Plankton communities of the humic lakes in Teici Bog Reserve, Latvia
2005
Springe, G.(University of Latvia, Salaspils (Latvia). Inst. of Biology) | Briede, A.(University of Latvia, Salaspils (Latvia). Inst. of Biology) | Druvietis, I.(University of Latvia, Salaspils (Latvia). Inst. of Biology) | Rodinovs, V.(University of Latvia, Salaspils (Latvia). Inst. of Biology)
Teici State Reserve is a unique bog ecosystem with a diversity of vegetation and animals. The presence of humic substances causes dark brown water colour, high COD and low pH. In these waters plankton was formed by species tolerant to low values of pH and high humic substance concentrations. The composition of plankton species is simplified. The significant correlation between the number of planktonic species and pH is detected. Dyseutrophic lakes are characterized by comparatively higher algae biomasses than dystrophic ones. The relationship between the concentration of humic substances and total bacterial numbers are observed. Accordingly to the placement of lakes in the territory that is relatively isolated from human impact the development of planktonic organisms is determined mainly by the presence of humic substances.
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