• Osawa, Akira
  School of Forestry and Environmental Studies, Yale University
  
• Spies, Charles J III.
  Entomology Department, University of Maine
  
• Dimond, John B.
  Entomology Department, University of Maine
  

A forest inventory of Baxter State Park, Maine was done during the summer and fall of 1983 to study the patterns of mortality in balsam fir (abies balsamea (L) and in the red-black spruce complex (Picea rubens Sarg., P. Mariana (Mill.) BSP. and their hybrids) during an uncontrolled spruce budworm outbreak.In total, 6,953,000 m3 (186 m3/ha) of living trees were present, excluding the ones in hardwood forests. Spruce was the most abundant species with 61% of the total stem volume. The volume of tress that died during the outbreak was estimated as 4,647,000 m3 (125 m3/ha); 40% of the original quantity dead stem volume was 2, 570, 000 m3 (68.9 m3/ha) for fir and 1,560,000 m3 (41.8 m3/ha) for spruce. They correspond to 77% and 27% of the original stem volumes in fir and in spruce, respectively.