Publication Details

Using dendrochronology to model hemlock woolly adelgid effects on eastern hemlock growth and vulnerability

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Rentch, James; Fajvan, Mary Ann; Evans, Richard; Onken, Brad

Year Published

2008

Publication

In: Onken, Brad; Reardon, Richard, comps. Fourth Symposium on hemlock woolly adelgid in the eastern United States; 2008 February 12-14; Hartford, CT. FHTET 2008-01. Morgantown, WV: U.S. Forest Service, Forest Health Technology Enterprise Team: 177.

Abstract

This study examined the relationship between eastern hemlock (Tsuga canadensis (L.) Carr.) crown condition and changes in radial growth associated with infestation by hemlock woolly adelgid (HWA), Adelges tsugae (Hemiptera: Adelgidae). Tree-ring chronologies of eastern hemlock were used to develop a binomial decline index based on three consecutive years of below-average growth. Radial growth decline was modeled using logistic regression as a function of an extensive array of tree, crown, and site variables that were collected over an 11-year period in Delaware Water Gap National Recreation Area.

Citation

Rentch, James; Fajvan, Mary Ann; Evans, Richard; Onken, Brad. 2008. Using dendrochronology to model hemlock woolly adelgid effects on eastern hemlock growth and vulnerability. In: Onken, Brad; Reardon, Richard, comps. Fourth Symposium on hemlock woolly adelgid in the eastern United States; 2008 February 12-14; Hartford, CT. FHTET 2008-01. Morgantown, WV: U.S. Forest Service, Forest Health Technology Enterprise Team: 177.

Last updated on: June 11, 2010