For many aquatic macrophytes, considerable population
declines have occurred throughout much or all of their ranges as
a consequence of global environmental threats including progressive
eutrophication, large-scale land use changes, climate change
and related to these changes overall habitat loss (e.g. Sand-Jensen
et al., 2000; Kozlowski et al., 2008). One of the possible approaches
in preventing the decline or even extirpation of ecologically