Доклад конференции
СИНЕЗЕЛЕНЫЕ ВОДОРОСЛИ И «ЦВЕТЕНИЕ» ВОДЫ ОЗЕР КАРЕЛЬСКОГО ПЕРЕШЕЙКА КАК ПОКАЗАТЕЛИ ИХ ЭВТРОФИРОВАНИЯ
The waterbloom caused by mass development of bluegreen algae in lakes is the most obvious negative сonsequence of their anthropogenic eutrophication. Bluegreens waterbloom leads to undesirable changes in structure of lake ecosystem and its water quality. Complex assessment of ecological state of Karelian Isthmus lakes revealed noticeable transformations of their ecosystems due to intensive recreational activity and eutrophication. Total phytoplankton biomass and also share of bluegreen algae increased with increasing of lake trophy. In eutrophic and hypertrophic lakes mass development of bluegreens caused intensive waterbloom, especially in the hot summer 2010. But its level usually did not exceed the 2 degree of waterbloom according to existing classification - «moderate ecologicaly safe concentrations of algae». Several the most eutrophied lakes situated in the resort zone of Primorskii landscape with persistent waterbloom corresponde to the 3 degree -« undesirable ecologicaly dangerous concentrations of algae, causing essential decrease of water quality and biological pollution».
