Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (941 KB)

Title: Predicting long-term forest development following hemlock mortality

Author: Jenkins, Jennifer C.; Canham, Charles D.; Barten, Paul K.;

Date: 2000

Source: In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 62-75.

Publication Series: General Technical Report (GTR)

   Note: This article is part of a larger document. View the larger document

Description: The hemlock woolly adelgid (Adelges tsugae Annand.), an introduced pest specializing on eastern hemlock (Tsuga canadensis (L.) Carr.), threatens to cause widespread hemlock mortality in New England forests. In this study, we used a stem-based model of forest dynamics (SORTIE) to predict forest development in a northeastern forest both with and without eastern hemlock. In all simulations, forest development was explained by species-specific life-history characteristics such as growth, mortality, and recruitment as they relate to light availability. Forest composition after 500 years depended on the relative abundances of late-successional species: eastern hemlock was long-lived but did not easily gain or yield space; American beech (Fagus grandifolia Ehrh.) gained dominance quickly and soon comprised nearly all basal area in a stand unless hemlock was present; and yellow birch (Betula alleghaniensis Britton) persisted if beech and hemlock were absent. Early-successional species thrived in the forest if late-successional species were not present. We conclude that the long-term impact of the hemlock woolly adelgid on forest composition in northeastern forests will depend both on initial species composition and on the extent of hemlock death. If 50% of the overstory basal area in hemlock is removed by the adelgid, and if the adelgid does not persist at densities high enough to cause extended damage, hemlock stands will continue to be dominated by hemlock. Mixed hemlock-hardwood stands will be dominated by the late-successional species remaining. If hemlock death is near 90% of overstory basal area, hemlock is likely to continue to persist in low densities while the other late-successional species gain dominance. If hemlock death is complete, all stands will be dominated by beech and yellow birch where they are present, no matter what their initial abundances. Hardwood stands will not be affected by the adelgid.

Publication Notes:

  • 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, shobrla@fs.fed.us if you notice any errors which make this publication unusable.

XML: View XML

Citation:


Jenkins, Jennifer C.; Canham, Charles D.; Barten, Paul K. 2000. Predicting long-term forest development following hemlock mortality. In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 62-75.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.