| A unit of Lasting Forests
evolving since March 30, 1999 |
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A Total Forest Management Plan
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Wildlife trees are " standing live or dead tree with special characteristics that suggest a strong potential role for the tree in providing food or shelter to wild animals" (cf BC Ministry of Forestry 1995). The cavities in such trees are emphasized elsewhere. The tree on the ground is also emphasized elsewhere. On the ground, the interest is in decomposition and mineral cycling as well as possible contributions of the dead and down tree to desired volumes of coarse woody debris in streams.
Snags have recently been called "legacy trees". The number of snags desired has been hotly debated. Whether any should be present is very much related to the silvicultural system selected. In New Hampshire sustainable forest initiatives, 6 snags per acre is the recommended number with other criteria, namely at least one exceeding 18 inches dbh and 3 exceeding 12 inches dbh. In even age work, one patch of uncut trees per 10 acres is suggested, or about 5 percent of the landscape in large hardwoods that may become snags.
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| The bark-opening sequence in trees leading to insect inhabitants and openings in live trees and snags |
Cavity trees abundance are not likely related to topography variables.
References
Hagan, J.M. and S.L. Grove. 1999. Coarse woody debris. J. Forestry 97(1):6-11
Bull, E.L., C.G. Parks, and T.R Torgerson. (1997) Trees and Logs Important to Wildlife in the Interior ColumbiaRiverBasin. US Dept. of Agriculture, Forest Service. : 3-40.
Harlow, RF. and D.C. Guynn, Jr.(1983) Snag Density in Managed Stands of the South Carolina Coastal Plain. Southern Joumal of Applied Forestry 7 : 224-229.
Mannon, RW., E.C. Meslow, and H.M. Wright. (1980) Use of Snags by Birds in Douglas -fir Forests, Western Oregon. Joumal of Wildlife Management 44 : 787-797.
McComb, W.C., and R L. Rumsey. (1983)Characteristics and Cavity-nesting Bird Use of Picloram Created snags in the Central Appalachians. Southern Journal of Applied Forestry 7 : 34-37.
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Last revision April 30, 2001.