DOI: 10.1038/ngeo1649
论文题名: Two pulses of extinction during the Permian-Triassic crisis
作者: Song H. ; Wignall P.B. ; Tong J. ; Yin H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 1 起始页码: 52
结束页码: 56
语种: 英语
Scopus关键词: alga
; aquatic organism
; benthos
; ecosystem structure
; mass extinction
; Permian
; plankton
; Triassic
; Siberia
; algae
; Anthozoa
; Fusulinida
英文摘要: The Permian-Triassic mass extinction is the most severe biotic crisis identified in Earth history. Over 90% of marine species were eliminated, causing the destruction of the marine ecosystem structure. This biotic crisis is generally interpreted as a single extinction event around 252.3 million years ago, and has been variously attributed to the eruption of the Siberian Traps or possibly a bolide impact. Here we demonstrate that the marine extinction consisted of two pulses, separated by a 180,000-year recovery phase. We evaluated the range of 537 species representing 17 marine groups in seven Chinese sections from a 450,000-year interval spanning the Permian-Triassic boundary. The first stage of extinction occurred during the latest Permian, and was marked by the extinction of 57% of species, namely all plankton and some benthic groups, including algae, rugose corals, and fusulinids. The second phase occurred in the earliest Triassic, and resulted in the extinction of 71% of the remaining species. This second extinction phase fundamentally altered the marine ecosystem structure that had existed for the previous 200 million years. Because the two pulses showed different extinction selectivity, we conclude that they may have had different environmental causes. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106888
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China; School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom
Recommended Citation:
Song H.,Wignall P.B.,Tong J.,et al. Two pulses of extinction during the Permian-Triassic crisis[J]. Nature Geoscience,2013-01-01,6(1)