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Mean Trophic Rank (MTR), a new British biological macrophyte-based method for assessing trophic status of rivers was applied in Poland in 2000-2001. The occurrence and abundance of 86 aquatic plant species was recorded at 48 sites on 19 rivers in the lowland part of Poland. Forty-six of these species are MTR scoring taxa used in the British system, but another 40 species were recorded of which 11...
An algal growth test was used to show the trophic state of the water of the Dobczyce Reservoir and its direct tributaries. The Dobczyce Reservoir showed a lower trophic level than its affluents. So far, the reservoir has been mesotrophic, but shows a tendency to increase from year to year. The trophic level of its water was less than that of the Goczałkowice Reservoir, which was eutrophic.
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