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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Upper panel: Black cherry raceme with individual flowers. Robert Long, USDA Forest Service
Lower panel: Mature black cherry seed at the base of a tree in fall 2010
ID: 1244
Black cherry regeneration difficulties: Are They Related to Stand Age or Something Else?

Forest managers report that black cherry regeneration is impeded by poor and erratic seed production. Tree stand age has been suggested as one o ...

Principal Investigator : Todd Ristau

Resource Management and Use
Water, Air, and Soil
2017NRS
Photo of This black cherry seedling is infected with black cherry leaf spot. Managers and scientists have observed this infection more frequently in recent years. Robert Long, U.S. Department of Agriculture Forest Service.
ID: 1086
Changes in Black Cherry on the Allegheny Plateau

Increased tree mortality, decreased seed production, and seedling growth. Managers and scientists have been observing these changes in black che ...

Principal Investigator : Todd Ristau

Inventory and Monitoring
Resource Management and Use
Water, Air, and Soil
2016NRS
Photo of Results of herbicide application using different surfactants with glyphosate to control striped maple and American beech. Bars with the same letter are not different at p < 0.05. U.S. Department of Agriculture Forest Service.
ID: 1059
Fine-tuning Herbicide Prescriptions in Northern Hardwood Forests

Fine-tuning existing herbicide prescriptions leads to better results for forest managers and landowners.

Principal Investigator : Todd Ristau

Resource Management and Use2016NRS
Photo of Deer browsing exerts top-down selection on plant communities, which over time ricochets back up the trophic web to affect insects and birds. Forestry Sciences Laboratory, Irvine, PA
ID: 315
Long-Term Differences in Forests With Different Deer Densities

Thirty years after a study on the effects of deer on forest ecosystems established new forest stands at deer densities ranging from 10 to 64 dee ...

Principal Investigator : Todd Ristau

Wildlife and Fish
Resource Management and Use
2011NRS
Photo of Ecoregions of Pennsylvania color-coded by the levels of similarity found between overstory and understory tree species composition in the Pennsylvania Regeneration Study data of 2001-2005. Todd Ristau, USDA Forest Service
ID: 655
Pennsylvania Regeneration Study Assesses Overstory and Understory Tree Species Communities

In 2001, the Commonwealth of Pennsylvania and Forest Service's Forest Inventory & Analysis (FIA) program launched the "Pennsylvania Regeneration ...

Principal Investigator : Todd Ristau

Inventory and Monitoring2014NRS
Photo of One of the common ground beetles Pterostichus melanarius that responded to lepidopteran outbreaks. Todd Ristau, USDA Forest Service
ID: 495
Scientists Study Long-term Response of Ground Beetle Communities to an Operational Herbicide Application

Ground beetles comprise a large and diverse group of mostly predatory beetles that have long been recognized as a useful barometer of ecosystem ...

Principal Investigator : Todd Ristau

Resource Management and Use
Wildlife and Fish
2013NRS
Photo of Photo 1:  Reid Garrison in a regenerating stand where black cherry seedlings are thriving after a nitrogen fertilizer treatment.
Photo 2:  Figures show increased species diversity in fertilizer treated stands.
ID: 1261
Using fertilizer to promote diverse seedling development in Allegheny hardwood forests

Fertilizing the forest understory slows the development of dominance by sweet birch, favors development of black cherry following overstory remo ...

Principal Investigator : Todd Ristau

Resource Management and Use
Water, Air, and Soil
2017NRS