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Fig. 11.6 Simplified pollen diagram of core 345580-11
diatom valves was observed. Their very low frequency and the poor state of preser-
vation indicate the intensification of chemical dissolution processes and mechanical
fragmentation. The diatom community in the sample at 11-16 cm in core 345580
was also poorly preserved, but quite abundant and represented by diverse taxons
(Fig. 11.8 ) .
Two ecological groups among the predominant benthic freshwater diatoms can
be distinguished:
Fig. 11.7 Simplified pollen diagram of core 345600
 
 
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