Title: Constancy and cover of plants in the Petersburg and Wrangell Districts, Tongass National Forest and associated private and other public lands, southeast Alaska.
Author: Mead, Bert R.;
Source: Res. Pap. PNW-RP-540. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 112 p
Publication Series: Research Paper (RP)
Description: This study provides a comprehensive and inclusive description and inventory of the vegetation within the Stikine area of southeast Alaska. Private and other public lands were included as well as Tongass National Forest lands contained in the Petersburg and Wrangell Ranger Districts. Previous inventories have concentrated almost exclusively on tree species within forest lands. There has been recent recognition, however, that forest management plans must incorporate detailed information on other vegetation and resources. During an information needs assessment, prior to the inventory, Tongass National Forest managers requested that data be collected on all plant species. This information would feed into vegetation databases to be used by forest managers for various purposes but would be collected by using the same method and in one format for the entire Tongass National Forest.
Constancy and foliar cover tables are presented for the Stikine area of the Tongass National Forest and adjacent private and other public lands of southeast Alaska. The methods used to estimate occurrence in the area are described and discussed. Average cover and constancy value for each sampled species of tree, shrub, grass, forb, lichen, and moss in 18 forest and 12 nonforest Alaska vegetation classification system level IV vegetation types is shown.
Vegetation classification was attempted by using the preliminary forest plant associations of the Stikine area of the Tongass National Forest. Only a small percentage of the plots fit neatly into this classification system. Because the plots were located systematically, many plots did not fall into average or typical plant-association series descriptions. We discovered that we could not obtain tree cover by species using the four 7.43-radius subplots, making the first-level branches of the plant association key borderline between several associations, and a correct placement was not possible.
Keywords: Alaska, southeast, foliar cover, species constancy, inventory, plant ecology, Stikine, Wrangell, Kake, Petersburg, Tongass, Zaremo, Kuiu, Kupreanof, Etolin, Cleveland Peninsula, temperate rain forest, Alaska vegetation classification system, species composition
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Mead, Bert R. 2002. Constancy and cover of plants in the Petersburg and Wrangell Districts, Tongass National Forest and associated private and other public lands, southeast Alaska. Res. Pap. PNW-RP-540. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 112 p
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