Ontogenic changes rather than difference in temperature cause understory trees to leaf out earlier

In case you missed it, Lizzie Wolkovich mentioned this study by Yann Vitasse just before we got started with lab meeting this week. Take home?

This study demonstrates that later leaf emergence of canopy trees compared with understory trees results from ontogenic changes and not from the vertical thermal profile that exists within forests. This study warns against the assumption that phenological data obtained in warming and photoperiod experiments on juvenile trees can be used for the prediction of forest response to climate warming.