Climate change may be harming the carbon-capturing capabilities of Earth's forests.
The researchers suspect that's linked to climate change: Over that same period the vapor pressure deficit — a measure of how quickly the air robs plants of moisture — increased in this region., in which it plays the "role of a sledgehammer," study authors Sean McMahon and David Bauman of the Smithsonian Environmental Resource Center tell Axios in an email.
"Our study indicates that climate in general, and VPD in particular, need to be understood not simply physiologically, but how different species differ in their vulnerability to this stress," they said.to trees by wildfires, drought and insect outbreaks through the end of the 21st century may be pervasive, especially in the western U.S.
But it's an open question whether photosynthesis or the expansion and division of cells that make up wood drives tree growth.from thousands of trees in the U.S. and Europe and measures of changes in CO2 in the air that are a proxy for photosynthesis, Anderegg and his colleagues tried to answer that question. If rates of photosynthesis and tree growth increased or decreased at the same time, it would point to photosynthesis as the driving force.
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