Quantitative relationships between oligochaete communities and phosphorus concentrations in lakes |
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Authors: | CLAUDE LANG |
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Institution: | Conservation de la faune, Marquisat, St. Sulpice, Switzerland |
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Abstract: | SUMMARY. - 1 The relative abundance of oligotrophic species in tubificid and lumbriculid communities was related to phosphorus concentration in eight lakes of Western Europe and three large lakes of North America.
- 2 Mean annual concentrations of total phosphorus, recorded in the whole lake during the 5 years preceding the sampling of worms, were averaged and this mean was used to indicate the trophic state.
- 3 Mean relative abundance (%) of oligotrophic species (OS) was negatively correlated with mean concentrations (mg m?3) of total phosphorus (TP): OS = 80.29 – 8.35 TP0.5r2= 0.81
- 4 Location and depth from which worms were sampled also influenced values of OS.
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