John A Young (Former Employee)
Science and Products
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Use of multi-date Landsat TM imagery to map Eastern hemlock (Tsuga canadensis) decline due to hemlock woolly adelgid (Adelges tsugae) in Shenandoah National Park Use of multi-date Landsat TM imagery to map Eastern hemlock (Tsuga canadensis) decline due to hemlock woolly adelgid (Adelges tsugae) in Shenandoah National Park
No abstract available.
Authors
David Morton, John Young, Nissa Thomsen
Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area
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...
Authors
David Lemarie, John Young, Craig Snyder, Robert Ross, David Smith, Randy M. Bennett
Hemlock stands contribute significantly to aquatic biodiversity Delaware Water Gap National Recreation Area Hemlock stands contribute significantly to aquatic biodiversity Delaware Water Gap National Recreation Area
No abstract available.
Authors
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
Combining landsat thematic mapper imagery with terrain variables to map eastern hemlock (Tsuga canadensis) in Shenandoah National Park Combining landsat thematic mapper imagery with terrain variables to map eastern hemlock (Tsuga canadensis) in Shenandoah National Park
No abstract available at this time
Authors
D.D. Morton, J.A. Young, N.M. Thomsen
Assessment of landscape correlates of Eastern hemlock decline due to hemlock woolly adelgid Assessment of landscape correlates of Eastern hemlock decline due to hemlock woolly adelgid
Eastern hemlock (Tsuga canadensis) is in decline throughout its range in the eastern US due to infestation by an exotic insect pest, the hemlock woolly adelgid (Adelges tsugae). In Shenandoah National Park, the hemlock woolly adelgid (HWA) rapidly killed many stands of hemlock after first appearing in the late-1980’s, while having only minor impact in other stands. At present, few...
Authors
John Young, Craig Snyder, James Akerson, Gary Hunt
Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area
No abstract available.
Authors
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
A landscape-level analysis of marbled murrelet habitat in western Washington A landscape-level analysis of marbled murrelet habitat in western Washington
No abstract available at this time
Authors
M.G. Raphael, J.A. Young, B.M. Galleher
Non-USGS Publications**
Mahan, C. G. and J. A. Young. 2018. Natural resource condition assessment: New River Gorge National River. Technical Report NPS/NERI/NRR—2018/1622.
Mahan, C. G., and J. A. Young. 2016. Fredericksburg and Spotsylvania National Military Park Natural Resource Condition Assessment. Natural Resource Report NPS/NERO/NRR—2016/1252. National Park Service, Fort Collins, Colorado
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 24
No Result Found
Filter Total Items: 55
Use of multi-date Landsat TM imagery to map Eastern hemlock (Tsuga canadensis) decline due to hemlock woolly adelgid (Adelges tsugae) in Shenandoah National Park Use of multi-date Landsat TM imagery to map Eastern hemlock (Tsuga canadensis) decline due to hemlock woolly adelgid (Adelges tsugae) in Shenandoah National Park
No abstract available.
Authors
David Morton, John Young, Nissa Thomsen
Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area Relationship of Eastern hemlock (Tsuga canadensis) to the ecology of small streams in Delaware Water Gap National Recreation Area
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...
Authors
David Lemarie, John Young, Craig Snyder, Robert Ross, David Smith, Randy M. Bennett
Hemlock stands contribute significantly to aquatic biodiversity Delaware Water Gap National Recreation Area Hemlock stands contribute significantly to aquatic biodiversity Delaware Water Gap National Recreation Area
No abstract available.
Authors
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
Combining landsat thematic mapper imagery with terrain variables to map eastern hemlock (Tsuga canadensis) in Shenandoah National Park Combining landsat thematic mapper imagery with terrain variables to map eastern hemlock (Tsuga canadensis) in Shenandoah National Park
No abstract available at this time
Authors
D.D. Morton, J.A. Young, N.M. Thomsen
Assessment of landscape correlates of Eastern hemlock decline due to hemlock woolly adelgid Assessment of landscape correlates of Eastern hemlock decline due to hemlock woolly adelgid
Eastern hemlock (Tsuga canadensis) is in decline throughout its range in the eastern US due to infestation by an exotic insect pest, the hemlock woolly adelgid (Adelges tsugae). In Shenandoah National Park, the hemlock woolly adelgid (HWA) rapidly killed many stands of hemlock after first appearing in the late-1980’s, while having only minor impact in other stands. At present, few...
Authors
John Young, Craig Snyder, James Akerson, Gary Hunt
Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area Potential effects of pathogen-induced hemlock forest decline on aquatic biodiversity in Delaware Water Gap National Recreation Area
No abstract available.
Authors
C.D. Snyder, J.A. Young, D. Lemarie, D. R. Smith, R. Ross, R. Bennett
A landscape-level analysis of marbled murrelet habitat in western Washington A landscape-level analysis of marbled murrelet habitat in western Washington
No abstract available at this time
Authors
M.G. Raphael, J.A. Young, B.M. Galleher
Non-USGS Publications**
Mahan, C. G. and J. A. Young. 2018. Natural resource condition assessment: New River Gorge National River. Technical Report NPS/NERI/NRR—2018/1622.
Mahan, C. G., and J. A. Young. 2016. Fredericksburg and Spotsylvania National Military Park Natural Resource Condition Assessment. Natural Resource Report NPS/NERO/NRR—2016/1252. National Park Service, Fort Collins, Colorado
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government