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Site Index of Sitka Spruce Along the Pacific Coast Related to Latitude and Temperatures

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Equations were developed which show that site index (100 years) of Sitka spruce along the North Pacific coast is highly correlated with latitude and mean annual growing degree days. Site decreases approximately 1 m per degree of latitude, averaging about 48 m in Lincoln County, Oregon, and 33 m in northern southeast Alaska. Farther north and west, Yakutat, Prince William Sound, and Kodiak average much lower in site than predicted by latitude or growing degree days. Sitka spruce will grow and reproduce in some areas of the naturally treeless Aleutian Islands but growth there is very slow. Forest Sci. 25:145-153.

Keywords: Picea sitchensis; growth

Document Type: Journal Article

Affiliations: Silviculturist, USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Forestry Sciences Laboratory, Juneau, Alaska

Publication date: 1979-03-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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