High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China
International audience After the end-Permian mass extinction (EPME), the marine environment was considered extremely toxic, which was mainly due to the anoxic and high-temperature conditions and ocean acidification; thus, the ecosystem contained few organisms. This paper describes a new ostracod fau...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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ftsorbonneuniv:oai:HAL:hal-03019848v1 2024-09-15T18:28:25+00:00 High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China Wan, Junyu Yuan, Aihua Crasquin, S. Jiang, Haishui Yang, Hao Hu, Xia China University of Geosciences Wuhan (CUG) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2019 https://hal.science/hal-03019848 https://hal.science/hal-03019848/document https://hal.science/hal-03019848/file/Wan%20et%20al.2019%2004%2016%20SC.pdf https://doi.org/10.1016/j.palaeo.2019.109349 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2019.109349 hal-03019848 https://hal.science/hal-03019848 https://hal.science/hal-03019848/document https://hal.science/hal-03019848/file/Wan%20et%20al.2019%2004%2016%20SC.pdf doi:10.1016/j.palaeo.2019.109349 info:eu-repo/semantics/OpenAccess ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://hal.science/hal-03019848 Palaeogeography, Palaeoclimatology, Palaeoecology, 2019, 535, pp.109349. ⟨10.1016/j.palaeo.2019.109349⟩ Paleo-Tethys paleoenvironment paleoecology end-Permian mass extinction Ostracod evolution [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2019 ftsorbonneuniv https://doi.org/10.1016/j.palaeo.2019.109349 2024-07-25T23:47:57Z International audience After the end-Permian mass extinction (EPME), the marine environment was considered extremely toxic, which was mainly due to the anoxic and high-temperature conditions and ocean acidification; thus, the ecosystem contained few organisms. This paper describes a new ostracod fauna from the microbialites-bearing Permian-Triassic (P-Tr) strata at Zuodeng, Guangxi, China. One thousand and seventy ostracod specimens were extracted from forty-eight samples. Fifty-three species belonging to fourteen genera were identified. Ostracods, primarily from the Family Bairdiidae, were extremely abundant in the microbialites, which suggests that the ostracods were opportunists able to survive within this special microbial ecosystem with 2 sufficient food and scarce competitors and predators rather than undergoing a rapid and early recovery after the end-Permian mass extinction event. Ostracods present simultaneous Paleozoic and Meso-Cenozoic affinities. The similarities and differences among the ostracod faunas in the microbialites at the P-Tr boundary secctions around the Paleo-Tethys indicate that there was a long-distance dispersion of ostracods. However, the faunas maintained endemism at the specific level. Previous studies have regarded microbialites as whole units, and it is difficult to detect environmental changes within a microbialite interval based on paleoecological groups of (super) families. In this study, high-density sampling was applied to identify changes of abundance, diversity, and composition of assemblages of ostracods. The proportion of five dominant species at the section exhibited an evolutionary trend from the "Bairdia" group to the "Liuzhinia antalyaensis-Bairdiacypris ottomanensis" group. Furthermore, the evolution of the ostracod fauna was divided into six stages according to the changes of dominant species, which indicates that the microbialite environment was not entirely constant but fluctuated during the post-extinction interval. Article in Journal/Newspaper Ocean acidification HAL Sorbonne Université Palaeogeography, Palaeoclimatology, Palaeoecology 535 109349 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
Paleo-Tethys paleoenvironment paleoecology end-Permian mass extinction Ostracod evolution [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDE]Environmental Sciences |
spellingShingle |
Paleo-Tethys paleoenvironment paleoecology end-Permian mass extinction Ostracod evolution [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDE]Environmental Sciences Wan, Junyu Yuan, Aihua Crasquin, S. Jiang, Haishui Yang, Hao Hu, Xia High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China |
topic_facet |
Paleo-Tethys paleoenvironment paleoecology end-Permian mass extinction Ostracod evolution [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDE]Environmental Sciences |
description |
International audience After the end-Permian mass extinction (EPME), the marine environment was considered extremely toxic, which was mainly due to the anoxic and high-temperature conditions and ocean acidification; thus, the ecosystem contained few organisms. This paper describes a new ostracod fauna from the microbialites-bearing Permian-Triassic (P-Tr) strata at Zuodeng, Guangxi, China. One thousand and seventy ostracod specimens were extracted from forty-eight samples. Fifty-three species belonging to fourteen genera were identified. Ostracods, primarily from the Family Bairdiidae, were extremely abundant in the microbialites, which suggests that the ostracods were opportunists able to survive within this special microbial ecosystem with 2 sufficient food and scarce competitors and predators rather than undergoing a rapid and early recovery after the end-Permian mass extinction event. Ostracods present simultaneous Paleozoic and Meso-Cenozoic affinities. The similarities and differences among the ostracod faunas in the microbialites at the P-Tr boundary secctions around the Paleo-Tethys indicate that there was a long-distance dispersion of ostracods. However, the faunas maintained endemism at the specific level. Previous studies have regarded microbialites as whole units, and it is difficult to detect environmental changes within a microbialite interval based on paleoecological groups of (super) families. In this study, high-density sampling was applied to identify changes of abundance, diversity, and composition of assemblages of ostracods. The proportion of five dominant species at the section exhibited an evolutionary trend from the "Bairdia" group to the "Liuzhinia antalyaensis-Bairdiacypris ottomanensis" group. Furthermore, the evolution of the ostracod fauna was divided into six stages according to the changes of dominant species, which indicates that the microbialite environment was not entirely constant but fluctuated during the post-extinction interval. |
author2 |
China University of Geosciences Wuhan (CUG) Centre de Recherche en Paléontologie - Paris (CR2P) Muséum national d'Histoire naturelle (MNHN)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Wan, Junyu Yuan, Aihua Crasquin, S. Jiang, Haishui Yang, Hao Hu, Xia |
author_facet |
Wan, Junyu Yuan, Aihua Crasquin, S. Jiang, Haishui Yang, Hao Hu, Xia |
author_sort |
Wan, Junyu |
title |
High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China |
title_short |
High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China |
title_full |
High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China |
title_fullStr |
High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China |
title_full_unstemmed |
High-resolution variation of ostracod assemblages from microbialites near the Permian-Triassic boundary at Zuodeng, Guangxi, South China |
title_sort |
high-resolution variation of ostracod assemblages from microbialites near the permian-triassic boundary at zuodeng, guangxi, south china |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-03019848 https://hal.science/hal-03019848/document https://hal.science/hal-03019848/file/Wan%20et%20al.2019%2004%2016%20SC.pdf https://doi.org/10.1016/j.palaeo.2019.109349 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://hal.science/hal-03019848 Palaeogeography, Palaeoclimatology, Palaeoecology, 2019, 535, pp.109349. ⟨10.1016/j.palaeo.2019.109349⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2019.109349 hal-03019848 https://hal.science/hal-03019848 https://hal.science/hal-03019848/document https://hal.science/hal-03019848/file/Wan%20et%20al.2019%2004%2016%20SC.pdf doi:10.1016/j.palaeo.2019.109349 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.palaeo.2019.109349 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
535 |
container_start_page |
109349 |
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1810469780642070528 |