Fluvial runoff fluctuations regulate downstream estuarine nitrogen transformations along land-to-sea continuum - Xiuli Yan; Yue Wang; Xinzun Huang; Xinyan Yang; Ehui Tan; Junwen Wu; Nengwang Chen; Bangqin Huang; Weidong Guo; Shuh-Ji Kao (Journal of Hydrology, 2026)