APHANIZOMENON;
DAPHNIA;
FISH PONDS;
PLANKTON COMPOSITION;
D O I:
10.1002/iroh.19910760107
中图分类号:
Q17 [水生生物学];
学科分类号:
071004 ;
摘要:
Summer blooms of Aphanizomenon flos-aquae var. flos-aquae accompanied by dense populations of Daphnia were common in fish ponds of the district Blatna in 1950s-1960s. Changes in management (increased stocking densities, decreased usage of superphosphate as fertilizer) made this type of plankton less frequent. The present study documents this trend and suggests explanations.