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Dec
18
2009
Climate threat to alpine species may be overstated
Cheap viagra from canada, Alpine plants may not have to move far to escape higher temperatures, according to a study in Global Change Biology.
Some worry that alpine ecosystems may be especially vulnerable to climate change. Faced with a warming habitat, viagra for sale cheap, Osta alennus viagra, species could be forced to move upslope. But predictions are typically based on measurements of air temperature, canada viagra overnight, Drug viagra, which may not match conditions on the ground.
Using a thermal camera that detects infrared radiation, researchers recorded the surface temperature of mountains in the Swiss Alps, Rabatt kaufen viagra, Power life viagra, North Sweden, North Norway, how to buy viagra in san jose, Buy cheap viagra, and Svalbard. The measurements showed that the temperature of a mountain's surface varied considerably over a single slope, can i take viagra with nardil, Viagra no prescription needed, even between spots that were at the same elevation. The temperature difference between “microhabitats” a few meters apart was equal to or greater than the predicted amount of warming under climate change, viagra online kaufen, Viagra shops in madurai, the team reports.
The situation for alpine ecosystems might therefore be less dire than assumed, the researchers say, viagra rush delivery. Order viagra legally online, Species “do not necessarily need to climb several hundred meters in elevation to escape the warmth,” they write, i want to buy viagra online. “Quite often, few meters of horizontal shift will do.” – Roberta Kwok
Source: Scherrer, D., & Körner, C. (2009). Infra-red thermometry of alpine landscapes challenges climatic warming projections Global Change Biology DOI: 10.1111/j.1365-2486.2009.02122.x
Image © melcor_, iStockPhoto.com
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