Nitrogen cycling perturbations and their links to the biological evolution in the Ediacaran Dengying Formation, South China - Kai Wei; Hansheng Cao; Zaiyun Wang; Zhihui An; Fajin Chen; Hanli Huang; Chunqing Chen; Yuda Zeng (Palaeogeography, Palaeoclimatology, Palaeoecology, 2026)