Fig. 6From: What evidence exists for temporal variability in Arctic terrestrial and freshwater biodiversity throughout the Holocene? A systematic map protocolGraph representation of Arctic biodiversity (the Population P for the PECO used within this systematic map protocol). A study timeline may contain information about biodiversity through a a biotic proxy inferred as a botanical or other taxon (e.g., pollen morphotype identified as a genus), or b a biotic proxy not linked to a taxon (e.g., pollen morphotype only). The combination of three factors—proxy, inference method, and taxon—unique to a particular study timeline are conceptualised as a ‘proxied taxon’ using a tripleBack to article page