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Northern Research Station
One Gifford Pinchot Drive
Madison, WI 53726
(608) 231-9318
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Forest Disturbance Processes

SILVAH - Non-native Invasive Species

[image:] Data entry screen for SILVAH’s non-native invasive species inventory and information module.Research Issue

In some parts of the eastern mixed hardwood forest, non-native invasive plant species (NNIS) should be a major consideration in any silvicultural treatment plan.  When they are present, even near a stand in which a treatment is planned, they can prevent the realization of the landowner’s goals for the treatment.  Research lags behind this need – we do not know, for many of these species, if there is a threshold of abundance below which certain species need not be a concern, and even the best methods of treatment are not consistently well understood. 

 Our Research

As we have planned to increase our SILVAH training and decision support in Ohio, several of our partners suggested that ignoring NNIS was not an option.  Pending development of better guidelines for recognizing when NNIS are abundant enough to pose a threat to management objectives and treatment options, SILVAH currently provides a format for recording presence absence and frequency data about several NNIS that are important in Ohio and elsewhere in the mixed hardwood forests of the east.  SILVAH flags the presence of such species and encourages users to investigate treatment options for NNIS before undertaking the silvicultural treatments that SILVAH recommends.  For each NNIS, there is short summary of its characteristics and reasons for land owners and managers to consider the species in advance of silvicultural treatments.

Expected Outcomes

We expect this tool to increase awareness among landowners and land managers about NNIS, and we expect to integrate research results from our own work (for example, on Ailanthus) and that of others as they accumulate.

Research Results

SILVAH v. 5.6


Research Participants

Principal Investigators

  • Susan Stout , USDA-Forest Service- Northern Researh Station Research Project Leader and Silviculturist
  • Joanne Rebbeck, USDA Forest Service, Northern Researh Station Research Physiologist
  • Pete Knopp, USDA Forest Service, Northern Researh Station IT Specialist

Research Partners

  • Carlen Emanuel, Partner, The Nature Conservancy of Ohio
  • Rick Miller, Partner, The Ohio Department of Natural Resources, Division of Forestry
  • Cindi Heubner, USDA Forest Service, Northern Researh Station Research Botanist

Last Modified: 10/21/2010