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Indicator E.a. - Maps and Data for the Report on the East Cascades North Mapping Region
 
Figure 22. Forest type based on dominant species. 
Figure 23. Size classes. 
Figure 24. Amount of forested area in each size class by dominant tree species. 
Figure 25. Percent canopy cover of all live trees. 
Table 7. Summary statistics of the diversity of forest types. 
 
 

Figure 22. Forest type based on dominant species
 
This is a map of the forest types based on dominant species for the East Cascades North mapping region. 
 

Map Legend and Data for Figure 22
Dominant Species
Hectares (Acres) x 1000
Percent of Total
Forested Area
 Ponderosa pine
203 (501)
50
 Douglas-fir 
100 (249)
25
 Oregon white oak 
27 (67)
7
 Juniper
22 (55)
5
White fir
21 (51)
5
Grand fir
11(28)
3
  Lodgepole pine
6 (16)
2
  Incense-cedar
3 (8)
1
Other species
4 (10)
1
 Regenerating forest
7 (18)
1.8
 
 
Printable map and data file [jpg; 362 KB]

 
 
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Figure 23. Six categories of size classes.
 
This is a map displaying six categories of size classes for the East Cascades North Mapping Region. 


 
Map Legend and Data for Figure 23
Size Class
Hectares (Acres) x 1000
Percent of Total
Forested Area
 Shrub/Seedling
QMDA_DOM <2.5 or CANCOV <10
7 (18)
1.8
 Sapling/Pole  
QMDA_DOM <=2.5 and <25.0
168 (414)
41.3
Small tree
QMDA_DOM <=25.0 and <37.5
128 (317)
31.6
Medium tree
QMDA_DOM <=37.5 and <50.0
78 (193)
19.2
Large tree
QMDA_DOM <=50.0 and <75.0
32 (80)
0.8
Giant tree
QMDA_DOM >=75.0
0.08 (0.2)
0.02
 
QMDA_DOM represents the quadratic mean diameter (in centimeters) or the dominent tree species.  CANCOV represents canopy cover estimated from the Forest Vegetation Simulator.
 
 
Printable map and data file [jpg; 309 KB]

 
 
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Figure 24. Amount of forested area in each size class by dominant tree species.
 
Figure 24. This is a bar graph displaying the amount of forested area in each size class by dominant tree species for the East Cascades North Mapping Region. 


*Forest areas represented by the "Other Species" category include red alder, bigleaf maple, incense-cedar, grand fir, Engelmann spruce, Oregon white oak, subalpine fir, Pacific madrone, giant chinquapin, California black oak, western white pine, aspen, knobcone pine, Pacific yew, willow, and black cottonwood.
 
 
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Figure 25. Percent canopy cover of all live trees.
 
This is a map displaying the percent canopy cover of all live trees in the East Cascades North Mapping Region. 
 
 

Map Legend and Data for Figure 25
Canopy Cover Class
Hectares (Acres) x 1000
Percent of Total
Forested Area
 Less than 10%
35 (85)
8.5
 10% to 40%
143 (352)
35.1
 40% to 70%
175 (431)
43.0
 Greater than 70%
54 (134)
13.4
 
 
Printable map and data file [jpg; 333 KB]

 
 
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Table 7. Summary statistics of the diversity of forest types.
 
Species
Average
Percent
Canopy
Cover
Area
Hectares (Acres)
Percent
of Total
Forest Area
Number of
Forest
Subtypes
 Ponderosa pine
38
202,697 (500,876)
50
11
 Douglas-fir
66
100,615 (248,624)
25
13
 Oregon white oak
39
27,271 (67,388)
7
2
 Juniper
10
22,197 (54,850)
5
1
 White fir
60
20,786 (51,353)
5
5
 Grand fir
69
11,240 (27,775)
3
3
Lodgepole pine
52
6,278 (15,512)
2
8
 Incense-cedar
30
3,415 (8,349)
1
1
 Noble fir
72
1,430 (3,534)
0.4
3
 Subalpine fir
81
1,244 (3,073)
0.3
3
 Mountain mahogany
83
777 (1,919)
0.2
5
 Western hemlock
81
207 (512)
0.05
4
 Engelmann spruce
61
180 (444)
0.04
2
 Black cottonwood
86
174 (429)
0.04
1
 Pacific silver fir
79
118 (290)
0.03
5
 
 
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