Biological components are the living things that shape an ecosystem. A biological factor is any living component that affects another organism, including animals that consume the organism in question, and the living food that the organism consumes. The foundational biological datasets listed below can form the basis of assessments that are comparable across jurisdictions and regions.

Data Type	Information/Examples	Level of Synthesis	Maintenance
NatureServe Range distributions of Birds, Mammals, Pollinators, and Fishes	Information	SR-2	Regular Updates
Biome shifts
Breeding Bird Survey	Information	DO	Regular Updates
Connectivity	Example Data	CO	Active Research
NatureServe Ecological Systems of the United States	Information		Active Research
USGS ReGAP Ecological Systems	Information Example Data	CO	Regular Updates
WWF Ecoregions	Information Example Data	CO	Complete
EPA Ecoregions	Information Example Data	CO	Complete
USFS Ecoregions	Information Example Data	CO	Irregular Updates
Natural Heritage Element Occurrences (multiple states)	Information Request Data	SR-2	Regular Updates
Natural Heritage Data (single state)	Information
Existing Vegetation (cover, height, type)	Information	CO	Regular Updates
Fish Distributions	Information Example Data	DO	Regular Updates
Fish Habitat	Information	SR-2	Irregular Updates
PNW Forest Cover 1930	Information Example Data	SR-2	Complete
Forest Fragmentation	Example Data	CO	Regular Updates
Forest Insect & Disease Damage and Risk	Example Data	CO	Regular Updates
Forest Inventories / Statewide Forest Plans	Information	CO	Irregular Updates
USFS FIA Plots	Information	DO	Regular Updates
National Land Cover Database, General Land Cover	Information Example Data	CO	Regular Updates
Important Bird Areas (IBAs)	Information Example Data	DO,CO	Regular Updates
Intact Natural Landscapes	Example Data	CO	Irregular Updates
Invasive Species	Information	DO,CO	Regular Updates
NatureServe Landscape Condition Model	Information	CO	Active Research
Old-growth Forests	Example Data	DO,SR-1	Active Research
Pre-settlement Vegetation	Information	CO	Complete
Salmon ESUs	Information Example Data	SR-2	Irregular Updates
Species Distributions	Information	SR-2	Active Research
Species Mortality – Roadkill	Information	DO	Regular Updates
State Wildlife Action Plan priorities	Information Example Data	CO	Irregular Updates
TNC ERA Portfolio	Example Data	CO	Irregular Updates
Vertebrate Habitat Models	Information Example Data	CO	Active Research
Wetlands	Information Example Data	CO	Irregular Updates