The authors wish to acknowledge the contribution of the following people: Claire McAtamney who conducted field-work, laboratory analysis and data collation. Beverly Kelso contributed to data analysis, and edited and collated the report. Mrs. Gillian McCullough Annett, helped with laboratory analysis work, and also assisted with field work. Brian Stewart, for his advice regarding chemical analysis. Sara McGuckin, who calculated river catchment areas and provided CORINE land cover data. Karl Embleton, who calculated basin volumes. Mr. Leo Cunningham, for providing boat services throughout this study. River nutrient loadings were calculated by Dr. David Lennox (D.A.N.I., Biometrics

V.Bostan et a!.- Nutients and trophic status of flre Danube Delta lakes gths r the the

The nutrient and trophic status were used to assess the impact of human activities on lagoon by determining the trophic status of the lagoons and then using nutrient parameters and transparency in a form of model to predict the trophic status index (TSI) of the lagoon waters. The trophic index

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evidence of rapid recent

lakes trophic status and the introduction of alien species

We surveyed the trophic status and its limiting factors of the Three-Gorges Reservoir (TGR) in China, including 153 sites in the mainstream of Yangtze River and 17 tribu-tary bays quarterly for one year after the first full-capacity impoundment (175 m above sea level.) in 2010. Carlson-type trophic

Studies were carried out in three lakes of strongly contrasting trophic state to evaluate how the effects of zooplankton on phytoplankton vary as a function of lake productivity. Chlorophyll and total P concentrations differed by 2-3 orders of magnitude among ultra-oligotrophic Lake Tahoe, meso

of iron deficiency on photosynthesis

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