wetland and estuaries

History of these two ecosystem types, their origin, especially when wetlands were manmade due to weirs. History of their specific uses e.g. in agriculture also because of special vegetation (meadows, pastures); methods to alter wetlands and estuaries for increasing exploitation (e.g. drainage, dikes). Includes also moors and peat bogs and e.g. use of peat. 

This study presents results of 2D- and 3D-reconstructions of the Danube floodplain in Vienna based on historical sources. Prior to channelization, the Danube River was anabranched and consisted of more than 90 % lotic water bodies. Over the long term, erosion and aggradation remained presumably in a dynamic equilibrium. This resulted in permanent regeneration/rejuvenation of the different habitats. River channelization primarily led to a stabilization of the former morphodynamic processes.

Mergenthaler documented the changes to the eastbavarian Danube Landscape over the timespan of around 50 years. He not only took pictures of the river, but of all adjacent biotops like alluvial zones, swamplands and meadows. This documentation contributes to a better understanding of the development of the Danube.

Ditches, old river beds and small ponds comprise important biotopes for fish fauna, providing spawning grounds, as well as habitat and food sources for juvenile fish. These areas are very vulnerable to pressures such as river regulations or the construction of hydroelectric power plants. The article analyses human-induced changes in fish fauna based on the example of the Steyregger Graben, an oxbow lake [alluvial trench] of the Danube in Linz (Upper Austria).

In studies performed in the period  in 1966-67 on the distribution and phenology of ticks on cattle in the delta of the Danube in Rumania, it was found that Boophilus calcaratus [Boophilus annulatus], Hyalomma scupense [Hyalomma detritum], H. marginatum  (plumbeum plumbeum auct), Dermacentor marginatus, D. pîctus, Rhipicephalus sanguíneas and R. bursa  were present. B. calcaratus was the predominant species, forming 71.57% of the total catch of 9, 761 ticks, and was followed by H.

In the present paper the dissemination and the birthplaces for different birds all over Europe and North Africa is considered and reviewed. Special attention is paid to reservations in various countries including protected areas along Danube River catchment in Germany, Austria, Tchechoslovakia, Hungary, Rumania and Bulgaria. The study includes many valuable data and is unique collection for proven information for each separate country.