About the Website
The contents of this website was originally written and published as
an assessment report: Nutrients
and Eutrophication in Danish Marine Waters. A Challenge for Science and
The report has been modified to fit the web-media
but the text and figures in this 1. version are, apart from minor corrections,
identical to the book.
The objective of the original assessment report was to describe and document
the effects and degree of nutrient enrichment and eutrophication status
in all Danish marine waters by addressing the following questions:
- What is nutrient enrichment and eutrophication?
- What are the causes and actual effects?
- Temporal trends: what is natural variation and what is due to human
- What has been done so far in Denmark to reduce eutrophication in Danish
- How can the findings be used and transformed into an informed management
The assessment was written in order to fulfil the Danish obligations
in relation to the OSPAR Common Procedure. However, the assessment covers
not only the OSPAR areas: the North Sea, Skagerrak and Kattegat, but all
Danish marine waters, including the transitional waters (the Sound and
Belt Sea) between the Kattegat and the Baltic Sea, as well as the western
parts of the Baltic Sea. This is because:
- the outflow from the Baltic Sea has a large influence on the Kattegat
– Belt Sea ecosystems, and
- the eutrophic state and development of the Kattegat and Belt Sea runs
in parallel and is interrelated.
The assessment focuses on factors and parameters that cause, control or
respond to eutrophication. Special attention is put on ecological status
and temporal trends. Seasonal variations and more system-orientated descriptions
of the fluxes and turnover of nutrients have been mitigated. The assessment
is not a comprehensive assessment of the health of the marine environment
in Denmark or a textbook in marine ecology. The assessment is more or
less an extended summary of more than 13 years of monitoring and subsequent
production of different assessments reports on the state of the marine
environment within the framework of the Danish National Monitoring and
Assessment Programme (1988-2003).
Most of the figures are presented as clickable thumbnail-versions which
links to a larger figure. The figure-pages can also be accessed by links
i the figure text and many of the figure-pages can be accessed directly
by hyperlinks in the text.
Many of the background data for the figures has been made available and
can be downloaded from the figure-pages.
Selected words from the glossary are hyperlinked form the text.
Reproduction and use of figures and data is permitted provided the
source is explicitly acknowledged. In question of doubt please contact
Please cite as:
Ærtebjerg, G., Andersen, J.H. & Schou Hansen, O. (eds.) 2003:
Nutrients and Eutrophication in Danish Marine Waters. A Challenge for
Science and Management. National Environmental Research Institute.