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By Hans-Jürgen Krambeck, Dieter Albrecht, Barbara Hickel (auth.), Jürgen Overbeck, Ryszard J. Chróst (eds.)

Lake Plußsee is a small eutrophic kettle lake in northern Germany. since it is sheltered and has no influx from rivers, the Plußsee indicates sturdy stratification and is principally compatible for limnological reviews. This ebook offers the result of large learn carried out at the ecophysiology of microorganisms - mostly micro organism - on the Plußsee during the last a number of many years. It starts off with 3 chapters at the basic limnological nation of the lake: actual components, inorganic food, plankton composition and succession, fish fauna, and so forth. those chapters are via discussions of dissolved natural subject and photosynthetic creation of natural topic via phytoplankton. the rest of the booklet addresses the dynamics of constitution, functionality and metabolism of the microorganisms within the Plußsee.

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Das Phytoplankton einiger Ploner Seen. Forsch Ber Bioi Stn Pion 10: 116-171 Lieder U (1983) Die Arten der Untergattung Eubosmina SELIGO, 1900 (Crustacea: Cladocera, Bosminidae). Mitt Zool Mus Berl59:195-292 Loose C (1987) Populationsokologische Untersuchungen an hypolimnischen Radertieren (Rotatoria) des PluBsees. MSc Thesis, Kiel University, Germany Lundbeck J (1926) Die Bodentierwelt norddeutscher Seen. Arch Hydrobiol SuppI7:1--473 Overbeck HJ (1968) Bakterien im Gewasser-Ein Beispiel flir die gegenwiirtige Entwicklung in der Limnologie.

Autochthonous production seemed to be an important input source of DTCHO for PluBsee DOM. Dissolved Polyphenols Polyphenolic compounds are regarded as the main building blocks in aquatic dissolved humic matter and in the past were a main concern in soil and aquatic 2. 1. d. d. d. d. d. d. d. d. d. d. d. d. d. d. d. c Fattyacids f Organic acids aModified from Miinster (1993). Percentage contribution of fraction to the total dissolved organic carbon is given in parentheses. Samples were taken from the epilimnion (0-1 m) and from the interfaces between epilimnion and metalimnion (3-5 m) and the metalimnion and hypolimnion (5-8 m) and from the deep hypolimnion (20-25 m).

C Q. 17. The total biomass of A phytoplankton and (B) zooplankton in the PluBsee in 1986 after the pumping experiment. I. 200 A "...... Q) ~ «I <:::. U 900 ell ...... : «I c:::. U ell ; '. \/ 00 . ,, , . : i : ~. '. t~ , / ' ' . .. 18. (A) Biomass of phytoplankton and zooplankton after the pumping experiment in 1986. The zooplankton biomass was about 500% higher than in previous years. (B) Annual pattern of biomass of phytoplankton and zooplankton in the PluBsee before the pumping experiment.

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