Glacier-fed river systems threatened by climate change

Glacial meltwater increases biodiversity in mountainous freshwater ecosystems. As glaciers vanish due to global warming, so will those species dependent upon the icy runoff. This is the conclusion of a study authored by researchers from, among other institutions, the University of Copenhagen.

The article "Glacial river biodiversity" with the alarming new findings can be found in the journal Nature .

"The knowledge is new and startling. Glacial runoff is cold, nutrient-poor and physically unstable, and therefore, typically species-poor. Traditionally, we have not attached great significance to these ecosystems within the context of local or regional biodiversity," states Associate Professor Dean Jacobsen of the Freshwater Biology Section at the University of Copenhagen's Department of Biology. Jacobsen is one of the study's authors.

Jacobsen and his European colleagues are the first to research ecology and mountain macroinvertebrates, primarily found in tropical glacial streams. In the recent study, researchers compiled and analysed data from analogous regions located on three continents and predicted the consequences of the global retreat and disappearance of glaciers.

One-third of species threatened

The research results clearly demonstrate that the greatest number of freshwater macroinvertebrates are encountered in mountain streams where glacial runoff contributes to the streams' total volume of water. The study also finds that if glaciers were to vanish entirely, we could expect to lose between 11 and 38 percent of a region's total macroinvertebrate species. The expected losses would be particularly high for species, which have adapted to the unique and otherwise challenging living conditions of glacial streams.

Jacobsen emphasises, "That of insects such as chironomids (non-biting midges), crane flies and stoneflies could disappear. The wiping out of these invertebrates and others would be much more extensive than once supposed and with unknown consequences for the functioning of the ecosystem."

Glacier-fed streams are one of several stream types which together create a mosaic of ecosystems. Each system has its own environmental characteristics anf unique living conditions.


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Mar 16, 2012
I talked to my brother in Kentucky and he told me that this winter was the warmest he has ever seen. There was no snow. Only rain. That is odd, it snows every year there. The observation is this; if global warming causes this much change in so little time, 20 years out this is going to be really nasty. As you said VD; 200 years out. the WORLD is wiped out!

Mar 16, 2012
Newsflash:

World bubblegum supply threatened by climate change!

Rare unicorn tap-dancing studio and training grounds threatened by climate change!

Eskimos forced to turn vegetarian due to climate change!

Inuit continue to strongly dislike being called "Eskimos", despite climate change!

Why, unless we cede all authority, property, and wealth to a global climate protectorate made up of the best and brightest of our climate scientists, it will be fire and brimstone coming down from the skies! Rivers and seas boiling! Forty years of darkness! Earthquakes, volcanoes... The dead rising from the grave! Human sacrifice, dogs and cats living together... mass hysteria!

(With deep apologies to Messrs Stantz, Spengler, Zeddemore, and Venkman)

Mar 16, 2012
Rivers and seas boiling! Forty years of darkness! Earthquakes, volcanoes... The dead rising from the grave! Human sacrifice, dogs and cats living together... mass hysteria!


Oh yeah, Itchieguy HAD TO MORPH. Anyone feel like a party?

Mar 17, 2012
Getting out my Ghost Busters DVD ;)

Nice to see shelgeyr is a member of the Tea Party cult mind think network.

Mar 17, 2012
Neither Howhot's nor MarkyMark's comments seem to make much sense, but I guess it is better to be "a member of the Tea Party cult mind think network" than to be a mindless leftist.

Of course, that's obvious to anyone with a working brain.

Mar 17, 2012
I talked to my brother in Kentucky and he told me that this winter was the warmest he has ever seen. There was no snow. Only rain. That is odd, it snows every year there. The observation is this; if global warming causes this much change in so little time, 20 years out this is going to be really nasty. As you said VD; 200 years out. the WORLD is wiped out!

If humans keep spitting out all these greenhouses gasses than yes.
But maybe not, just imagine all the droughts and floods and storms we have now, if in 20 years these become more and more energetic over time, a large portion of population will be wiped out. Than in turn the planet may recover slowly. We can compare humans to a culture of bacteria, dying in its own waste, finding the equilibrium point.

Mar 17, 2012
Behold! Kassinees reveals itself to be a typical mindless leftist eliminationist.

OK, that's not such a newsflash after all.

...if in 20 years these become more and more energetic over time, a large portion of population will be wiped out. Than(sic) in turn the planet may recover slowly.


"Recover" in what sense? The planet is fine, and doesn't care what we do.

Mar 17, 2012
Behold! Kassinees reveals itself to be a typical mindless leftist eliminationist.

Exactly what am I eliminating? Society is eliminating itself and I want to prevent that. Contradictory to people like you.

"Recover" in what sense? The planet is fine, and doesn't care what we do.

Are you serious?

Mar 17, 2012
Are you serious?

Totally! The Earth is fine. You should get out more. Maybe travel a bit. Even an area like the Tamanrasset can be quite lovely at times.

