Skip to Main Content
Distribution of cavity trees in midwesternold-growth and second-growth forestsAuthor(s): Zhaofei Fan; Stephen R. Shifley; Martin A. Spetich; Frank R., III Thompson; David R. Larsen
Source: Canadian Journal of Forest Research 33(8):1481-1494
Publication Series: Scientific Journal (JRNL)
Station: North Central Research Station
PDF: Download Publication (2.29 MB)
DescriptionWe used classification and regression tree analysis to determine the primary variables associated with the occurrence of cavity trees and the hierarchical structure among those variables. We applied that information to develop logistic models predicting cavity tree probability as a function of diameter, species group, and decay class. Inventories of cavity abundance in old-growth hardwood forests in Missouri, Illinois, and Indiana found that 8-11% of snags had at least one visible cavity (as visually detected from the ground; smallest opening !Y2 cm diameter), about twice the percentage for live trees. Five percent of live trees and snags had cavities on mature (!Y110 years) second-growth plots on timberland in Missouri. Because snags accounted for typically no more than 10% of standing trees on any of these sites, 80-85% of cavity trees are living trees. Within the subset of mature and old-growth forests, the presence of cavities was strongly related to tree diameter. Classification and regression tree models indicated that 30 cm diameter at breast height (DBH) was a threshold size useful in distinguishing cavity trees from noncavity trees in the old-growth sample. There were two diameter thresholds in the mature second-growth sample: 18 and 44 cm DBH. Cavity tree probability differed by species group and increased with increasing decay class.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationFan, Zhaofei; Shifley, Stephen R.; Spetich, Martin A.; Thompson, Frank R., III; Larsen, David R. 2003. Distribution of cavity trees in midwesternold-growth and second-growth forests. Canadian Journal of Forest Research 33(8):1481-1494
- Distribution of cavity trees in midwestern old-growth and second-growth forests
- Regional distribution and dynamics of coarse woody debris in Midwestern old-growth forests
- Tree cavity estimation and verification in the Missouri Ozarks
XML: View XML