Trees on the Move
Birds are doing it, now trees are too.
All over the world, trees are moving to new places to escape warmer temperatures. They are taking root at higher elevations as well. But this isn’t happening in response to hot summer temperatures: warmer WINTER temperatures are the cause.
In BBC News, Matt Walker quotes biologist Melanie Harsch as saying, “We expected growing season warming to be the dominant driver, but we found that it was not, winter temperature was.”
Walking outdoors in the fall in Europe, you can enjoy the lovely yellow leaves, while the US and East Asia, the turning leaves are mostly red. What causes the differences in autumn leaves around the world? The answer goes back 35 million years.
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