DOI: 10.1016/j.earscirev.2020.103280
论文题名: The latest Ordovician Hirnantian brachiopod faunas: New global insights
作者: Rong J. ; Harper D.A.T. ; Huang B. ; Li R. ; Zhang X. ; Chen D.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 208 语种: 英语
中文关键词: Brachiopod evolution
; Edgewood-Cathay Fauna
; Environmental complexity and perturbations
; Gondwanan glaciation
; Hirnantia Fauna
; Hirnantian crisis
英文关键词: biostratigraphy
; brachiopod
; carbonate rock
; depositional environment
; Hirnantian
; new taxon
; Ordovician
; spatiotemporal analysis
; Animalia
; Metazoa
英文摘要: The temporal and spatial distribution of Hirnantian brachiopod faunas are reviewed based on a new, comprehensive dataset from over 20 palaeoplates and terranes, a revised correlation scheme for Hirnantian strata and numerical methods including network analysis. There were two successive evolutionary faunas: 1. widespread and diachronous Hirnantia Fauna related to the glacial acme in the early−mid Hirnantian, including shallow, deeper and deep-water communities that diversified in much more complicated environmental conditions than hitherto envisaged; and 2. Edgewood-Cathay Fauna (new term) thrived during post-glacial, warmer, shallow-water regimes with both carbonate and siliciclastic facies from low latitudes in the late Hirnantian−early Rhuddanian. The two survival faunas occur in the same order in different regions, immediately following the first and second phases of the Hirnantian crisis, respectively. This faunal succession records two climatic perturbations, one with a glaciation, associated with climatic cooling and a global low-stand, during which the Hirnantia Fauna flourished, and a second characterized by melting ice, global warming, and sea-level rise (with global anoxia), aligned to the development of the Edgewood-Cathay Fauna and the repopulation of the seas by many animals adapted to warmer water, e.g., those in metazoan reefs, massive tabulates, and sponges. Changes in many properties of the Hirnantia Fauna may have resulted from the heterogeneity of global climate change in time and space; contrasts in the Edgewood-Cathay faunas record differences between carbonate and siliciclastic deposition, respectively, at low latitudes. Intense climate changes, sea-level fluctuations, and oceanographic ventilation and anoxia, had important roles in brachiopod evolution through the Hirnantian extinctions as first taxa confined to warm-water and then cool-water conditions were the main victims. During the Hirnantian, higher originations of new taxa may have been a response to crises, which increased the rate of phyletic evolution due to extreme climatic conditions. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166235
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Center for Excellence in Life and Palaeoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China; Palaeoecosystems Group, Department of Earth Sciences, Durham University, Durham, DH1 3LE, United Kingdom; Department of Geology, Brandon UniversityMB R7A 6A9, Canada
Recommended Citation:
Rong J.,Harper D.A.T.,Huang B.,et al. The latest Ordovician Hirnantian brachiopod faunas: New global insights[J]. Earth Science Reviews,2020-01-01,208