|Vergeleichende Untersuchungen über Hydrochemie und Plankton deutscher Flussmündungen = Comparative investigations on hydro-chemistry and plankton of German estuaries|
Kühl, H.; Mann, H. (1968). Vergeleichende Untersuchungen über Hydrochemie und Plankton deutscher Flussmündungen = Comparative investigations on hydro-chemistry and plankton of German estuaries. Helgol. Wiss. Meeresunters. 17: 435-444
In: Helgoländer Wissenschaftliche Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0017-9957, more
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The three German rivers Elbe, Weser and Ems were examined in regard to their chemical mechanisms and their phyto- and zooplankton distributions. The subdivision of the examined river sections into salinity zones has proved to be satisfactory. Their expansion is determined by the topography as well as by the amount of discharge of the river. Increase and decrease of plankton communities of fresh- and salt-water are based thereon, whereby the supply of sewage water of big towns is of great importance. The lower regions of the examined rivers have their own endemic communities. Many species exhibit two maxima, one within the limnic region, the other in the polyhalinicum. Knowledge of the present plankton communities is important in order to be able to recognize any changes which may be caused through increased industrial drainages.