„Wir müssen auch die Grundwasser-Ökosysteme schützen“
Ein Interview mit dem Limnologen Christian Griebler.
Die Vereinten Nationen haben den Weltwassertag 2022, der am 22. März begangen wird, unter das Motto „Grundwasser – das Unsichtbare sichtbar machen“ („Groundwater – making the invisible visible“) gestellt. Das kommt dem Anliegen des Limnologen Christian Griebler von der Universität Wien sehr entgegen. Er forscht zu Grundwasserorganismen und ihrer Rolle für die Reinigung des Wassers.
Grundwasser ist unsichtbar, aber seine Auswirkungen sind überall sichtbar. Mit der Verschärfung des Klimawandels wird das Grundwasser immer wichtiger werden.
Sonja Bettel: Herr Griebler, warum sollten wir das Grundwasser sichtbar machen?
Christian Griebler: Die Landoberfläche ist zu 100 Prozent auch Grundwasseroberfläche, man muss nur tief genug hinunter gehen. In manchen Bereichen sind das ein bis zwei Meter, in manchen 20 Meter. Unter unseren Füßen haben wir flächendeckend Grundwasser. Dieses Grundwasser ist nicht nur die wichtigste Ressource für das Trinkwasser, sondern auch ein belebtes Ökosystem mit Mikroorganismen und vielen kleinen mehrzelligen Organismen wie Krebstierchen, Milben, Schnecken, Würmern und verschiedenem mehr.
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