Abiotic and biotic control of phytoplankton development in dynamic side-arms of the River Danube

River Systems ◽  
2006 ◽  
Vol 16 (4) ◽  
pp. 577-594 ◽  
Author(s):  
Patricia Riedler ◽  
Christian Baranyi ◽  
Thomas Hein ◽  
Susanne Keckeis ◽  
Michael Schagerl
Keyword(s):  
River Danube ◽  
Biotic Control

Nutrient Input and Trophic Status of the “Neue Donau”, a High-Water Control System along the River Danube in Vienna, Austria

1990 ◽  
Vol 22 (5) ◽  
pp. 137-144 ◽  
Author(s):  
M. T. Dokulil ◽  
G. A. Janauer
Keyword(s):  
Water Quality ◽  
Control System ◽  
Trophic Status ◽  
High Water ◽  
Nutrient Concentrations ◽  
Nutrient Input ◽  
Water Control ◽  
Trophic Conditions ◽  
River Danube ◽  
High Nutrient

The system “Neue Donau” functions as a control system for high waters of the river Danube and is an important recreational area for many people. Water quality and trophic status of the water body is thereforeof prime importance. The high nutrient concentrations of the river Danube (P-tot 238±41µg/l, N-tot 2.53±0.78 mg/l) reach the system via groundwater seepage. Present conditions in the basin of Neue Donau are,as a result of this nutrient in-flux,eutrophic to hypertrophic. Average values during the summer period have declined from 366 µg/l total phosphorus to 78 µg/l, and from 86 µg/l chlorophyll-a tol7µg/l between the years 1985 and 1988. However, a dam which is planned in the river at Vienna will permanently raise the water level of the river thus increasing the the groundwater flow in the direction to the Neue Donau and therefore the nutrient input which will enhance trophic conditions in the impoundment. Since macrophytes play an important role in one part of the system macrophyte management together with measures along the river are some of the suggested strategies to keep the system Neue Donau at acceptable trophic conditions and good water quality.

scholarly journals Biotic Control of Surface pH and Evidence of Light-Induced H+ Pumping and Ca2+-H+ Exchange in a Tropical Crustose Coralline Alga

PLoS ONE ◽  
2016 ◽  
Vol 11 (7) ◽  
pp. e0159057 ◽  
Author(s):  
Laurie C. Hofmann ◽  
Marguerite Koch ◽  
Dirk de Beer
Keyword(s):  
Crustose Coralline Alga ◽  
Coralline Alga ◽  
Surface Ph ◽  
Biotic Control

scholarly journals The Effect of the Peak Discharges of River Danube on Istanbul Strait (Bosphorus)

2020 ◽  
Vol 7 (2) ◽  
pp. 108-113
Author(s):  
Yavuz KARSAVRAN ◽  
Tarkan ERDİK ◽  
Zeynep Özge TERZİOĞLU
Keyword(s):  
River Danube ◽  
Peak Discharges
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