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Ulrich Einsle (1967)
Über einige Auswirkungen der Eutrophierung des Bodensee-Obersees auf seine planktisch lebenden CopepodenpopulationenSchweizerische Zeitschrift für Hydrologie, 29
J. Grim (1955)
Die chemischen und planktologischen Veränderungen des Bodensee-Obersees in den letzten 30 JahrenArch. Hydrobiol., Suppl. 22
U. Einsle (1967)
Über einige Auswirkungen der Eutrophierung des Bodensee-Obersees auf seine planktisch lebenden CopepodenpopulationenSchweiz. Z. Hydrobiol., 29
EUTROPHICATION: INTRODUCTION TO THE PROCESS AND SOME ECOLOGICAL IMPLICATIONS J. RINGELBERG (Department of Aquatic Ecology, University of Amsterdam, Kruislaan 320, Amsterdam, The Netherlands) Eutrophication is a process of increasing primary production in the aquatic environment caused by an increased allochthonous input of inorganic nutrients. As long as this input is present eutrophication continues until other factors such as irradiation become limiting. The process of eutrophication is a gradual one, its velocity depending a.o. on the velocity of the nutrient input. At a particular time an aquatic system has a certain trophic level which can be described by relevant state variables such as the amount of primary production or, less adequate because a derivative, the amount of phytomass. During eutrophication a continuous series of transient trophic levels are present. Therefore, the different levels pictured in Fig. 2 are connected by transients. As a ~tarting point the oligotrophic situation (Fig. 2A) can be chosen. It does not mean oligotrophy is the "natural" status of a lake. If we exclude man from being natural, natural allochthonous nutrient inputs (thus not caused by man) occur which lead to certain levels of eutrophication. From the point of view of water management it is better
Aquatic Ecology – Springer Journals
Published: Nov 8, 2005
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