On the Ecology of Mountainous Forests in a Changing Climate: A ...

Appendix 253
VI. Derivation of parameters for eastern North American tree
species
The 14 species-specific parameters were derived according to the following conversion
rules for the 72 most important tree species of eastern North America (Pastor & Post
1985, Solomon 1986), which are used in the FORENA model:
sType parameter:
The sType parameter was derived from the parameters FWT (a foliage production
parameter), SLTA (an allometric parameter), and FRT (the foliage retention time in years)
of the 72 tree species given in Pastor & Post (1985, pp. 30ff.). These three parameters
determine the amount of foliage weight per tree in function of its diameter at breast
height. There are 9 combinations of values for these three parameters in the data set by
Pastor & Post (1985). They were mapped to the five types of allometric relationships
between DBH and foliage weight in FORCLIM as indicated in Eq. A-2.
D1
D2
( FWT = 248 ∧ SLTA = 0.804 ∧ FRT = 1 ) ∨
( FWT = 173 ∧ SLTA = 0.729 ∧ FRT = 1 )
( FWT = 440 ∧ SLTA = 0.804 ∧ FRT = 1 ) ∨
( FWT = 440 ∧ SLTA = 0.814 ∧ FRT = 1 ) ∨
( FWT = 440 ∧ SLTA = 0.428 ∧ FRT = 1 )
C3 ( FWT = 248 ∧ SLTA = 0.804 ∧ FRT = 3 )
sType =
(A-2)
C4 ( FWT = 440 ∧ SLTA = 0.804 ∧ FRT = 2 )
D4 ( FWT = 440 ∧ SLTA = 0.904 ∧ FRT = 1 )
C5 ( FWT = 440 ∧ SLTA = 0.804 ∧ FRT = 3 )
kDm, kHm, kAm, and kDrT parameters:
The FORENA and FORCLIM parameters kDm, kHm, kAm, and kDrT are identical.