"Developmental Aid" for specific circumstances

Many animal and plant species are capable of settling in the Main Valley, if large sanctuaries were recognized and left to develop in accordance with nature. However, for some “specialized” species it is necessary to recreate natural conditions in order to help them establish a foothold.

 

The natural nesting grounds for Common Terns (Sterna hirundo) are exposed, undisturbed gravel banks along free flowing rivers. Since living conditions like these are not to be found along the Upper Main, attempts have been made to help them breed with the use of nesting rafts. Such rafts are made up of a nesting platform, which is supported by floats. Gravel is applied as a nest-substrate, and sections of clay-pipe and tree stumps serve as hiding spots and shade for the chicks. It is also necessary to erect a fence around the rafts to prevent ducks and swans from occupying the floating islands and driving the terns away.

With the use of nesting platforms raised on trees and wooden masts, large birds such as White Stork (Ciconia ciconia), Red (Milvus milvus) and Black Kite (Milvus migrans) and Osprey (Pandion haliaetus) are encouraged to settle.

Setting up the large bird nesting platform at the quarry lake near Trieb
Large bird nesting platform near Trieb
Nesting raft on the quarry lake in Hochstadt

Animals are not the only ones who need a “jump start”. Plants, such as reeds, also find it difficult to establish a foothold on quarry lakes. On many bodies of water, reed beds are very important for water purification, and also serve as hiding places for fish to escape from hunting Cormorants (Phalacrocorax). Common reeds (Phragmites) are important feeding and breeding areas for many species, and it is therefore intended to establish reed beds throughout many shallow water areas.

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Bernhard Struck

(Landkreis Bamberg)

Bernd Flieger

(Landkreis Lichtenfels)

Andreas Laudensack

(StMUV Bayern)

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