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Indicator E.a. - Maps and Data for the Report on the East Cascades North Mapping Region
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Article Content
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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.
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| Figure 22. Forest type based on dominant species |
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Map Legend and Data for Figure 22
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Dominant Species
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Hectares (Acres) x 1000
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Percent of Total
Forested Area
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 Ponderosa pine |
203 (501)
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50
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 Douglas-fir |
100 (249)
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25
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 Oregon white oak |
27 (67)
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7
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 Juniper |
22 (55)
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5
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 White fir |
21 (51)
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5
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 Grand fir |
11(28)
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3
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 Lodgepole pine |
6 (16)
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2
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 Incense-cedar |
3 (8)
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1
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 Other species |
4 (10)
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1
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 Regenerating forest |
7 (18)
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1.8
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Printable map and data file [jpg; 362 KB]
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| Figure 23. Six categories of size classes. |
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Map Legend and Data for Figure 23
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| Size Class |
Hectares (Acres) x 1000
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Percent of Total
Forested Area
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 Shrub/Seedling
QMDA_DOM <2.5 or CANCOV <10
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7 (18)
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1.8
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 Sapling/Pole
QMDA_DOM <=2.5 and <25.0
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168 (414)
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41.3
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 Small tree
QMDA_DOM <=25.0 and <37.5
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128 (317)
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31.6
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Medium tree
QMDA_DOM <=37.5 and <50.0
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78 (193)
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19.2
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 Large tree
QMDA_DOM <=50.0 and <75.0
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32 (80)
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0.8
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Giant tree
QMDA_DOM >=75.0
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0.08 (0.2)
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0.02
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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. |
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*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.
Printable chart [jpg; 55 KB]
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| Figure 25. Percent canopy cover of all live trees. |
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Map Legend and Data for Figure 25
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| Canopy Cover Class |
Hectares (Acres) x 1000
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Percent of Total
Forested Area
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Less than 10%
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35 (85)
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8.5
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10% to 40%
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143 (352)
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35.1
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 40% to 70%
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175 (431)
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43.0
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Greater than 70%
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54 (134)
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13.4
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Printable map and data file [jpg; 333 KB]
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| Table 7. Summary statistics of the diversity of forest types. |
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| Species |
Average
Percent
Canopy
Cover
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Area
Hectares (Acres)
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Percent
of Total
Forest Area
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Number of
Forest
Subtypes
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| Ponderosa pine |
38
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202,697 (500,876)
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50
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11
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| Douglas-fir |
66
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100,615 (248,624)
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25
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13
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| Oregon white oak |
39
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27,271 (67,388)
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7
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2
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| Juniper |
10
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22,197 (54,850)
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5
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1
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| White fir |
60
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20,786 (51,353)
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5
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5
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| Grand fir |
69
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11,240 (27,775)
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3
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3
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| Lodgepole pine |
52
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6,278 (15,512)
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2
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8
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| Incense-cedar |
30
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3,415 (8,349)
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1
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1
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| Noble fir |
72
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1,430 (3,534)
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0.4
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3
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| Subalpine fir |
81
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1,244 (3,073)
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0.3
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3
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| Mountain mahogany |
83
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777 (1,919)
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0.2
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5
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| Western hemlock |
81
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207 (512)
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0.05
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4
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| Engelmann spruce |
61
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180 (444)
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0.04
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2
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| Black cottonwood |
86
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174 (429)
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0.04
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1
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| Pacific silver fir |
79
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118 (290)
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0.03
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5
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