Dead fish in Linz: Heat wave and dryness demand tribute!
Dead fish in Linz: Heat wave and dryness demand tribute!
In Linz-Belsberg, a worrying fish death has made the round when around 1,500 dead fish were discovered in the Krems on Thursday. The causes are alarming: a low water level due to persistent dryness and an extreme heat wave have overheated the water and drastically reduced the oxygen content. This represents an acute danger to many fish species, as KURIER reports that ....
Environmental Councilor Stefan Kaineder from the Greens commented on the critical situation and explained that such incidents are not isolated. Fish already died in other regions such as in Mattighofen, where a section of the mattig has dried out. Experts of the water supervision document the water level development nationwide, while information about overall hydrological assessment is available online.
climate change as the main cause?
Similar problems can not only be observed in Austria. In northern Germany, in regions such as Hamburg and Schleswig-Holstein, there are also dramatic fish deaths. Here are climate change, long drought phases and heavy downpours are the main causes. High temperatures also cause a threatingly low oxygen content in the water. Every year there are around 100 cases of oxygen lowering in Mecklenburg-Western Pomerania, which also strongly endanger other organisms such as mussels and crabs. These developments are explained by [NDR ...] (https://www.ndr.de/nachrichten/info/fischsterben-im-norden-auch-fehn-des-dawandels, Fischsterben476.html).
The oxygen content in waters, which falls below four milligrams per liter and is fatal for fish, is particularly critical. In addition to evaporation and the high water level, the reason for this is also the wastewater overflows, which also rinse organic material in the water for heavy rain. Experts therefore strongly recommend measures to renaturate the water to improve the bank conditions and thus help to cool the waters.global perspective on lack of oxygen
climate change draws a worrying balance because it leads to a loss of the oxygen concentration in lakes worldwide. A study shows that the oxygen content has decreased in 83 percent of the lakes examined worldwide - and that on average by 0.05 milligrams per liter per liter. The main cause is the increase in the water temperature due to global warming. The short-term heat waves and eutrophication also contribute to it, as the Süddeutsche Zeitung shows that ....
The projections for the future are dark: by the end of the century, the dissolved oxygen could decrease by about 4.3 percent per decade, which should particularly hit tropical waters. But many lakes in North America and Europe are already affected. It turns out that climate change not only threatens the survival of certain fish species, but also has far -reaching consequences for the entire water ecology. These developments require urgent solutions and measures to improve the condition of our waters and to secure the quality of life for the organisms living in them.
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| Ort | Krems an der Donau, Österreich |
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