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The investigations are carried out in 6 ecosystem types.

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Specimen types

The specimen types have been selected in such a way as to permit load observations within both a spatial and a time framework, thereby providing optimum information about overall conditions in the various sampling areas.

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Sampling areas

The sampling areas have been selected to represent adequately the major types of ecosystems in Germany and taking into account the varying intensities of anthropogenic impact and land use.

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Analytes are the subject of investigation and have been chosen to represent substances or groups of substances that describe either a basic physiological state or else toxic or carcinogenic conditions.

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Time References

A chronicle of the sampling years.