Canary in the coal mine – big trees

The researchers suspect that climate change is the biggest culprit and that big trees are acting as the ‘canary in the coalmine’ for the effects of global warming on the world’s forests. Big trees are more susceptible to high temperatures and water shortages than smaller trees.

“Older, larger trees are declining because of disease, drought, logging and other factors, but what stands out is that this decline is statewide,” said lead author Patrick McIntyre, of the University of California in Berkeley.
The Independent 22 Jan 2015