DecAID - Decayed Wood Advisor

Down Wood Diameter -

A table and a figure may be displayed on this screen: the small table on the left shows a summary of the forest inventory data, and the graph on the right show wildlife use data. Note that the right hand column in the inventory table does not add to 100% because plots may be counted in more than one size class. Below, the “Underlying Wildlife Data” button will display values in cm and in, sample size, and the number of studies for each data point. For use of other buttons, see the DecAID Tutorial.

Some figures include data from all subregions within the wildlife habitat type. Also, for some graphs the data for Small/Medium Trees and Larger Trees structural condition classes are identical if data were collected in both structural condition classes; these figures and the underlying data tables are labeled with "S/L".

Underlying Wildlife Data

Table WLCH_WCO_L.inv-2. Distribution of down wood sizes on unharvested forest inventory plots (n=22) in the WLCH_WCO_L Vegetation Condition.

Down wood diameter (cm)	% down wood (> 12.5 cm) in size class¹	% of area with down wood in size class²
< 12.5²	N/A	0
12.5 - 24.9	6	81
25 - 49.9	36	100
50 - 99.9	49	86
> 100	8	31

¹Column total may not equal 100% due to rounding errors.
²Down wood less than 12.5 cm in diameter was not measured in the forest inventory plots, therefore the value in the first row reflects % of plot-sized areas with no down wood, and/or % of plot-sized areas where all down wood is < 12.5 cm diameter.

[Graph:] Grap of cumulative species curve for down wood diameter.

NOTE: All but the 5 data points for the cumulative species curves are stand average values. The top values which

are in bold, italics and underlined (i.e. species code) are for individual logs the species were found associated with.

All stand average data is from the same study on the Umpqua National Forest (Maguire unpublished data).