NIGPAS OpenIR
Sponge-dominated offshore benthic ecosystems across South China in the aftermath of the end-Ordovician mass extinction
Botting, Joseph P.1,2; Muir, Lucy A.2; Wang, Wenhui3; Qie, Wenkun (郄文昆)1; Tan, Jingqiang3; Zhang, Linna (张琳娜)4; Zhang, Yuandong (张元动)5
2018-09-01
Source PublicationGONDWANA RESEARCH
ISSN1342-937X
Volume61Pages:150-171
Abstract

Offshore benthic communities were sparse after the end-Ordovician mass extinction. The recent discovery of diverse, abundant sponges in south-eastern China (Anhui and Zhejiang provinces) that flourished during the Hirnantian (Late Ordovician) post-extinction interval raises questions over the extent and ecological significance of the sponge community at that time. This paper dramatically expands the scale of the Hirnantian sponge fauna within South China, with seven new occurrences across 2000 km. These occurrences cross the Ordovician-Silurian boundary interval in the marginal and submerged platform areas of the Yangtze Sea in Jiangsu, Hubei, Hunan, Chongqing and Sichuan provinces. In condensed sections (platform-margin facies), the occurrences are normally represented by extensive spiculite layers, but several sites yield entire, exceptionally preserved body fossils; at Ganggangshan (near Nanjing, Jiangsu Province), such preservation is abundant. The new occurrences are combined with palaeogeographic and tectonic reconstructions to produce a model for the distribution and preservation of the sponge fauna. We argue that the exceptional preservation was due largely to nepheloid layers that were generated during rapid post-glacial transgression that flooded the weathered land surface of the uplifted Cathaysia Block. Nepheloid-layer collapse led to rapid deposition of suspended sediment within the deeper parts of the intra-plate, restricted basin and on adjacent platform margins and slopes. The suspended sediment influx also introduced abundant nutrients to the water column, as indicated by a significant delta C-13 excursion during the sponge-bearing mudstone interval at Ganggangshan. The combined sponge assemblage was dominant over large areas of the Hirnantian offshore sea floor across South China. We predict that similar occurrences with exceptional preservation will also be found in other continental blocks: abundant articulated sponges may be encountered particularly in restricted basin successions containing rapidly deposited graptolitic mudstones near the Ordovician-Silurian boundary. (C) 2018 International Association for Gondwana Research. Published by Elsevier R.V. All rights reserved.

KeywordPorifera End-ordovician Mass Extinction Biodiversification Recovery Taphonomy Paleoecology
DOI10.1016/j.gr.2018.04.014
Language英语
WOS KeywordUpper Yangtze Region ; Silurian Transition ; Hexactinellid Sponge ; Iron Fertilization ; Global Correlation ; Biogenic Silica ; Sichuan Basin ; Prague Basin ; Black Shales ; Carbon
Funding ProjectNational Natural Science Foundation of China[41772001] ; National Natural Science Foundation of China[41402010] ; Thousand Youth Talents Plan of China ; Chinese Academy of Science (CAS) President's International Fellowship Initiative[2016VEB006] ; CAS[XDB10010100] ; Ministry of Science and Technology of the People's Republic of China[2017ZX05036-001-004]
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000454185100010
Funding OrganizationNational Natural Science Foundation of China ; Thousand Youth Talents Plan of China ; Chinese Academy of Science (CAS) President's International Fellowship Initiative ; CAS ; Ministry of Science and Technology of the People's Republic of China
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/16154
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorWang, Wenhui
Affiliation1.Nanjing Inst Geol & Palaeontol, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
2.Amgueddfa Cymru Natl Museum Wales, Dept Nat Sci, Cathays Pk, Cardiff CF10 3LP, S Glam, Wales
3.Cent S Univ, Sch Geosci & Infophys, Key Lab Metallogen Predict Nonferrous Met & Geol, Minist Educ, Changsha 410083, Hunan, Peoples R China
4.Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
5.Nanjing Inst Geol & Palaeontol, CAS Key Lab Econ Stratig & Palaeogeog, 39 East Beijing Road, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Botting, Joseph P.,Muir, Lucy A.,Wang, Wenhui,et al. Sponge-dominated offshore benthic ecosystems across South China in the aftermath of the end-Ordovician mass extinction[J]. GONDWANA RESEARCH,2018,61:150-171.
APA Botting, Joseph P..,Muir, Lucy A..,Wang, Wenhui.,Qie, Wenkun .,Tan, Jingqiang.,...&Zhang, Yuandong .(2018).Sponge-dominated offshore benthic ecosystems across South China in the aftermath of the end-Ordovician mass extinction.GONDWANA RESEARCH,61,150-171.
MLA Botting, Joseph P.,et al."Sponge-dominated offshore benthic ecosystems across South China in the aftermath of the end-Ordovician mass extinction".GONDWANA RESEARCH 61(2018):150-171.
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