Relationship of Eastern hemlock (<i>Tsuga canadensis</i>) to the ecology of small streams in Delaware Water Gap National Recreation Area

David P. Lemarie; John A. Young; Craig D. Snyder; Robert M. Ross; David Smith; Randy M. Bennett

Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area

General Technical Report NE-267

By: David P. Lemarie, John A. Young, Craig D. Snyder, Robert M. Ross, David Smith, and Randy M. Bennett

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Abstract

Hemlock ravines in Delaware Water Gap National Recreation Area (DEWA) are highly valued because of their distinctive aesthetic, recreational and ecological qualities. We conducted a comparative study designed to determine the potential long-term consequences to aquatic communities of the suspected transition from hemlock-dominated forests to mixed hardwood forests as a result of hemlock woolly adelgid (HWA; Adelges tsugae) induced mortality. A landscape analysis of DEWA using Geographic Information Systems (GIs) was used to select 14 hemlock and hardwood site-pairs that were similar in topography (i.e., slope, terrain shape, aspect, light levels) and stream size (first or second order) but differed in forest composition. This paired watershed approach provided a powerful means to discern the influence of hemlock forests on stream communities. This study was designed to provide an aquatic perspective on potential losses of biological diversity should hemlock forests die.

Suggested Citation

Lemarie, D.P., Young, J.A., Snyder, C.D., Ross, R.M., Smith, D., Bennett, R., 2000, Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area: General Technical Report NE-267, 1 p.

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Additional publication details
Publication type	Report
Publication Subtype	Federal Government Series
Title	Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area
Series title	General Technical Report
Series number	NE-267
Year Published	2000
Language	English
Publisher	U.S. Forest Service
Publisher location	Washington D.C.
Contributing office(s)	Leetown Science Center
Description	1 p.
Larger Work Type	Report
Larger Work Subtype	Federal Government Series
Larger Work Title	Proceedings: Symposium on sustainable management of hemlock ecosystems in Eastern North America
First page	182
Last page	182
Country	United States
State	New Jersey;Pennsylvania
Other Geospatial	Delaware Water Gap National Recreation Area