Introduced species For many years non-native species have settled in the Lake Constance ecosystem and, in some cases, endangered or threatened native flora and fauna. At Lake Constance, non-native species have been increasing annually. Several have been transported from other waterbodies as 'stowaways' on the outside of boats, life jackets, anchor chains or ropes or diving gear.Friedrich W. Strub: Tierische Neuankömmlinge im Bodensee. In: Südkurier dated 20 April 2016. Others have immigrated from the Black Sea or the Danube since the opening of the Main-Danube Canal. Others have been deliberately introduced.Anna-Maria Schneider: Die heimliche Invasion unter Wasser. In: Südkurier date 8 September 2015.
Introduced species For many years non-native species have settled in the Lake Constance ecosystem and, in some cases, endangered or threatened native flora and fauna. At Lake Constance, non-native species have been increasing annually. Several have been transported from other waterbodies as 'stowaways' on the outside of boats, life jackets, anchor chains or ropes or diving gear.Friedrich W. Strub: Tierische Neuankömmlinge im Bodensee. In: Südkurier dated 20 April 2016. Others have immigrated from the Black Sea or the Danube since the opening of the Main-Danube Canal. Others have been deliberately introducedAnna-Maria Schneider: Die heimliche Invasion unter Wasser. In: Südkurier date 8 September 2015.