QUOTE
Rising temperatures fueled by global warming are causing forests of spruce trees to invade Arctic tundra faster than scientists originally thought, evicting and endangering the species that dwell there and only there, a new study concludes.
Tundra is land area where tree growth is inhibited by low temperatures and a short growing season. In the Arctic, the tundra is dominated by permafrost, a layer of permanently frozen subsoil.
The only vegetation that can grow in such conditions are grasses, mosses and lichens. Forests of spruce trees and shrubs neighbor these tundra areas, and the boundary where they meet is called the treeline.
In summer, the permafrost thaws, and the tundra becomes covered in bogs and lakes, allowing a unique habitat for plants. Climate change, meanwhile, has extended the summer warming season and promoted tree growth, causing the treeline to encroach on the tundra.
By looking at tree rings, researchers reconstructed a 300-year history of tree density and treeline position. The results show trees can creep up on the tundra faster than previously thought.
“The conventional thinking on treeline dynamics has been that advances are very slow because conditions are so harsh at these high latitudes and altitudes,” said Ryan Danby of the University of Alberta. “But what our data indicates is that there was an upslope surge of trees in response to warmer temperatures. Its like it waited until conditions were right and then it decided to get up and run, not just walk.”
While in many places the idea of more trees is a good one, this Arctic takeover endangers species like caribou and sheep that thrive in the tundra, as well as the native people who depend on these species for their survival.
The details of the study are published in the March issue of the Journal of Ecology. Danby plans to continue his research as a part of the International Polar Year research effort.
Tundra is land area where tree growth is inhibited by low temperatures and a short growing season. In the Arctic, the tundra is dominated by permafrost, a layer of permanently frozen subsoil.
The only vegetation that can grow in such conditions are grasses, mosses and lichens. Forests of spruce trees and shrubs neighbor these tundra areas, and the boundary where they meet is called the treeline.
In summer, the permafrost thaws, and the tundra becomes covered in bogs and lakes, allowing a unique habitat for plants. Climate change, meanwhile, has extended the summer warming season and promoted tree growth, causing the treeline to encroach on the tundra.
By looking at tree rings, researchers reconstructed a 300-year history of tree density and treeline position. The results show trees can creep up on the tundra faster than previously thought.
“The conventional thinking on treeline dynamics has been that advances are very slow because conditions are so harsh at these high latitudes and altitudes,” said Ryan Danby of the University of Alberta. “But what our data indicates is that there was an upslope surge of trees in response to warmer temperatures. Its like it waited until conditions were right and then it decided to get up and run, not just walk.”
While in many places the idea of more trees is a good one, this Arctic takeover endangers species like caribou and sheep that thrive in the tundra, as well as the native people who depend on these species for their survival.
The details of the study are published in the March issue of the Journal of Ecology. Danby plans to continue his research as a part of the International Polar Year research effort.
*sighs*
Now, I don't care anymore why it's happening. Who's involvement is making it worse, or how many people are saying this is fake.
Truly, this is evidence that the earth is trying to compensate for something that it's loseing in many places elsewheres in the world. The globe *is* getting warmer... areas are becoming deserts and losing trees from droughts and well in the case of the Amazon (one of the main places we get that lovely oxygen we need to live!) man caused. So while the earth keeps getting warmer, and we're sitting here on our thumbs pointing fingers, it'll keep on doing what it always does to compensate for things that are being lost.
I really don't know why people would rather argue about this anymore. I've given up on the matter of who's to blame. Because the blame game's over. Now it's time to figure out how we can live with this huge change. And it's not a slow change either. Living the same way we've been living is not going to work for much longer. We will need different energy sources. And they are right infront of our noses, all which works with nature not against.
But, I know my words will fall on deaf ears, and the cries from them will be to call me a tree hugging hippie *points to title*. But you know what... I ain't the hippie of yesteryore protesting and doing whatever they did in the 60's. I guess you could say, being a shaman has let me notice things that most people won't even listen to.
The huge snowstorms that this country had? Why did it happen if the globe is warming? Because it was warm enough to snow like that. Snow only happens through a slim corridore of temprature. 34-29 F. (give or take a degree either way) And these places that got burried in snow are *normaly* below the 29 mark... where it's to cold to snow. And with a storm like that allowed to dump it's load down, it was able to grow big enough to reach areas that snow hardly ever happens. That's a problem.
Now trees are growing where trees hadn't for centuries.. Now yes, trees had been up in the polar tundra area before... When warm shallow seas covered most the globe. See where I'm going here? (Not that I wouldn't mind living near a warm shallow sea *snickers*)
But, like I said.. the blame game is over. We all will lose if we don't adjust. We can't stop it, no. But that's still not an excuse to do nothing and continue to burn fossil fuel. It's a reason to adapt, learn different ways to live with the enviroment, and learn how to live with sources of energy that will be only avalible to us when the planet changes enough that makes useing fossil fuels next to impossible. We want the human raise to survive? Well it's time to use this "Intelligence" that people like to say we have and find a way to adapt.
