Annual mortality and growth index for 17 tree species across entire size classes in the Ogawa Forest Reserve, an old-growth deciduous forest, central Japan

We estimated demographic parameters across entire size classes for 17 tree species (Betula, Carpinus, Fagus, Quercus, Castanea, Acer, Cerasus, Swida, Kalopanax, and Styrax) using a dataset over 18 years obtained from the Ogawa Forest Reserve, an old-growth deciduous forest located in the southern part of the Abukuma Mountains, Ibaraki Prefecture, central Japan (36° 56', 140° 35', 610 m in elevation) 1). Size classes were represented by 12 categories defined based on age, height, and diameter at breast height (DBH): new seedling (age < 1), aged seedling (age ≥ 1 and height < 30 cm), sapling (height 30 cm to 2 m), juvenile (height ≥ 2 m and DBH < 5 cm), D10 (DBH 5–15 cm, D10 was denoted by the midpoint of this range; later classes were similarly defined), D20, D30, D40, D50, D60, D70, and D80 (including trees with DBH ≥ 85 cm). We derived the annual mortality and growth index (i.e., the probability of a living tree transitioning to the next size class) for each species and size c...