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A large number of rivers transformed in the course of regulating them and associated changes in the natural environment requires special attention to be drawn to watercourses regulated by classical (technical) methods. Work aimed at remedying damage inflicted to the natural environment of rivers and valleys as a consequence of their technical regulation is being conducted on a number of rivers and...
W Polsce znajdują się 163 jeziora — zdecydowana ich większość leży na Pomorzu Zachodnim — które ze wzlędu na specyfikę fizyczno-chemiczną wód oraz charakter roślinności noszą nazwę jezior lobeliowych. Są to w większości małe, bezodpływowe zbiorniki, które ze względu na ubogą i niewielką zlewnię zachowały status jezior oligotroficznych. Występują w nich roślinne relikty borealno-atlantyckie, zaliczone...
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