High Resolution Estimates of Spruce-Site-Suitability in Maine

Precision silvicultural applications require baseline estimates
of site productivity and species-specific factors
that may limit occurrence or influence growth. In Maine,
native spruce species (red spruce-Picea rubens, white
spruce-Picea glauca, and black spruce-Picea mariana) are
commonly managed for commodity production, wildlife
habitat, and non-timber income. Yet, each species requires
specific environmental settings that parallel silvics
and functional traits for survival and optimal growth.
While it is acknowledged that matching Picea spp. with
site-specific growing conditions may effectively increase
survival and realized productivity, little work has been
conducted at a resolution compatible with management
activities (i.e., within-stand). The goal of this project
was to integrate climate data, remote sensing products,
and publicly available field data to develop highresolution
predictive mapping systems of species-sitesuitability
for native spruce species across Maine.