Mar 17, 2012
You have to remember that Vendicar is a deeply disturbed troll whose only means of validation is to annoy others.

He sits alone - desperately alone - furiously repeating his limited selection of insults and spurious fragments of insanity, sometimes even wishing death upon his ideological betters (defined as "other people"), and when someone finally responds directly he throws up his arms in triumph, shouting "Yes! I pissed someone off! They noticed me! I MATTER!"

He's been doing this for YEARS. Here, and on other boards.

It is all he CAN do.

Yes, Vendicar, you can smile with smug self-satisfaction now. Despite your being wrong about pretty much everything, and in fact more than "despite", it is in fact DUE to that, you've been noticed.

Good for you! You're life is now complete. Go have a cookie.

The rest of you leftists would do well to remember: Misery loves company. You identify and side with Vendicar at your own personal and self-inflicted peril.

Mar 17, 2012
Hahahahahahahaha!

I can't believe I overlooked adding the obvious:

"...and then Vendicar logs on with his sock puppets and up-scores his own comments."

You should trademark "Sad & Pathetic", because you've cornered the market*.

(*not that you believe in markets, of course.)

Mar 18, 2012
My error in the past has been to attempt a rational discourse. Of course - having a rational discourse with the witch doctor - is stupid -djr

Indeed it is. Tards cannot be reasoned with. The only thing they understand is:
"Oo ee oo ah ah ting tang walla walla bing bang, Oo ee oo ah ah ting tang walla walla bing bang"!

Mar 18, 2012
CardacianNeverid, at his most eloquent ever, grunted:
"Oo ee oo ah ah ting tang walla walla bing bang, Oo ee oo ah ah ting tang walla walla bing bang"!


What a racist!

Mar 19, 2012
CardacianNeverid, at his most eloquent ever, grunted:
"Oo ee oo ah ah ting tang walla walla bing bang, Oo ee oo ah ah ting tang walla walla bing bang"!

What a racist -ShelShockTard

Eh? What merde are you spreading now tard boy?

Mar 21, 2012
So... let me get this straight. Some scientists went round the world and discovered that some invertebrates prefer to live, but don't live exclusively, in glacial runoff. If the glaciers magically disappear (the glacial mass balance has been increasing science 2003 http://i90.photob...ce.png). Some species could disappear! How 'alarming'. This is definitely "new and starling' speculation!

Mar 21, 2012
@rubberman said:
This is quite possibly the dumbest thing I have read on this forum...

That's because you've swallowed - hook, line, and sinker - so many lies about the environment that you're incapable of recognizing the truth.

In fact you seem to have a violent reaction to the truth, and are so insecure about your position that you feel it necessary to attempt to belittle those you disagree with. You're not very good at it, but it is so CUTE to watch you try!

But that's OK... You're pretty much a troll on the subject, so your opinion is completely predictable, holds no weight, and doesn't really matter.

Cheers!

Mar 21, 2012
Hey @gregor1, apparently the physorg board software doesn't like having a close parenthesis and period at the end of a link, so it automatically screwed up the URL you posted. I'm reposting it here, having removed the ")." that it appended from your sentence.

http://i90.photob...ance.png

Unfortunately, it looks like some other user is WAY too, uh, "slow" to realize that the software can sometimes mess up, and decided to call you a liar. Moreover, they're apparently so "especially gifted" that they never realized that physorg abbreviates the displayed URL, so if one simply copies the displayed link instead of right-clicking and copying the linked target, they'll end up with an even more screwed up link.

I suspect that their demonstrated lack of introspection will prevent them from realizing their error, much less be able to acknowledge it or relay to you a much-deserved apology.

But hey, trolls are like that.

Mar 21, 2012
A very pathetic bottom dweller says
That's because you've swallowed - hook, line, and sinker - so many lies about the environment that you're incapable of recognizing the truth.


I really have to ask you; what Hook? what Line; and What Sinker are you talking about? Science doesn't just toss out a fishing cliches and expect you to believe old long fishing tails. NO SIR!
Science is fact driven. FACT DRIVEN!

So what facts do you know (if any) that can counter what has been widely published and widely accepted as FACT?

Yeah... I thought so... Nada, not a thing. Troll.


Mar 22, 2012
VD_Scott_Nudds (Scott Douglas?) said:
A lie, supported by "Page Not Found"

So now you're lying about what you claimed Gregor was lying about.

Liar.

Mar 22, 2012
Meanwhile here it is - still winter in the Northern Hemisphere and highs for the last month in my area are 15'C higher than historical norms.

No one has ever seen a non-winter like this before.

On 17 MAR 68, the record high in Duluth, MN was 60F.
On 17 MAR 67 the record low was -10F.
16 MAR 68: 56F
15 MAR 68: 57F
1 MAR 90: 52F
26 FEB 76: 58F
25 FEB 76: 59F
22 FEB 61: 60F
13 FEB 97: 64F

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