Skip to comments.Scientists: Global warming may be killing trees in West twice as fast
Posted on 01/22/2009 2:40:13 PM PST by NormsRevenge
Trees in old-growth forests of the western United States are dying at twice the usual rate, and scientists say climate change may be to blame.
In one of the largest-ever surveys of U.S. forests, ecologists analyzed data on nearly 60,000 trees in 76 old-growth forests. Set to be published Friday in the journal Science, the study reported a startling jump over the past few decades: regardless of type, size or elevation, twice as many trees are dying each year.
And while death rates have increased, birth rates for new trees have remained stable meaning there aren't enough new trees to replace the old ones.
For now, the percentage of trees dying each year is small, so doubling the rate means an increase of only 1 or 2 percent per year. But over time, small increases can add up, said Dr. Phillip van Mantgem, U.S. Geological Survey researcher and co-leader of the research team.
"If current trends continue, forests will become sparser over time," van Mantgem said. "Simple projections of forest stand structure indicate that average tree age will eventually decrease by half, and this will potentially lead to decreasing average tree size."
Sparser forests provide fewer places for animals to live, van Mantgem said, and also put trees at-risk for sudden die-off from catastrophic incidents such as fire, drought and bark beetle attack.
In addition, because large trees absorb significant amounts of carbon dioxide, death of old-growth forests could further exacerbate climate change.
The study analyzed data collected since 1955, from forests across California, the Pacific Northwest and several Rocky Mountain states.
(Excerpt) Read more at mercurynews.com ...
Why can’t global warming kill these scientists ?
Same people were blaming the same problem on acid rain a few years ago.
Why cant global warming kill these scientists ?”
Roaches are very hard to kill.
Well....I can tell ya that ice storms sure kill a lot of them.....that don’t sound warm to me.
Click on POGW graphic for full GW rundown
Ping me if you find one I've missed.
Before long, these scientists will be proclaiming global warming are killing baby boomers. Between x year, theres a sharp decrease in human population. How could that be? Must be because of global warming
Fake science for a fake cause/religion. Father AlGore of the Church of GlobusWarmus hath proclaimed it so. The trees portend doom. The rabbits with the mean nasty teeth shall smite us. We shall have to resort to the Holy Hand Grenade of Antioch.
But, they have carefully examined EVERY other possible variable and global warming is the only possible cause. NOT.
These folks are producing Obama-output.
Twice as fast as what?
The NY Times kills millions of trees per year printing their left wing propaganda - ditto for most lib papers. This hopefully will end soon.
Old growth forest contain a large number of old trees.
The older things get, the greater the liklihood of death.
So if these trees all got their start long ago, we could be seeing the upper limit of tree longevity.
The greens see Old Growth Forests as sacred, but I don’t think they are immortal.
Actually, they are freezing to death.
I’ve planted well over 100 trees on my own property and my family has close to 25 acres in a set-aside Tree Farm.
And, I sell trees to others for a living.
I’ve done my part to ‘save the planet.’ I just read yesterday that we have 70 million MORE acres in ‘trees’ than we did when the Pilgrims first got here. Most of it’s gone back to woodland and prairie and wetland as we get more efficient in producing food and need LESS farmland.
They can just p*ss off. :)
...or more likely not.
This report is garbage. I think what is happening is that bark beetles are killing these trees. This is because of poor forest management. This poor forest management is because of the lawsuits initiated by environmental groups who claim they are trying to save the forests. More garbage mainstream media journalism.
Look at this site, it contains some interesting data that shows this is a bunch of crap. There has been no warming in the north west in the last 22 yrs
in other news the country is in a deep freeze even here in FL where we have had minus temps.
Don’t these people realise now that they are making themselves look rather silly a bit like those who refused to think the world was round or you kill people and get 72 virgins, o wait????????
Its the shock of a sudden change from global warming to global cooling back to global warming back to global cooling or otherwise total nonsense!
Women, minority trees hardest hit.
Global warming has been appointed to always be the cause of EVERYTHING bad until proven otherwise....and event then, sometimes, they won’t let go.
Hog wash on multiple levels.
The one that stands out to me is the CO2 claims. Old trees grow slower than younger trees. Basic forestry management calls for cutting out mature trees to maximize wood output. Old trees dying will increase CO2 uptake.
Also seedling sprouting is based on area. Thousands die for every old growth tree seen. Because the old tree dies does not mean an increase in seedlings, that is maxed out already.
Note the trees are dying in the West only. No metion of clear cutting rain forests in brazil or indonesia. The trees are just dying in the west.
Let the NY Times, LA Times, Wa Po, NewsWeak, and Tiume magazine go broke faster and at least 3 million trees a year will be saved.
