Arctic‐Boreal Bryophyte Dynamics Since the Last Glacial Inferred From Ancient DNA Metabarcoding

作者：Ulrike Herzschuh, Ying Liu, Sisi Liu, Kathleen R. Stoof‐Leichsenring, Philipp Porada, Jérémy Courtin, Luca Zsofia Farkas, Thomas Böhmer, Boris K. Biskaborn, Bernhard Diekmann, Yongsong Huang, Darrell S. Kaufman, Martin Melles, Hanno Meyer, Luidmila A. Pestryakova, James M. Russell, Bernd Wagner · 发表于：Journal of Biogeography · 年份：2025 · DOI：10.1111/jbi.70015 · 被引用次数：5 · 研究领域：Bryophyte Studies and Records、Peatlands and Wetlands Ecology、Environmental DNA in Biodiversity Studies

ABSTRACT Aim This study investigates the main changes in bryophyte diversity and composition during the last 30,000 years in arctic and boreal ecosystems. Turnover in biological and ecological trait compositions of recorded bryophytes is assessed to explore changes in dominant life‐strategies and habitats. Location The study area covers Siberia and Alaska (55°–90° N, 50°–150° E and 40°–90° N, 150° E‐140° W). Taxon Bryophytes. Methods We leveraged a dataset of plant DNA metabarcoding (chloroplast, trn L) of sedimentary ancient DNA from 26 lake sediment cores. Our statistical analyses only target DNA reads assigned to bryophytes. Results A total of 120 amplicon sequence variants were obtained, which could be assigned 100% to bryophyte taxa. Our results indicate that the dominant families in the palaeo‐record reflect well the dominant families observed in Siberia and Alaska, and compositional changes reflect mainly the modern latitudinal gradient. For example, Sphagnum shows a clear post‐glacial expansion pattern. Richness was high in times of high habitat diversity. Our data reveal a turnover from biological traits characteristic of an r‐strategy (colonists/short‐lived, small size, monoicous, long sporophyte season, small spores) during the glacial towards a K‐strategy (long‐lived, large size, dioicous, short sporophyte season, large spores) during the Holocene. The ecological traits indicate a shift towards taxa with a preference for high summer temperature, forested habitats,...