caa a22 4500 445299584 CHVBK 20180317142553.0 cr unu---uuuuu 170323e20100601xx s 000 0 eng 10.1007/s11430-010-0045-8 doi (NATIONALLICENCE)springer-10.1007/s11430-010-0045-8 Ostracod fauna across the Permian-Triassic boundary at Chongyang, Hubei Province, and its implication for the process of the mass extinction [Elektronische Daten] [Hao Liu, YongBiao Wang, AiHua Yuan, Hao Yang, HaiJun Song, SuXin Zhang] Thirty species of 10 ostracod genera were identified from 440 fossil specimens isolated through the hot acetolysis of the rock samples collected across the Permian-Triassic boundary at Chongyang section. Twenty species of 6 genera are found to occur in the limestone of Changxing Formation, and 11 species of 7 genera above the main faunal mass extinction horizon. The ostracod assemblages identified at the Chongyang section are obviously different from those previously reported in the contemporaneous microbialites in Guangxi and Chongqing regions, not only in the ostracod components but also in the abundance of filter-feeding ostracods relative to the deposit-feeding ostracods, an indicator of the oxygen level of the seawater. This spatial difference in ostracod assemblages might reflect the diversity of oceanic environmental conditions after the end-Permian mass extinction. Ostracods disappear at 200 cm below and near the main mass extinction horizon, and on the top of the microbialites, respectively, showing an episodic and gradual collapse process at the Chongyang section. The carbon isotope composition is found to appear at 200 cm below the main mass extinction horizon, indicating the initial deterioration of oceanic environment. Fluctuation of the carbon isotope composition is obviously related with the episodic evolution of ostracod species, but not with the abundance of ostracods. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 ostracod nationallicence microbialite nationallicence Permian-Triassic nationallicence mass extinction nationallicence Chongyang nationallicence Liu Hao Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut Wang YongBiao Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut Yuan AiHua State Key Laboratory of Geological Processes and Mineral Resources, 430074, Wuhan, China aut Yang Hao Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut Song HaiJun Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut Zhang SuXin State Key Laboratory of Geological Processes and Mineral Resources, 430074, Wuhan, China aut Science China Earth Sciences SP Science China Press 53/6(2010-06-01), 810-817 1674-7313 53:6<810 2010 53 11430 https://doi.org/10.1007/s11430-010-0045-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-0045-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Hao Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Wang YongBiao Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Yuan AiHua State Key Laboratory of Geological Processes and Mineral Resources, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Yang Hao Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Song HaiJun Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Zhang SuXin State Key Laboratory of Geological Processes and Mineral Resources, 430074, Wuhan, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/6(2010-06-01), 810-817 1674-7313 53:6<810 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer