Plant interactions associated with a directional shift in the richness range size relationship during the Glacial-Holocene transition in the Arctic

Ying Liu, Simeon Lisovski, Jérémy Courtin, Kathleen R. Stoof-Leichsenring and Ulrike Herzschuh (ulrike.herzschuh@awi.de)
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Ying Liu: Polar Terrestrial Environmental Systems
Simeon Lisovski: Polar Terrestrial Environmental Systems
Jérémy Courtin: Polar Terrestrial Environmental Systems
Kathleen R. Stoof-Leichsenring: Polar Terrestrial Environmental Systems
Ulrike Herzschuh: Polar Terrestrial Environmental Systems

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract A nearly ubiquitous negative relationship between taxonomic richness and mean range-size (average area of taxa) is observed across space. However, the complexity of the mechanism limits its applicability for conservation or range prediction. We explore whether the relationship holds over time, and whether plant speciation, environmental heterogeneity, or plant interactions are major factors of the relationship within northeast Siberia and Alaska. By analysing sedimentary ancient DNA from seven lakes, we reconstruct plant richness, biotic environmental heterogeneity, and mean range-size over the last 30,000 years. We find positive richness to range-size relationships during the glacial period, shifting to negative during the interglacial period. Our results indicate neither speciation nor environmental heterogeneity is the principal driver. Network analyses show more positive interactions during the glacial period, which may contribute to positive richness to range-size relationships. Conversely, in the interglacial environment, negative interactions may result in negative relationships. Our findings suggest potential susceptibility to invasion but conservation advantages in far northern tundra given their positive interactions.

Date: 2025
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DOI: 10.1038/s41467-025-56176-3

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