In a study published Tuesday in the journal Proceedings of the Royal Society B, researchers describe how night-time light pollution is causing early budburst—emergence of new leaves on a tree—in four common types of British tree: ash, oak, sycamore and beech. The researchers based their findings on data collected by citizen scientists and satellite imagery giving information on levels of light pollution in areas across the UK.
“For the last 13 years, a bunch of citizen scientist have been noting the time at which four common tree species come into budburst,”Richard ffrench-Constant, paper co-author and an entomologist at the University of Exeter, told me. “We found that budburst correlates with the amount of artificial light in an area.”

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