Abstract
In Lake Łuknajno submerged macrophytes occupied 50% of lakearea and their mean biomass was 350~g dry weight m−2 in the1993 year. Maximum biomass values of charophytes reached highlevels above 1000~g dry weight m−2 (in a few samples). Duringthe last 20 years changes in submerged macrophytes were mainlyquantitative. In that period the area occupied by plants decreasedtwice, presumable by eutrophication. In 1993 Lake Łuknajno wasstill a Chara-type. Seven species of Characeae were recorded,Chara aculeolata and C.~tomentosa being the mostabundant. The contribution of charophytes to total dry weight ofall submerged macrophytes was 90%. At stations covered with Chara, phosphorus, nitrogen and chlorophyll concentrations weremarkedly lower than at stations devoid of plants.
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Królikowska, J. Eutrophication processes in a shallow, macrophyte dominated lake-species differentiation, biomass and the distribution of submerged macrophytes in Lake Łuknajno (Poland). Hydrobiologia 342, 411–416 (1997). https://doi.org/10.1023/A:1017055827120
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DOI: https://doi.org/10.1023/A:1017055827120