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

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

doi:10.1007/s10530-008-9270-x

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

Informally Refereed

Authors:

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

Year:

2008

Type:

Other

Station:

Northern Research Station

DOI:

https://doi.org/10.1007/s10530-008-9270-x

Source:

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.

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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.