The Oder Estuary - IOW

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10 The trophic state
According to the OECD (1982) classification scheme, the Oder Lagoon has to be regarded as a
hypertrophic system. The Landesamt für Umwelt, Natur und Geologie Meckenburg-Vorpommern
(LUNG) applies an own more detailed classification system. It differentiates between heavily
eutrophied, polytrophic and hypertrophic. After this scheme, the lagoon has a state between heavily
eutrophied and polytrophic, depending on the considered year. The trophic state of the Pomeranian
Bay, close to the Swina mouth, is between eutrophic and heavily eutrophic.
Figure 10.1: The trophic situation in the Oder Lagoon compared to three eutrophic lakes in
northern Germany (SCHERNEWSKI 1999) and the world wide lakes in OECD (1982).
The figures are modified after OECD (1982).
Figure 10.2: The trophic situation in the Oder Lagoon compared to three eutrophic lakes in
northern Germany (SCHERNEWSKI 1999) and the world wide lakes in OECD (1982).
The figures are modified after OECD (1982).
The comparison of chlorophyll-a, nitrogen and phosphorus concentrations in the Oder Lagoon with
data from other lakes and lagoons (Fig. 10.1 and 10.2) clearly reflects the outstanding high