Photograph-based seed cone counts of white spruce (Picea glauca) trees from treeline field sites across the Brooks Range, Alaska 2019-2022

• Main Authors: Colin Maher, Patrick Sullivan, Roman Dial, Rebecca Hewitt
• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2023
• Subjects: Picea glauca; white spruce; Brooks Range; treeline; cone production; reproduction; seed cones; Arctic treeline; Arctic; Wind River; The Cones; Timber Lake; Firth River; Timber Creek; Climate change; Alaska
• Online Access: https://doi.org/10.18739/A2NS0M02D

Photograph-derived counts of seed cones on white spruce (Picea glauca) trees at elevational (alpine) & lower (arctic) treelines at 19 research sites along a west-east gradient in Alaska's Brooks Range. Photographs are from a single angle and thus represent a "cone production index" rather than a complete count of all the cones on a tree. The general purpose of the sampling was to examine west-east variation in white spruce growth and reproduction responses to changes in climatic gradients and ongoing climate change.