Impoundment Abwinden-Ästen, Austria (river-km 2136-2119.5): species distribution features and aspects of historical river status.
Janauer, Georg A.; Pall, Karin
In Austria the character of the River Danube is dominated by the alpine-born tributaries, especially the River Inn, by a series of hydro-electric power plants, and by the traffic of large barges, mainly tug-pushed multiple barge units. As a consequence, transparency of the water is low due to the large load of suspended solids and wave action on the rip-rap-lined banks is strong. Under such conditions, a species-rich moss flora has developed predominantly in the upper reach of the Abwinden-Asten impoundment whilst phanerogams are more prevalent in the reach closer to the barrage. However, the plant mass development in this Austrian impoundment is much less than in comparable sections of the upper German reach.