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. 2021 Mar 15;118(13):e2019069118. doi: 10.1073/pnas.2019069118

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Fig. 4. — Multiproxy evidence for local Betula presence. The downcore trends for dominant woody shrubs Betula and Salicaceae (assumed Salix) based on DNA metabarcoding (diamonds; as presence) and pollen (squares; as percent of total pollen grains). Total pollen concentration (grains per g dry weight of sediment) highlights enhanced biomass in the LIG versus Holocene. The pink and blue shading delineates biostratigraphic units as in Fig. 3. Note the break in the y-axis and that Holocene samples are plotted on age scale while LIG samples are plotted on depth scale.