Niche differentiation drives microbial community assembly in an anaerobic/oxic/anoxic-aerobic granular sludge (AOA-AGS) system: Insights into Anammox self-enrichment - Jingwei Ma; Hui Sun; Yaning Ji; Qiulai He; Long Chen; Ying Han; Peng Bi; Liang Zhu (Water Research, 2026)