ecological catastrophe in Oder River

[butters]

https://www.msn.com/en-us/news/worl...pc=U531&cvid=22f103403b624a018645e20e507a58c3

ten ton of dead fish removed last week, still unclear what caused it

“So far, at least 150 samples of water from the Oder River have been tested. None of the studies have confirmed the presence of toxic substances. At the same time, we are testing fish. No mercury or other heavy metals have been found in them," she said.
She said some Oder water samples were being sent to foreign laboratories to be tested for about 300 substances.

wonder if it's heat-related...lack of overnight oxygen, but i'm pretty sure that would have been checked for already, though, given the heat-waves over europe.

 

[jaF0]

I'll bet that made an Oder.

 

[oggbashan]

It is probably a lack of oxygen as the river flow shrinks and the water gets hotter.

Locally one of our fishing lakes has had a similar die-off and nowe the angling club has installed four oxygenation plants operating 24 hours a day but they are not sure that will be enough to prevent more fish from dying.

 

[butters]

It is probably a lack of oxygen as the river flow shrinks and the water gets hotter.

Locally one of our fishing lakes has had a similar die-off and nowe the angling club has installed four oxygenation plants operating 24 hours a day but they are not sure that will be enough to prevent more fish from dying.

it was what sprang to mind but isn't that something that could be ascertained quite quickly?

 

[colddiesel]

It probably is caused by high temperatures and poorly oxygenated water. We get it in Oz frequently. However, these conditions also tend to produce algal 'blooms' which interfere with the fishes capacity to use the limited Oxygen available. Millions of fish have died in the Murray Darling system in the last 2 years, substantially due to irrigators taking more than their allocation.

 

[Rightguide]

The answer is probably here:
https://www.usgs.gov/special-topics/water-science-school/science/water-qa-what-causes-fish-kills

 

[butters]

The answer is probably here:
https://www.usgs.gov/special-topics/water-science-school/science/water-qa-what-causes-fish-kills

as the OP quoted:

So far, at least 150 samples of water from the Oder River have been tested. None of the studies have confirmed the presence of toxic substances. At the same time, we are testing fish. No mercury or other heavy metals have been found in them," she said.
She said some Oder water samples were being sent to foreign laboratories to be tested for about 300 substances.

if it were oxygen-related, i'd be really surprised that wasn't established immediately: they had the weather data, the water samples, the access to plentiful samples of fish flesh.

 

[Rightguide]

as the OP quoted:


if it were oxygen-related, i'd be really surprised that wasn't established immediately: they had the weather data, the water samples, the access to plentiful samples of fish flesh.

Why don't you go ahead and say it, Climate Change!

 

[butters]

Why don't you go ahead and say it, Climate Change!

i have no idea what caused it, just as the scientists didn't at the time of this article's publication.

if it was a cut&dried lack of oxygen due to heat, then i would be one of the first to link it to the heating, especially as its effects on europe right now are awful.

the ENTIRE point of this thread is that scientists were yet to establish cause... and that's a concern.

 

[Rightguide]

i have no idea what caused it, just as the scientists didn't at the time of this article's publication.

if it was a cut&dried lack of oxygen due to heat, then i would be one of the first to link it to the heating, especially as its effects on europe right now are awful.

the ENTIRE point of this thread is that scientists were yet to establish cause... and that's a concern.

The fact is fish kills are a fact of nature, a possible cause for concern, but not out of the ordinary.