Vegetation changeover across the Permian–Triassic Boundary in Southwest China

Yu, Jianxin; Broutin, Jean; Chen, Zhong‐Qiang; Shi, Xiaobin; Li, Hui; Chu, Daoliang; Huang, Qisheng

doi:10.1016/j.earscirev.2015.04.005

Cited by 100 publications

(51 citation statements)

References 43 publications

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“…Initially by paleobotanists at the Nanjing Institute of Geology and Paleontology (Ouyang and Li, 1980;Ouyang, 1982Ouyang, , 1986. Regained interest for these sections led to numerous stratigraphical and paleontological studies led by the group of the China University of Geosciences Wuhan (Wang and Yin, 2001;Zhao, 2003;Zhang et al, 2006;Yin et al, 2007;Yu et al, 2007Yu et al, , 2008Yu et al, , 2010Yu et al, , 2015Peng and Shi, 2009 and references therein), and again by the researchers of the Nanjing Institute of Geology and Palaeontology (Fang, 2004;Shen et al, 2011;Zhang et al, 2015).…”

Section: Geologic Settingmentioning

confidence: 99%

“…As the placement of the PTB at the Meishan GSSP is defined based on First Appearance Datum (FAD) of the conodont Hindeodus parvus, a strictly marine fossil, it is not possible to directly define the PTB on land until a detailed correlation has been performed. Currently, there are two opposed opinions, the view of researchers at the China University of Geosciences Wuhan (Wang and Yin, 2001;Zhao, 2003;Zhang et al, 2006;Yin et al, 2007;Yu et al, 2007Yu et al, , 2008Yu et al, , 2010Yu et al, , 2015Peng and Shi, 2009 and references therein), who estimated the PTB within the upper part of the Xuanwei Formation, and that of researchers at the Nanjing Institute of Geology and Paleontology (Shen et al, 2011;Zhang et al, 2015), who estimated the PTB much higher, within the lower part of the Dongchuan Formation. No clear criteria exist for the definition of the PTB in the terrestrial realm, and correlations have been based on different criteria by different groups of researchers.…”

Section: Placement Of the Ptbmentioning

confidence: 99%

“…5). In the terrestrial sections, numerous plant fossils (Wang and Yin, 2001;Zhao, 2003;Zhang et al, 2006;Yin et al, 2007;Yu et al, 2007Yu et al, , 2008Yu et al, , 2010Yu et al, , 2015Peng and Shi, 2009;Bercovici et al, 2015) (Yu et al, 2010;Bercovici et al, 2015). The Gigantopteris flora (Gigantonoclea guizhouensis -Annularia pingloensis assemblage), which include wetland cordaitales, sphenopsids and pteridosperms, suggesting a warm and humid climate, has previously been attributed to the Late Permian (Changhsingian) whilst the Annalepis -Peltaspermum assemblage has been attributed to the Early Triassic (Induan; Yu et al, 2010).…”

Section: Biostratigraphymentioning

confidence: 99%

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Carbon cycle perturbation expressed in terrestrial Permian–Triassic boundary sections in South China

Cui

Bercovici

et al. 2017

Global and Planetary Change

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Stable isotopes of inorganic and organic carbon are commonly used in chemostratigraphy to correlate marine and terrestrial sedimentary sequences based on the assumption that the carbon isotopic signature of the exogenic carbon pool dominates other sources of variability. Here, sediment samples from four Permian-Triassic boundary (PTB) sections of western Guizhou and eastern Yunnan provinces in South China, representing a terrestrial to marine transitional setting, were analyzed for δ 13 C of organic matter (δ 13 C org). These values were subsequently compared to published δ 13 C values of carbonates (δ 13 C carb) from the Global Stratotype Section and Point at Meishan and many other marine and terrestrial sections. A similar isotopic trend evident through all four sections is characterized by a negative shift of 2-3 ‰ at the top of the Xuanwei Formation, where we tentatively place the PTB. This negative shift also corresponds to a turnover in the vegetation and the occurrence of fungal spores, which is generally interpreted as a proliferation of decomposers and collapse of complex ecosystems during the end-Permian mass extinction event. Moreover, the absolute values of δ 13 C org are more extreme in the more distal (marine) deposits. The δ 13 C org values for the studied sediments are more variable compared to coeval δ 13 C carb records from marine records especially in the interval below the extinction horizon. We contend that the depositional environment influenced the δ 13 C org values, but that the persisting geographic δ 13 C org pattern through the extinction event across the four independent sections is an indication that the atmospheric δ 13 C signal left an indelible imprint on the geologic record related to the profound ecosystem change during the end-Permian extinction event.

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Section: Geologic Settingmentioning

confidence: 99%

Section: Placement Of the Ptbmentioning

confidence: 99%

Section: Biostratigraphymentioning

confidence: 99%

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Carbon cycle perturbation expressed in terrestrial Permian–Triassic boundary sections in South China

Cui

Bercovici

et al. 2017

Global and Planetary Change

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“…3C). The proposed Permian to Early Triassic land-to-sea paleoenvironmental reconstruction (Peng et al 2005;Yu et al, 2015;Bercovici et al, 2015) must be reconsidered based on regional tectonic and stratigraphic analyses. The inferred contemporaneity between the marine and terrestrial extinction events, recently questioned in the South African Karoo Basin (Gastaldo et al, 2015(Gastaldo et al, , 2017, must therefore be also re-evaluated in southern China.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Terrestrial Permian–Triassic boundary in southern China: New stratigraphic, structural and palaeoenvironment considerations

Bourquin

Rossignol

Jolivet

et al. 2018

Palaeogeography, Palaeoclimatology, Palaeoecology

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International audienceThe Permian–Triassic boundary is located above the main Phanerozoic terrestrial and marine biotic crisis. Southwest China (eastern Yunnan and western Guizhou) is considered as an ideal place in Asia to study the terrestrial Permian–Triassic boundary, its correlation with the stratigraphically equivalent marine deposits, and to discuss the contemporaneity between the marine and terrestrial extinctions. The Chahe and Zhejue sections, which have already been studied in detail, especially using δ13C isotopic analyses for both sections and geochronology for the Chahe section, are considered to be the reference terrestrial sections to discuss changes (both through time and space) in macroflora, pollen diversity and paleoenvironment. Based on new structural analyses of these sections, we demonstrate that they have been strongly affected by polyphase deformations and are, therefore, not suitable to discuss the vertical and/or lateral evolutions of the depositional environments within the Permian–Triassic succession. The use of the Chahe and Zhejue sections to study the contemporaneity between marine and terrestrial extinction events at the end of the Permian in southern China, as well as the stratigraphic correlations and the palaeoenvironment reconstitution of western Guizhou and eastern Yunnan, therefore, must be reconsidered

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“…In fact, abnormal climatic conditions observed from marine records, such as global warming, wildfire, and enhanced weathering, would have had a severe impact on the terrestrial ecosystem and synchronously caused great losses of vertebrates and plants (Benton, 1985;Retallack et al, 1996Retallack et al, , 2011Retallack et al, 2003;Benton et al, 2004;Retallack, 2013;Benton and Newell, 2014;Yu et al, 2015). Widespread braided river systems are believed to have resulted from the combination of the decreased vegetation coverage and enhanced terrestrial weathering (Newell et al, 1999;Ward et al, 2000).…”

Section: Introductionmentioning

confidence: 97%