Seasonal oxygen deficiency reveals carbon–nitrogen decoupling and dissolved-nitrogen accumulation in a coastal sea - Xiao Chen; Xin Guo; Xiaobo Zhao; Xinyue Pang; Yeping Liu; Minghao Zhu; Liwen Zheng; Changfei He; Yubin Hu; Junfu Dong; Jihua Liu (Marine Environmental Research, 2026)