Nature CommunicationsMicrobial drivers of ammonium accumulation in Holocene sediments of the Pearl River DeltaMeiqing LuJiu Jimmy JiaoXin LuoXiaoyuan FengWenzhao LiangShengchao YuYanling QiZhanghua WangHailong LiMeng Li2026-05-05Full textDOI https://doi.org/10.1038/s41467-026-72058-8