Skip to Main Content
An assessment of canopy stratification and tree species diversity following clearcutting in Central Appalachian hardwoodsAuthor(s): Mark Benjamin Brashears; Mary Ann Fajvan; Thomas M. Schuler
Source: Forest Science. 50(1): 54-64.
Publication Series: Miscellaneous Publication
Station: Northeastern Research Station
PDF: View PDF (1.02 MB)
DescriptionOn high quality growing sites in West Virginia, shade intolerant tree species have increased in importance in third-generation forests following clearcutting. We investigated the effect of tree species canopy position on the Shannon-Weiner Diversity Index (H'), Pielou's evenness index (0, and species richness (S) using a chronosequence of 13 clearcuts. Two to 26 yr after clearcutting, tree species diversity significantly decreased from 2.07 to 1.83, and evenness decreased from 0.80 to 0.71 while species richness was maintained. As the number of years since harvesting increased, the importance value of oaks (Quercus L.), hickories (Carya Nutt.), American beech (Fagus grandifolia Ehrh.), sugar maple (Acer saccharum Marsh.), and black birch (Betula lenta L.) decreased while the importance of yellow-poplar (Liriodendron tulipifera L.) increased. In these mixed-species stands with stratified canopies, species importance in overstory versus understory canopy layers was the best indicator of competitive success during stem exclusion. Second-generation forests that had almost equal representation of overstory sugar maple and yellow-poplar prior to harvesting had 43% yellow-poplar and 13% sugar maple overstory importance 22-26 yr after harvest. Forty-five percent of the dominant crown class stems and 54% of the codominant class were yellowpoplar. While sugar maple was also an important (13%) overstory species overall, it had no dominant and few codominant stems and over 30% importance as overtopped trees and in the understory. As these stands progress through the stem exclusion stage, richness and measures of diversity may continue declining as yellow-poplar basal area increases.
- 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.
CitationBrashears, Mark Benjamin; Fajvan, Mary Ann; Schuler, Thomas M. 2004. An assessment of canopy stratification and tree species diversity following clearcutting in Central Appalachian hardwoods. Forest Science. 50(1): 54-64.
Keywordscanopy structure, yellow-poplar
- Species composition changes under individual tree selection cutting in cove hardwoods
- Effects of uneven-aged and diameter-limit management on West Virginia tree and wood quality
- Comparison of lumber values for Grade-3 hardwood logs from thinnings and mature stands
XML: View XML