AUTHOR=Sun Qian-hang , Li Jiang-nan , Zhou Chun-he , Lei Kun , Jiang Wei-jun TITLE=Source analysis of nitrogen pollution in basin by export coefficient modeling and microbial source tracking with mutual verification JOURNAL=Frontiers in Marine Science VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2025.1527098 DOI=10.3389/fmars.2025.1527098 ISSN=2296-7745