The Seedlot Selection Tool (SST)

Posted on: 12/11/2018 - Updated on: 6/05/2023

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The Seedlot Selection Tool (SST) is a web-based mapping application designed to help natural resource managers match seedlots with planting sites based on climatic information.

Because of natural selection to different climatic conditions at a location, plant populations are genetically differentiated from one another and are generally locally adapted. As a result, differences in climates among seedlots reflect differences in adaptation. The SST maps locations where a seedlot matches a planting site assuming the seedlot was locally adapted to the past climate. The climates of the planting sites can be chosen to represent past climates, or future climates based on selected climate change scenarios.

The SST allows the user to control many input parameters, allowing them to explore different assumptions about climate change, how plant populations are adapted to climate, and the risk tolerance of the user. The eight steps described below will provide guidelines to tailor the tool to your specific reforestation or restoration needs.

The Seedlot Selection Tool is a collaboration between the US Forest Service, Oregon State University, and the Conservation Biology Institute.


Dr. Brad St.Clair – Co - Principal Investigator
Research Geneticist, Pacific Northwest Research Station
USDA Forest Service, Corvallis, Oregon, USA
[email protected]

Nikolas Stevenson-Molnar – Lead Developer
Software Engineer
Conservation Biology Institute, Corvallis, Oregon, USA
[email protected]


Dr. Brad St.Clair (Co-Principal Investigator)

Managing Organizations

The U.S. Department of Agriculture Forest Service is a Federal agency that manages public lands in national forests and grasslands. The Forest Service is also the largest forestry research organization in the world, and provides technical and financial assistance to state and private forestry agencies. Gifford Pinchot, the first Chief of the Forest Service, summed up the purpose of the Forest Service—"to provide the greatest amount of good for the greatest amount of people in the long run."

Oregon State is an international public research university that draws people from all 50 states and more than 100 countries. We go wherever the challenges are, push ourselves to the very edge of what’s known and keep going. We are determined to forge solutions. We are diverse and welcoming. We embrace our responsibility to Oregon and the world, building a future that’s smarter, healthier, more prosperous and more just. We see what could be and have worked relentlessly for 150 years to make it so. 

The Conservation Biology Institute (CBI) provides scientific expertise to support the conservation and recovery of biological diversity in its natural state through applied research, education, planning, and community service. We utilize GIS and remote sensing data to conduct assessments and planning in support of conservation projects globally.



Sector Addressed