Role of macrophytes in the variability of zooplankton community structure in the littoral zone of shallow lakes
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Distribution, diurnal variability, aggregation of zooplankton in the littoral zone of lakes and effect of various macrophyte species on the structure of its community are considered.
It is shown that the horizontal migrations of zooplankton, both direct and reverse ones, are caused mainly by the pressure of fish. The effect of predacious zooplankton is less important and is directed mainly at small-sized species. The intensity of horizontal migrations of zooplankton decreases with depth, while the effect of shore avoidance is observed for the large-sized zooplankton species and is caused not only by the pressure of fish but also by other factors, most likely abiotic.
The problem of interaction between macrophytes and zooplankton cannot be reduced to the role of macrophytes as a refuge. Allelopathic properties of macrophytes, competitive relations between separate zooplankton species in macrophyte thickets, as well as the effect of predacious invertebrates associated with macrophytes on zooplankton remain unclear. The role of macrophytes as a factor causing changes in hydrodynamic processes in the littoral regions of lakes is also unknown.
KeywordsShallow Lake Littoral Zone Contemporary Problem Zooplankton Species Fish Pressure
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