Replication Data for: Ice age refugium shows potential of geohistorical data to guide modern conservation efforts

Manuscript summary: Identifying refugia can provide important insights for conservationists planning protected areas.

However, most current methods for identifying refugia emphasize short-term survivorship during a crisis rather than long-term recovery. Here, we propose a method for identifying refugia that emphasizes range re-expansion, and we present a case study using pollen data from three plant taxa over the past 20 kyr in northern Alaska, USA to evaluate the method’s validity. We identified a substantial decrease and subsequent recovery in spruce presence across the study region between 16.0–11.0 ka and tested the pattern’s significance using a Monte Carlo analysis.