Drought can stress trees to death, but heat’s effects are less known. New research could hold the keys to protecting conifer forests. (via highcountrynews)
“All of our trees are drought-stressed,” Oregon state entomologist Christine Buhl toldlast July. “They can’t protect themselves against other agents” in their weakened state. Even common pests and native parasites that don’t normally kill trees are now proving lethal.
“Just like our skin, when rips those cells apart and we have blisters and sunburn, it does the same exact thing to those needles and leaves,” said Danny DePinte, a forest health specialist who flies annual aerial surveys for the U.S. Forest Service in Washington and Oregon.
On his 2022 survey flights, DePinte found that the most obvious damage seems to have been temporary: Damaged areas are mostly green again with new growth. Further research, by Still’s team and others, will investigate possible lingering health effects, including whether the trees become more susceptible to pests, disease and death.
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