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Indicator E.a. - Maps and Data for the Report on the West Cascades Mapping Region
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Article Content
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Figure 2. Forest type based on dominant species.
Figure 3. Size classes.
Figure 4. Amount of forested area in each size class by dominant tree species.
Figure 5. Percent canopy cover of all live trees.
Table 2. Summary statistics of the diversity of forest types.
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| Figure 2. Forest type based on dominant species. |
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Map Legend and Data for Figure 2
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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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 Douglas-fir |
1620 (4003)
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59.84
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 Mountain hemlock |
248 (612)
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9.16
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 Western hemlock |
186 (459)
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6.86
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 White fir |
121 (299)
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4.47
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 Lodgepole pine |
118 (292)
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4.37
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 Pacific silver fir |
96 (238)
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3.56
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 Shasta red fir |
80 (199)
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2.97
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 Ponderosa pine |
50 (124)
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1.86
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 Western redcedar |
33 (81)
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1.22
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 Noble fir |
31 (77)
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1.15
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 Other species |
123 (304)
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4.50
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 Regenerating forest |
42 (103)
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1.51
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Printable map and data file [jpg; 495 KB]
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| Figure 3. Size classes. |
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Map Legend and Data for Figure 3
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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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43 (106)
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1.5
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 Sapling/Pole
QMDA_DOM <=2.5 and <25.0
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693 (1711)
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24.0
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 Small tree
QMDA_DOM <=25.0 and <37.5
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625 (1544)
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21.6
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Medium tree
QMDA_DOM <=37.5 and <50.0
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451 (1115)
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15.6
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 Large tree
QMDA_DOM <=50.0 and <75.0
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673 (1663)
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23.2
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Giant tree
QMDA_DOM >=75.0
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264 (652)
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9.1
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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; 500 KB]
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| Figure 4. 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; 58 KB]
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| Figure 5. Percent canopy cover of all live trees. |
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Map Legend and Data for Figure 5
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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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80 (199)
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2.9
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10% to 40%
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211 (522)
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7.7
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40% to 70%
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646 (1597)
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23.5
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Greater than 70%
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1810 (4474)
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65.9
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Printable map and data file [jpg; 448 KB]
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| Table 2. 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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| Douglas-fir |
70.14
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1,619,921 (4,002,912)
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59.84
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32
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| Mountain hemlock |
84.38
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247,860 (612,476)
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9.16
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12
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| Western hemlock |
78.87
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185,691 (458,853)
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6.86
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9
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| White fir |
60.88
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120,920 (298,800)
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4.47
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15
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| Lodgepole pine |
51.77
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118,190 (292,054)
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4.37
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11
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| Pacific silver fir |
82.16
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96,360 (238,112)
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3.56
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11
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| Shasta red fir |
73.95
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80,336 (198,516)
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2.97
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8
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| Ponderosa pine |
42.15
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50,350 (124,419)
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1.86
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15
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| Western redcedar |
74.13
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32,936 (81,387)
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1.22
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7
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| Noble fir |
68.45
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31,180 (77,046)
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1.15
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8
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| Red alder |
35.35
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23,709 (58,586)
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0.88
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7
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| Bigleaf maple |
26.57
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17,286 (42,716)
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0.64
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4
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| Incense-cedar |
53.30
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16,735 (41,353)
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0.62
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9
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| Grand fir |
69.88
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16,220 (40,080)
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0.60
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5
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| Engelmann spruce |
61.53
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10,282 (25,408)
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0.38
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5
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| Oregon white oak |
7.91
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7,896 (19,512)
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0.29
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6
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| Subalpine fir |
73.23
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6,274 (15,504)
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0.23
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5
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| Pacific madrone |
26.10
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5,927 (14,647)
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0.22
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6
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| Giant chinquapin |
29.68
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5,025 (12,416)
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0.19
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3
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| California black oak |
17.46
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4,174 (10,314)
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0.15
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6
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| Western white pine |
16.16
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2,392 (5,910)
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0.09
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2
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| Aspen |
20.74
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2,237 (5,529)
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0.08
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1
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| Knobcone pine |
21.60
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1,683 (4,158)
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0.06
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1
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| Sugar pine |
66.76
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1,272 (3,142)
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0.05
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3
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| Pacific yew |
33.06
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968 (2,391)
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0.04
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1
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| Willow |
00.01
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655 (1,619)
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0.02
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1
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| Black cottonwood |
72.77
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508 (1,255)
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0.02
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1
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