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USFS Logo Research Data Archive
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White spruce stand with dominats 13 to 17 inches d.b.h., height 85 to 100 feet, age 150 years. Permafrost, if present, more than 42 inches below the surface. Adjacent to O'Brien Creek, about 12 miles above its junction with the Fortymile River.
more info/bigger image
Collection: Pacific Northwest Research Station, Alaska Image Archive
Keywords: plant ecology: ecosystems
vegetation types, ecotypes
Location: Alaska; O'Brien Creek
Description: White spruce stand with dominats 13 to 17 inches d.b.h., height 85 to 100 feet, age 150 years. Permafrost, if present, more than 42 inches below the surface. Adjacent to O'Brien Creek, about 12 miles above its junction with the Fortymile River.
Date: 1957

White spruce-paper birch forest about 120 years old. The spruce with the aluminum holder at the base is 21.3 inches d.b.h. On well-drained land near Kasilof, Kenai Peninsula.
more info/bigger image
Collection: Pacific Northwest Research Station, Alaska Image Archive
Keywords: plant ecology: ecosystems
vegetation types, ecotypes
Location: Alaska; Kenai Peninsula; Kasilof
Description: White spruce-paper birch forest about 120 years old. The spruce with the aluminum holder at the base is 21.3 inches d.b.h. On well-drained land near Kasilof, Kenai Peninsula.
Date: 1957

White spruce forest on a 22 per cent slope, S 45 degrees W exposure. Dominants are 10 to 16 inches d.b.h., 70 to 90 feet in height, and 150-180 years old. South Fork of the Fortymile River.
more info/bigger image
Collection: Pacific Northwest Research Station, Alaska Image Archive
Keywords: plant ecology: ecosystems
vegetation types, ecotypes
Location: Alaska; Fortymile River
Description: White spruce forest on a 22 per cent slope, S 45 degrees W exposure. Dominants are 10 to 16 inches d.b.h., 70 to 90 feet in height, and 150-180 years old. South Fork of the Fortymile River.
Date: 1957

https://www.fs.usda.gov/rds/imagedb/results?collection=Pacific+Northwest+Research+Station%2C+Alaska+Image+Archive&keyword%5B0%5D=plant+ecology%3A+ecosystems&photog%5B0%5D=Lutz%2C+Harold+J.&place%5B%5D=Alaska&year%5B0%5D=1957