the effects of eutrophication are the result of nutrient transports
and transformations in a number of different systems, management
without understanding the links between the systems is likely
to result in more costly mitigation programmes than necessary.
Currently, our understanding of this is fragmented. There
is a need to utilise and synthesise scientific information
pertinent to the relevant problem and management scale. A
common language for communication between scientists and managers,
and a consensus about scales, problems and causes, needs to
The overall goal of the MARE research programme is to develop
a user-friendly, computer-based decision support system and
to introduce it to managers as a tool for identifiying cost-effective
strategies to counteract eutrophication of the Baltic Sea.
That is the whole idea of Nest, the decision support system.
It is still a prototype, but one that is continuously being
further developed in collaboration between researchers and
models that synthesize knowledge in ecology, physical oceanography,
biogeochemistry, and economics, are used to develop this system.
The objective of the MARE programme is to make it possible
for decision-makers and managers working on Baltic Sea environmental
issues to use the results of the calculations made in the
Nest system as a basis for decisions on measures. Main target
groups in this respect are decision-makers within the Helsinki
Commission (HELCOM), as well as those in the Baltic Sea States
working on the implementation of the EU Water Framework Directive.
the aim is to assist scientists and decision-makers in their
effort to identify cost-effective measures or combinations
of such measures to reduce nutrient loads and, consequently,
counteract eutrophication to the Baltic Sea for the purpose
of reaching the environmental targets that have been set.
To be able to fulfil this goal, a decision support system
needs to describe the relationship between the state of the
environment and the costs for achieving a certain desired
state (an environmental target). The state of the environment
at different concentration levels of nitrogen and phosphrous
needs to be coupled to the relationship between nutrient inputs
(loads) and concentrations in the water, and finally to the
costs for nutrient reductions from the most important sources
of waterborne or airborne nutrients.
to work in the decision support system, Nest? Read our user's
Try yourself to use the prototype of the Nest system! Go to
Read more about the development of Nest (WP 1 of the MARE
programme) in the programme
Read more in the MARE
programme annual reports about the development of the
decision support system Nest.
scientific information been used before by decision-makers
in the Baltic Sea region as a basis for environmental decisions?