作者: Jürg Bloesch
DOI: 10.1007/BF02503007
关键词: Phytoplankton 、 Phosphorus cycle 、 Environmental chemistry 、 Phosphorus 、 Eutrophication 、 Nutrient cycle 、 Chemistry 、 Sedimentation 、 Epilimnion 、 Trophic state index 、 Ecology (disciplines) 、 Aquatic science 、 Ecology, Evolution, Behavior and Systematics 、 Water Science and Technology
摘要: In 1969/70, chemical and physical parameters, phytoplankton recent sedimentation at different levels were investigated in the mesotrophic Lake of Lucerne (Horw Bay) highly eutrophic Rotsee. The rates came to 1277.4 g dry matter/m2·year Horw Bay 879.3 analysis sediments included following components: total organic substance (loss on ignition), C, clay minerals (HCl-insoluble fraction), Ca, Mg, P, N, Fe Mn. Rotsee is distinguished by higher nutrient concentrations, (exceptions: minerals, Fe, a certain extent N Mn) greater biomass phytoplankton. distribution succession selected species groups are discussed, velocity sinking, degradation, growth dynamics measure trophic state calculated. For both lakes, phosphorus nitrogen balance have been drawn up. N:P ratio continually decreases running through cycle from input storing into bottom sediments. intrabiocoenotic epilimnion very intensive supplies approximately two thirds requirements for primary production