Phytoplankton diversity and their succession in water bodies of the Lednice park during 2002 season
2004
Ramezanpoor, Z. | Sukop, I. | Hetesa, J. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Rybarstvi a Hydrobiologie)
Phytoplankton communities of three water bodies (Zamecky pond, Ruzovy pond, Dyje River) in the Lednice park (Czech Republic) were studied from 22nd April till 1st October 2002. Phytoplankton samples were taken every two weeks between 8-9 a.m. and preserved with 4 % formalin solution and Lugol solution. Heavy algal bloom was observed in the Zamecky pond in mid-summer. A light algal bloom was also observed in the two other sites nearly by the end of summer. Altogether, 317 phytoplankton species were recorded in the studied sites. The main algae species responsible for the bloom were Anabaena flos-aquae, Microcystis aeruginosa, M. ichtyoblabe, M. flos-aquae, and M. wesenbergii. Dissolved oxygen values varied between 3.4-19.5 mg/L, pH ranged from 7.6 to 9.7, Secchi depth ranged between 0-65 cm in the Zamecky pond, 15-45 cm in the Ruzovy pond and 35-65 cm in the Dyje River. Although the Dyje River is the main water source for both ponds, the variability of phytoplankton communities in these ponds suggests that probably different nutrient sources were responsible for the differences observed.
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