ISSN:
1573-5117
Schlagwort(e):
cyanobacteria
;
shallow lakes
;
Planktothrixagardhii
;
Limnothrix redekei
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract Lakes in the Scharmützelsee-region (East-Brandenburg,Germany) were found to be dominated either by Limnothrixredekei or Planktothrix agardhii. These dominanceregimes were stable over the whole investigation period from1993 to 1995. Six lakes (maximum depth between 2 and 12 m)were compared in regard to physical and chemical conditions tofind reasons for the superiority of the first or the secondspecies. All investigated lakes are polymictic but show,nevertheless differences in their mixing-behaviour. In lakesdominated by Limnothrix redekei stratification eventsoccur more often than in the lakes dominated by Planktothrix agardhii. The latter are more windexposed due totheir greater size and/or their surroundings. In combinationwith polymixis light and nutrient supply are discussed as thekey factors for the species composition. A lower content ofsoluble reactive phosphorus and lower light supply areconsidered as possible advantages for Limnothrix redekeiover Planktothrix agardhii in three lakes. A lower totalnitrogen/total phosphorus ratio may be a reason for thedominance of Planktothrix agardhii in the other threeinvestigated lakes.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1017013208039
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