Ecological characteristics of lakes in north-eastern Poland versus their trophic gradient. 12, Dependence of chosen indices of structure and functioning of ecosystems on trophic status and mictic type of 42 lakes

Kajak, Zdzisław

doi:ISSN 0420-9036

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Ecological characteristics of lakes in north-eastern Poland versus their trophic gradient. 12, Dependence of chosen indices of structure and functioning of ecosystems on trophic status and mictic type of 42 lakes Kajak, Zdzisław

Object structure

Dependence of chosen indices of structure and functioning of ecosystems on trophic status and mictic type of 42 lakes ; Ecological characteristics of lakes

Kajak, Zdzisław

Polska Akademia Nauk. Instytut Ekologii

Polish Scientific Publishers

Warszawa

1983-1984

Pages 495-530 : illustrations ; 24 cm ; Bibliographical references (pages 528-530) ; Abstract in Polish

Journal/Article

lakes ; trophic state ; mixis ; structure and functioning of ecosystems

Polymictic lakes have a higher trophic state than dimictic ones, mainly because more nutrients are returned from the bottom sediments to the water. Biomass of phytoplankton (mainly blue-green algae) and of rotifere increase to the highest phosphorus concentrations in polymictic lakes, and reach much higher values than in dimictic ones. Regular changes of 42 indices of lake ecosystem structure and functioning versus their trophic state have been characterized. However, the scatter of values of indices is great, especially in the most hypertrophic lakes, having frequently unexpected characters for so high trophic state.

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