You are here: Home
/ Publication Information
Title: A practical modification of horizontal line sampling for snag and cavity tree inventory
Author: Ducey, M. J.; Jordan, G. J.; Gove, J. H.; Valentine, H. T.
Source: Canadian Journal of Forest Research 32:1217-1224
Publication Series: Scientific Journal (JRNL)
Description: Snags and cavity trees are important structural features in forests, but they are often sparsely distributed, making efficient inventories problematic. We present a straightforward modification of horizontal line sampling designed to facilitate inventory of these features while remaining compatible with commonly employed sampling methods for the living overstory. The method is simpler in its implementation than traditional horizontal line sampling. We develop unbiased estimators and present methods for dealing with special cases, including boundary overlap. A field test of the method shows it to have time efficiency comparable with or better than ordinary prism cruising, and it requires far fewer sample locations to achieve similar confidence limits. The method may also be useful for inventorying other rare or unusual trees.
- 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.
- This publication may be available in hard copy. 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, firstname.lastname@example.org if you notice any errors which make this publication unusable.
XML: View XML
Ducey, M. J.; Jordan, G. J.; Gove, J. H.; Valentine, H. T. 2002. A practical modification of horizontal line sampling for snag and cavity tree inventory. Canadian Journal of Forest Research 32:1217-1224
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility