Nitrogen cycle perturbations linked to metazoan diversification during the early Cambrian Xu, Dongtao ; Wang, Xinqiang ; Shi, Xiaoying ; Tang, Dongjie ; Zhao, Xiangkuan ; Feng, Lianjun ; Song, Huyue Abstract Publication: Palaeogeography Palaeoclimatology Palaeoecology Pub Date: January 2020 DOI: 10.1016/j.palaeo.2019.109392 Bibcode: 2020PPP...53809392X