• [2013-12-24] Drivers of leaf-out phenology and their implications for species invasions: insights from Thoreau's Concord
  + http://www.futurity.org/thoreaus-walden-warming-leafing-weeks-earlier/ + http://www.bu.edu/news/2014/01/13/walden-trees-leafing-out-far-earlier-than-in-thoreaus-time/ + http://primacklab.blogspot.com/ + https://docs.google.com/file/d/0B05KETqlwfNmdnRhTHF3QTNzYkU/edit?pli=1
  in Tietoukka Monitor > 2013 > 2013-52 with invasive_species leafing massachusetts phenology thoreau winter_chilling_requirements woody_plants

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