You are here: Home
/ Publication Information
Title: Can cover data be used as a surrogate for seedling counts in regeneration stocking evaluations in northern hardwood forests?
Author: Ristau, Todd E.; Stout, Susan L.;
Source: Res. Note NRS-198. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 10 p.
Publication Series: Research Note (RN)
Description: Assessment of regeneration can be time-consuming and costly. Often, foresters look for ways to minimize the cost of doing inventories. One potential method to reduce time required on a plot is use of percent cover data rather than seedling count data to determine stocking. Robust linear regression analysis was used in this report to predict seedling count data from percent cover data based on 3,800 plots on which both count and cover data were collected. Results showed very poor relationships of cover data to seedling counts overall. The weakest relationships were found in plots that had received a shelterwood seed cut without any other regeneration preparation in the past. The better relationship came from plots where competition was reduced through herbicide application and shelterwood seed cutting. Immediately following herbicide application, when total seedling numbers were lowest, the relationship of cover to counts was best, with r-squared values as high as 0.8 for black birch, and between 0.4 and 0.6 for the smallest black cherry and red maple. These numbers quickly declined as seedlings developed. Cover data cannot reliably serve as a surrogate for seedling counts.
Keywords: cover data, SILVAH, Allegheny hardwood, regeneration stocking
- 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
Ristau, Todd E.; Stout, Susan L. 2014. Can cover data be used as a surrogate for seedling counts in regeneration stocking evaluations in northern hardwood forests?. Res. Note NRS-198. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 10 p.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility