Grenier and Nelson Chapter 19 Inland Habitat Associations in Oregon 



Appendix 1 Variables used to describe Marbled Murrelet occupied sites using data from Oregon 's Depart- 

 ment of Forestry OSCUR database. Note that the 1, 2, and 3 assigned to DBH are reversed compared to federal 

 lands database 



DBH1 Average diameter (centimeters) at breast height (1.4 m) for the dominant species 



BA1 Basal area (m 2 /hectare) for dominant species 



MBFAC1 Cubic meters per hectare of dominant species ' 



DBH2 Average diameter (centimeters) at breast height (1.4 m) for the codominant species 



BA2 Basal area (m 2 /hectare) for codominant species 



MBFAC2 Cubic meters per hectare of codominant species 



DBH3 Average diameter (centimeters) at breast height (1.4 m) for other species (midstory) 



BA3 Basal area (m 2 /hectare) for other species 



MBFAC3 Cubic meters per hectare of other species 



DBH4 Average diameter (centimeters) at breast height (1.4 m) for other species (understory) 



BA4 Basal area (m 2 /hectare) for other species 



MBFAC4 Cubic meters per hectare of other species 



TPH15 -- - Trees per hectare in the 15.2-20.3 cm d.b.h. class 



TPH20 Trees per hectare in the 20.3-25.4 cm d.b.h. class 



TPH25 - - Trees per hectare in the 25.4-30.5 cm d.b.h. class 

 TPH30 - - Trees per hectare in the 30.5-35.6 cm d.b.h. class 



TPH36 Trees per hectare in the 35.6-45.7 cm d.b.h. class 



TPH46 Trees per hectare in the 45.7-66.0 cm d.b.h. class 



TPH66 Trees per hectare in the 66.0+ cm d.b.h. class 



AGE1993 Age of the tree type calculated from 1993; age was estimated from several large trees in each plot. 



CDBH Average diameter (centimeters) at breast height (1.4 m) for conifers 



HDBH Average diameter (centimeters) at breast height (1.4 m) for hardwoods 



CTPH Trees per hectare for conifers 



HTPH Trees per hectare for hardwoods 



CBA Basal area (m 2 /hectare) for conifers 



HBA Basal area (m 2 /hectare) for hardwoods 



CMBFAC Cubic meters per hectare of conifers 



HMBFAC Cubic meters per hectare of hardwoods 



1 1,000 board feet = 5.83 m 3 /hectare (ha) 



202 



USDA Forest Service Gen. Tech. Rep. PSW-152. 1995. 



