New Scientist reports:
They say what doesn’t kill you makes you stronger, but that’s not true for the US’s iconic aspen trees.
They appeared to survive a severe drought between 2000 and 2003, but it is now clear that it fundamentally weakened them. If the same is true for other tree species, climate change may be pushing many forests perilously close to a tipping point.
This is work by Anderegg et al, reported in PNAS: “The roles of hydraulic and carbon stress in a widespread climate-induced forest die-off”