32P uptake in three submerged aquatic plant species Sasadhar JanaMonojit A. Choudhuri OriginalPaper Pages: 97 - 101
Food selection and consumption by estuarine nematodes K. RomeynL. A. Bouwman OriginalPaper Pages: 103 - 109
Age structure of the populations ofPisidium species from two localities in southern Poland Anna Dyduch-Falniowska OriginalPaper Pages: 111 - 117
Ecological and morphological observations onHydrobius niger (Zschach, 1788) andHydrobius fuscipes (Linnaeus, 1758) (Coleoptera, Hydrophilidae) Th. G. Giesen OriginalPaper Pages: 119 - 127
Fish impingement at power stations situated along the rivers Rhine and Meuse in The Netherlands R. H. HadderinghG. H. F. M. van AerssenJ. W. Van Der Stoep OriginalPaper Pages: 129 - 141
Phosphorus removal in a sewage treatment plant and plant biomass in an effluent receiving lowland stream F. A. Kouwe OriginalPaper Pages: 143 - 156
Problems of ecologists as experts in environmental decision-making in The Netherlands Jacqueline Cramer OriginalPaper Pages: 157 - 167
Studies of the ecophysiology of algae in the laboratory of microbiology of the University of Amsterdam (summaries) Abstract Pages: 169 - 178