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Author Ristau, Todd E.

Title Can cover data be used as a surrogate for seedling counts in regeneration stocking evaluations in northern hardwood forests? [electronic resource] / Todd E. Ristau, Susan L. Stout.

Imprint Newtown Square, PA : U.S. Dept. of Agriculture, Forest Service, Northern Research Station, [2014]

Copies

Location Call No. OPAC Message Status
 Axe Federal Documents Online  A 13.79:NRS-198    ---  Available
Description 1 online resource (10 pages) : illustrations.
text txt rdacontent
computer c rdamedia
online resource cr rdacarrier
Series Research note NRS ; 198
Research note NRS ; 198.
Note Title from Web page (viewed on Sept. 22, 2014).
"April 2014."
Bibliography Includes bibliographical references (pages 9-10).
Summary 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.
Subject Forests and forestry -- Measurement.
Hardwoods -- Seedlings -- Counting.
Reforestation -- Evaluation.
Added Author Stout, Susan L. (Susan Laurane)
United States. Forest Service. Northern Research Station.
Other Form: Print version: Ristau, Todd E. Can cover data be used as a surrogate for seedling counts in regeneration stocking evaluations in northern hardwood forests? (OCoLC)891139975
Gpo Item No. 0083-B-46 (online)
Sudoc No. A 13.79:NRS-198

 
    
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