fot. Miejskie Koło Hutnik w Lubaczowie

Na zbiorniku wodnym w Starym Lublińcu trwają prace związane z usuwaniem nadmiernie rozwiniętej roślinności. Działania mają ograniczyć zarastanie akwenu, poprawić warunki panujące w wodzie i zmniejszyć ryzyko kolejnego masowego śnięcia ryb.

Roślinność wodna jest naturalną i potrzebną częścią ekosystemu. Problem pojawia się jednak wtedy, gdy zaczyna zajmować zbyt dużą powierzchnię zbiornika. Utrudnia wówczas swobodny przepływ oraz mieszanie się wody, a jej obumarłe fragmenty opadają na dno i zaczynają się rozkładać.

Podczas rozkładu materii organicznej zużywane są duże ilości tlenu, którego może później zabraknąć rybom i innym organizmom żyjącym w zbiorniku. Usuwanie nadmiaru roślinności ma więc ograniczyć ilość zalegającej biomasy, poprawić cyrkulację wody oraz zapobiegać dalszemu zarastaniu akwenu.

Prowadzone prace są szczególnie istotne przed okresem wysokich temperatur. Upały zwiększają ryzyko wystąpienia tzw. przyduchy, ponieważ cieplejsza woda zawiera mniej rozpuszczonego tlenu. Jednocześnie ryby, mikroorganizmy i rośliny nadal go zużywają. Najtrudniejsze warunki mogą pojawiać się nocą i nad ranem, gdy ustaje produkcja tlenu w procesie fotosyntezy.

Sytuację może dodatkowo pogarszać brak wiatru, ograniczone mieszanie się wody oraz duża ilość rozkładającej się roślinności. W takich warunkach poziom tlenu może gwałtownie spaść do wartości zagrażających życiu ryb.

W Starym Lublińcu skutki przyduchy były już bardzo poważne. Podczas jednego z takich zdarzeń ze zbiornika wyłowiono aż 1300 kilogramów padłych ryb. Jako przyczynę wskazano wówczas gwałtowny spadek zawartości tlenu w wodzie. Podobna sytuacja miała miejsce również w 2021 roku.

Obecne działania mają więc nie tylko poprawić wygląd zbiornika i ułatwić korzystanie z akwenu. Ich ważnym celem jest także ograniczenie czynników, które podczas nadchodzących upałów mogłyby ponownie doprowadzić do niedoboru tlenu i masowego śnięcia ryb.

Jak w praktyce wygląda usuwanie nadmiernej roślinności ze zbiornika, pokazuje w mediach społecznościowych Miejskie Koło „Hutnik” w Lubaczowie. Na opublikowanych materiałach można zobaczyć przebieg prowadzonych prac oraz ilość roślin wyciąganych z wody.

fot. Miejskie Koło Hutnik w Lubaczowie

Nie chcą powtórki sprzed lat. Ważne prace na zbiorniku w Starym Lublińcu [ZDJĘCIA] - ZLUBACZOWA.PL - Informacje Lubaczów, powiat lubaczowski

Oczyszczanie zbiornika w Starym Lublińcu

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