If you’re shopping for a live Christmas tree this year, you may have to search harder than in the past. Over the last five years Christmas tree shortages have been reported in many parts of the U.S.

If you’re shopping for a live Christmas tree this year, you may have to search harder than in the past. Over the last five years, Christmas tree shortages have been reported in many parts of the U.S.

Journal of Biogeography, Vol. 42, No. 8 (August 2015), pp. 1443-1454 (12 pages) Aim: Phylogeographical signatures of past population fragmentation and demographic change have been reported in several ...

• Background Many tropical forest tree species delay greening their leaves until full expansion. This strategy is thought to provide newly flushing leaves with protection against damage by herbivores ...

If you’re shopping for a live Christmas tree this year, you may have to search harder than in the past. Over the last five years Christmas tree shortages have been reported in many parts of the U.S.

James Robert Farmer has collaborated with the Indiana Christmas Tree Growers Association on research concerning u-cut/real Christmas trees. He received funding from the Indiana State Department of ...