They’re most likely dieing off because they tend to live immoral lives.
Ok, we don't act on "may" - call back when you know for sure. To act otherwise would be reckless.
For now, the percentage of trees dying each year is small, so doubling the rate means an increase of only 1 or 2 percent per year.
Ok, I see now. It sounds better (ie. more alarming) to say the rate has doubled. Never mind that it is a very small rate, and small fluctuations make for large percentage changes. These guys are useless.
Sounds like lumber prices should be dropping then.
More warmth and CO2 is killing trees??????? Do they even think about this stuff?
Put "climate change" or "global warming" on a grant request, get government funding, blame man-made climate change for [fill in the blank]. We have too many scientists chasing grant money.
“....But, they have carefully examined EVERY other possible variable and global warming is the only possible cause. NOT.
These folks are producing Obama-output....”
Reminds me of the “Acid rain” is killing all the frogs rant....until the virus responsible was identified.
We live in an era where anything bad be it real, imaginary or yet to be known, is because of global warming.
Yes, even global cooling.
The leftists are so ‘worried’ about ‘birth and death’ rates for trees..yet don’t care about the ‘death’ of babies being killed before they are even ‘birthed’
These people are insane and dangerous!
So much is wrong with this...where do I start?
How about this line:
“And while death rates have increased,
birth rates for new trees have remained stable
meaning there aren’t enough new trees to replace the old ones.”
First, trying to get beyond using the phrase “birth rate” for trees...
Well, thousands of seeds die or are eaten for every one that finds a suitable growth environment and sprouts. And of the ones that sprout, hundreds are trampled or eaten or otherwise killed for every one that survives. And for those that manage to survive, the biggest killer of a young struggling sapling is the shade produced by the older mature trees. So actually, if the older trees go bye-bye, the younger trees have a better chance to survive.
Ya want to know what damages a tree? It is from the salt that has to be put on the roads because of the massive SNOW STORMS....
A tree problem??
Must be Bush’s fault.
Scientists? Names please!
1,000,000 tons of barf!
Trees are dying from beetle infestation, and that is caused by not harvesting enough trees to open up the forest to sun light. If the bark is heated by the sun, fewer beetle eggs survive, and less damage is done to trees.
Old growth trees die because they are old. That makes sense, what doesn’t make sense is that he thinks old growth forest have a lot of wild life. They don’t because there is not much for animals to eat. Animals like to live on the edge of forest where they can browse on the brush and grass in the fields and go back into the forest to hide. When an old tree dies and falls over, it becomes a nursery for seedlings so that is a good thing. I am not a game biologist and I didn’t sleep in a Holiday Inn last night but I have followed a hunter around the woods and fields for 51 years and I have learned stuff.
So opening up the forest makes it more fire prone????
These guys are insane.
There are two things that are totally useless to listen to:
a drunk’s story of his divorce and the latest pronouncement of science on the harm caused by global warming, but the first is more interesting than the second.
But I heard that they did not care to call it global warming anymore on account of all the record cold weather. I heard they were changing it to “Climate Change”.
They guys are all a bunch of scam artists. Power and money is all it is about. The American people need to just tell them to shut up already.
The bark beetle is killing trees.
My grandmother lived to be 98. My grandmother drank tea every day.
Thus, tea is why my grandmother lived to be 98.
Same logic, same stupidity. Back in the 70s trees were dying from acid rain. Once they proved Acid rain didn’t really exist they kind of dropped the whole subject.
Mr. Horsted used historical pictures, some taken by the photographer with Custer's 1874 Expedition, thne meticulously found the EXACT spots, and dupilicated the camera angles and fields of view for a maodern view; then published them side by side in a coffe table book.
Be sure to read the caption on this:
But we aren’t talking about them dying naturally, we’re talking about cutting them down. Longevity is therefore not a factor.
Besides who cares? I’ll be dead long before this becomes a real big problem, and future generations will get used to no trees just like we’ve gotten used to no buffalos running around the neighborhood.
It’s not junk science but junk math.
No where is the percentage stated. I get the percentage increase to be less than 1/2 of 1%. So even if its doubled, it’s less than 1 %.
“For now, the percentage of trees dying each year is small, so doubling the rate means an increase of only 1 or 2 percent per year.”
Pacafic Decadal Oscillation was in WARM phase most of those years! PDO just switched to cool phase!!!!
PDO COOL Phase:
October-March Northwestern North America and Great Lakes precipitation..above average
Northwestern North American spring time snow pack...above average
Winter and spring time flood risk in the Pacific Northwest...ABOVE AVERAGE!!!!