Area
location	Hilzingen and Singen , Konstanz district , Baden-Württemberg , Germany
surface	137 ha
Identifier	3,268
WDPA ID	163748
Geographical location	47 ° 46 '  N , 8 ° 49'  E Coordinates: 47 ° 45 '53 "  N , 8 ° 49' 8"  E
Sea level	from 440 m to 686 m ( ø 560 m)
Setup date	March 29, 2004
administration	Regional council Freiburg
particularities	FFH , LSG , LSG , VSG

Nature reserve

The Hohentwiel area is a nature reserve designated by ordinance of March 29, 2004 (NSG number 3.268) in the Baden-Württemberg district of Konstanz in Germany .

location

The approximately 138 hectare large nature reserve "Hohentwiel" is one of the natural area for Hegau . It surrounds the eponymous Hohentwiel in the area of ​​the municipality of Hilzingen and the city of Singen . The area is about one and a half kilometers west of Singen city center, at an altitude of about 440 to 686  m above sea level. NHN .

geology

→ Main article : "Geology" in the article Hohentwiel

Geologically , the Hohentwiel is part of a unit that includes the Hegau and western Lake Constance . The different layers of the environment were created by sedimentation . With the formation of the Alps , volcanic activity began in the region. A remnant of it is the original Hohentwiel, filled with tuff , as a large chimney . On its eastern edge, the phonolite rises up as further volcanic evidence.

Protection purpose

The main protection purpose is “the preservation of the area as a diverse natural space of special character and beauty and as an area of ​​unusually diverse communities.

The protection purpose is also the preservation, maintenance and development of the area

• as a geomorphologically unique volcanic cone mountain of the Hegau with a landscape-defining effect, with its varied mosaic of near-natural forests and bushes, open rubble heaps and rock corridors, dry and semi-arid grassland and grazed grassland communities of great individuality, beauty and scientific value
• as a habitat for numerous endangered and partly endangered animal and plant species, in particular a rich, heat-loving relic flora and fauna

The protection purpose is also the preservation of the species and habitats that are part of the European ecological network Natura 2000 , in particular the lime pioneer lawns, the limestone scree slopes. the limestone grasslands, the ravine and hillside mixed forests (priority habitat type), the natural and near-natural limestone cliffs and their crevice vegetation, as well as species of the bird protection directive. "

Connection with other protected areas

The nature reserve "Hohentwiel" includes the landscape protection areas " Hegau " (3.35.004) and " Hohentwiel " (3.35.016), the FFH area " Westlicher Hegau " (DE-8218-341) and the bird sanctuary " Hohentwiel / Hohenkrähen " (DE-8218-401) designated as contiguous protected areas.

Flora and fauna

flora

The following plant species (selection) recorded in the “Hohentwiel” nature reserve and sorted according to order are “endangered” or “endangered” according to the Red List of Endangered Species :

Shaggy pointed keel

Ordinary pasque flower

Dwarf snail clover

Astern-like (Asterales) Donkey thistle ( Onopordum acanthium ) gold aster ( Galatella linosyris ) Buttercups (Ranunculales) Pasque Flower ( Pulsatilla vulgaris ) Cruciferous (Brassicales) Mountain rockwort ( Alyssum montanum ) rock cress ( Arabis turrita ) Mint family (Lamiales) Spiked speedwell ( Veronica spicata ) germander arum ( Orobanche teucrii ) thyme arum ( Orobanche alba ) grape germander ( Teucrium botrys ) Malpighiales (Malpighiales) Narrow-leaved flax ( Linum tenuifolium ) Clove-like (Caryophyllales) Ear spoon catchwort ( Silene otites ) peony ( Dianthus gratianopolitanus )

Rose-like (rosales) Gray cinquefoil ( Potentilla inclinata ) Raubled Rose ( Rosa jundzillii ) Fabales (Fabales) Hairy fruit pea ( Lathyrus hirsutus ) Shaggy pointed keel ( Oxytropis pilosa ) Dwarf snail clover ( Medicago minima ) Sapindales (Sapindales) Rue ( Ruta graveolens ) Asparagales (Asparagales) Mountain leek ( Allium montanum ) Pale orchid ( Orchis pallens ) Male orchid ( Orchis mascula ) Grape lily ( Anthericum liliago ) Sweet grass (Poales) Bearded grass ( Bothriochloa ischaemum )

fauna

The following animal species (selection) are recorded in the "Hohentwiel" nature reserve:

Ital. Beautiful terrier

Sand lizard

oriole

Quail snail (Candidula unifasciata)

Hymenoptera (Hymenoptera) Andrena polita Lasioglossum lativentre Lasioglossum nigripes Nomada pleurosticta Red snail shell bee ( Osmia andrenoides ) Sand leaf cutter bee ( Megachile maritima ) Grasshoppers (Orthoptera) Blue-winged Wasteland Insect ( Oedipoda caerulescens ) Italian Beautiful Insect ( Calliptamus italicus ) Red-winged Wasteland Insect ( Oedipoda germanica ) Misunderstood grasshopper ( Chorthippus mollis ) Western biting insect ( Platycleis albopunctata ) Reticulated winged (Neuroptera) Spotted- winged ant maiden ( Euroleon nostras ) Dragonfly butterfly-like ( Libelloides coccajus )

Reptiles (reptilia) Slow worm ( Anguis fragilis ) Wall lizard ( Podarcis muralis ) Smooth snake ( Coronella austriaca ) Sand lizard ( Lacerta agilis ) Butterflies (Lepidoptera) Aricia agestis ( Aricia agestis ) Mazarine Blue ( polyommatus semiargus ) Russian Bear ( Callimorpha quadripunctaria ) swallowtail ( Papilio machaon ) Schwefelvögelchen ( Heodes tityrus ) Birds (aves) Berg Laubsänger ( Phylloscopus Bonelli ) whitethroat ( Sylvia communis ) Neuntöter ( lanius collurio ) Oriole ( Oriolus oriolus ) Wendehals ( Jynx torquilla )

Snails (gastropoda)

Quail snail ( Candidula unifasciata )

literature

• District Office for Nature Conservation and Landscape Management Freiburg: Nature reserves in the administrative district of Freiburg . Ed .: Regional Council Freiburg. 2nd Edition. Thorbecke, Ostfildern 2004, ISBN 978-3-7995-5174-8 . Pp. 357-362
• Schwenkel, Hans : Justification of the protection status. Publ. Württ. Landesstelle Naturschutz Landschaftspflege 18: 75-82. Stuttgart 1949 (PDF download, 48 MB)

See also

• List of nature reserves in the district of Konstanz
• List of nature reserves in Baden-Württemberg

Web links

Commons : Hohentwiel (nature reserve)  - collection of images, videos and audio files

• Ordinance, data evaluation sheet and map in the profile of the nature reserve in the protected area directory of the LUBW

Individual evidence

1. ↑ Top25 Viewer [Top. Map 1: 25000 Baden-Württemberg (South)]
2. ↑ Profile of the nature reserve in the LUBW's list of protected areas , section " Protection purpose"
3. ↑ Baden Württemberg's Red Lists ( Memento of the original from December 5, 2015 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.