Der Rückgang des Schilfrohrs an den Berliner Seen: Schilfsterben durch Lausitzer Tagebaue und andere Faktoren

Der Rückgang des Schilfrohrs an den Berliner Seen: Schilfsterben durch Lausitzer Tagebaue und andere Faktoren
The reed is a plant that plays an important role both ecologically and economically. Det säkerställer rent vatten, förhindrar erosion på stränderna och fungerar som en livsmiljö för många djur. Det har emellertid skett en nedgång i vasset på Banks of the Berlin Lakes i flera år. Forskare vid Leibniz Institute for Water Ecology and Inland Fishing och Humboldt University i Berlin har funnit att cirka 20 procent av denna nedgång beror på närvaron av sulfat.
The sulfate comes into the Spree due to the lignite mining in Lusatia, from where it gets into the Berlin waters. In the mining, iron sulfur compounds are released, which connect to sulfuric acid and iron in the air and then get into the water. While the iron settles on the rivers, the invisible sulfate remains in the water and is transported over long distances. Usually sulfate in high concentrations for reed plants is not poisonous and remains stable in the presence of oxygen. However, poisonous sulfide can be created under lack of oxygen and at high concentrations.
The reeds are not only caused by sulfate, but also by other factors. Hittills har synliga problem som skador orsakade av frakt, banker, djurfoder och skuggning av träd betraktats som orsaker till nedgången i vasset. The influence of Sulfate, on the other hand, was hardly taken into account because it had no obvious visible effects.
För närvarande är sulfatens bidrag till nedgången i vasset fortfarande relativt låg jämfört med andra faktorer som närvaron av träd. However, it can be expected that the sulfate concentration in the Spree will continue to increase in the coming years. As a result, the effect of sulfate on the reed could also increase.
In order to stop the reversal of the reed, various measures would have to be taken. On the one hand, this includes reducing the sulfate entry into the Spree. This could be achieved, among other things, through filter systems or technical changes in lignite mining. In addition, further measures should be taken to reduce the other factors that contribute to reeds. This includes, for example, the protection of the shores from waves, avoiding the bank construction and promoting a species -rich animal world.
The preservation of the reed as an ecologically significant plant is of great importance. Det är därför viktigt att alla ansvarsfulla åtgärder vidtas för att vända den sjunkande trenden av vassen till Berlin -sjöarna och därmed upprätthålla livsmiljöer för djur och skydda vattnet.