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Danube River

About Danube: The river and its main tributaries connect many European countries

geographical location of the large river

Danube-TeubnerDanube delta, near Tulcea, Romania, 2005:
Meadows and woodland are surrounding the lakes in the delta.
Danube-TeubnerDanube floodplain, near Vienna, Austria, 2008:
A sign that beavers (Castor fiber) were recently at work here.

The second largest river in Europe, the Danube River, connects a large number of countries along its length: Germany, Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Moldavia, Ukraine and Romania. Other countries connected to the Danube tributaries are Bosnia and Herzegovina, Czech Republic, Slovenia, Montenegro, Switzerland, Italy, Poland, the Republic of Macedonia and Albania. The Danube River, with its tributaries and floodplain systems forms a vital landscape element across many national borders. The Danube River serves as a migration corridor for many plants and animals over long distances in the large Danube River Basin in Europe. Correspondingly an international active member consortium emphasizing diverse aspects of river use and river preservation in the Danube River Basin built the International Commission for the Protection of the Danube River, (ICPDR).

The International Associationof Danube research (IAD) is the scientific network about relating to Danube research founded in 1956 (see further about IAD-history). The elecetd IAD-presidium consists of a president, a vice president an a general secretary are elected at an IAD-General Assembly for a 6-year voting period. The mission statment of the newly elected general secretary in 2018, issues on the rapidely changing Danube River ecosystem over recent decades (R). The IAD bulletin Danube News appears twice a year since 1999. Member country representatives (IAD-MCR) and more than ten expert group leaders who issue on water quality, habitat observation of different biota, nature conservation and sustainable development (IAD-EGL) are building an active network covering the vast majority of Danubian countries joining the IAD for many years. Among other activities as e.g having an observer role in the International Commission for the Protection of the Danube River (ICPDR), IAD organises every second year an international conference. The IAD-conference missions reflect a still ongoing attempt to enhance our understanding for today's changing environment in the Danube River or Danube River Basin (IAD-conferences).

Studies on algae and other photosynthetic microbes in the Danube River  have a long tradition in the history of IAD conferences since the 1950’s. During recent IAD conferences, about 12-15% of Danube research presentations relate to studies on microbial primary producers IAD conferences 2008-2018). These are photosynthetic organisms that either float freely and are carried along by the flowing water (phytoplankton) or live attached to the river bottom (phytobenthos). These studies describe in detail the abundance distribution of rare and common microbial autotrophic organisms across the Danube and its tributaries. In addition, their interactions with prevailing environmental influences and with other organisms within the benthic and planktonic communities, as well as their use as bioindicators for microhabitat reference conditions were investigated. In recent years, the response of microbial primary producers to current environmental pollution and eutrophication (excessive nutrient accumulation) and to global climate change has been studied. This shows that the current Danube has become a completely different habitat than a few decades ago for microorganisms, but also for many other aquatic organisms: see e.g. the opinion letter "No doubt about it - the Danube River Ecosystem is changing" by KT (2018), R.

cited References on this site for Danube River

Teubner K (2018) No doubt about it - the Danube River Ecosystem is changing. (Mission statement by IAD-general secretary) Danube News 38:2. Look-Inside FurtherLink 

Barta V, Janauer GA, Teubner K (2010) Spatial patchiness and similarity of macrophyte assemblages along a cut-off channel of the River Danube in Linz (Austria). In: Proceedings 38th International Conference of IAD, Dresden 2010, Germany, 5 pages Look-Inside FurtherLink 

Strausz V, Janauer GA, Teubner (2006) Predicted changes in macrophyte species composition induced by flooding in a Danube floodplain restoration area in Linz (Upper Austria). In: Proceedings 36th International Conference of IAD. Austrian Committee Danube Research / IAD, Vienna: 428-433. ISBN 13: 978-3-9500723-2-7 Look-Inside FurtherLink