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This paper is a compilation of studies concerning the effects of metal speciation on the growth of phytoplankton. Special attention is paid to the speciation and availability of iron in lake Tjeukemeer, The Netherlands. Under laboratory conditions the free ionic metal species generally appear to...
Samples ofK.hiantina and sediments were collected from iron ore tailings and other nearby sites within Tolo Harbour for heavy metal analysis. It was found that sediments as well as the clams at the tailings contained higher concentrations of Cd, Fe, Mn and Zn. Positive correlations between the...
Leachates of leaves of different age ofPolyalthia longifolia showed different activities on growth ofAzolla.
The composition of algal periphyton was examined on eleven species of submerged macrophytes collected at a depth of 0.25 m in Sewell Lake, southwestern Manitoba, a shallow nitrogen and phosphorus rich lake. There were substantial differences in the periphyton on all macrophyte species. Diatom...
During the period from 1981-07-23 to 1981-08-10, the River Rhine, from the Alps to the North Sea, was sampled for chironomid pupal exuviae. Samples were also taken from the Grande Canal d'Alsace and from selected tributaries. In all 78 samples were taken, of which 9771 exuviae were examined and...
The longitudinal distribution of macroinvertebrates and fish in a lower Niger delta river (R. Sombreiro) was studied from November 1979 to June 1982.
Size composition of colonies and settlement of larvae on nylon substrates as function of depth inDreissena polymorpha demonstrated differences in three lakes of different trophic state. In one lake, the data on size distribution in the colony and of the settled larvae also differed. The...
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