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Last update: Nov. 2004

Status: OPEN [2000-03]

"Significance of external / anthropogenic Nitrogen for central Baltic Sea N-CYCLING"
Project description:
The project SIGNAL addresses the crucial question of the eutrophication
sources and what impact additional nitrogen has on the productivity in
remote regions. The investigation will be carried out in the Baltic sea
where the impact of eutrophication is one of the main threats to the
ecosystem due to the 80 million people living in its watershed. The
nitrogen input from the rivers, the atmosphere and N2 fixing cyanobacteria
will be qualitatively and quantitatively assessed. This task will be
accomplished through regular measurements in the mouths of several rivers,
and in the precipitation. Stable isotope ratios of the most important
elements are indicating eutrophication from various sources and have not
been used simultaneously. However previous studies proved the utility of
stable isotope ratios as indicators of external nitrogen inputs(.eg.
fertilizer and soil runoff) and that they allow the identification of
pathways through the ecosystem. Finally the role of the imported nitrogen
for the productivity of the central Baltic Sea will be evaluated by means
of budget calculations and box modelling.

Project lead:   Universität Rostock
Department:   Institut für Ostseeforschung Warnemünde IOW
Address:   Seestrasse 15
Postal code:   18119
City:   Rostock
Country:   DE
Project coordinator:   Dr. Maren VOSS
Phonenumber:   49 38 1519 7209
Faxnumber:   (49-381)5197440
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Eloise Consortium and Secretariat, PB 100, NO-2027 KJELLER, Norway
Centre for Ecological Economics, NILU
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