AUTHOR=Mostofa Khan M. G. , Yuan Jie , Yang Xuemei , Mohinuzzaman Mohammad , Liu Cong-Qiang , Senesi Nicola , Senesi Giorgio S. , Vione Davide , Li Si-Liang TITLE=The potential nature of “dark” dissolved organic matter in the biosphere JOURNAL=Frontiers in Earth Science VOLUME=13 YEAR=2025 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2025.1517025 DOI=10.3389/feart.2025.1517025 ISSN=2296-6463