globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.10.008
论文题名:
Late Ordovician brachiopod distribution and ecospace partitioning in the Tvären crater system, Sweden
作者: Frisk Å.M.; Harper D.A.T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 369
起始页码: 114
结束页码: 124
语种: 英语
英文关键词: Brachiopods ; Ecospace ; Guilds ; Impact crater ; Ordovician ; Tvären
英文摘要: Patterns of distribution and ecospace utilization of Late Ordovician brachiopods in a recently formed, contemporary meteorite crater are described and analyzed. Rhynchonelliformean brachiopod communities, dominated by a wide range of orthides and strophomenides, colonized the newly formed crater. At the crater rim communities were established early on, although the crater depression was not inhabited until deposition of the upper third of the remaining crater fill. The crater formed a protected but restricted microenvironment where sediments four times the thickness of the nearby basinal succession accumulated. Within this narrow space environments varied from shallow-water to deeper-waters, about 200. m in depth, and from well oxygenated to hypoxic. Such varied environments generated a rough ecological landscape, facilitating niche partitioning across a relatively small geographic area. Analysis of the guild structure of the fauna permits explanation of a local biodiversity hotspot in otherwise low-diversity strata elsewhere in the Scandinavian region. The Tvären impact event had an important palaeobiologic effect upon the fossil record as it served as a local pump and reservoir for biodiversity. Moreover the development of new community types and narrowly-defined niches helped further drive both α and β biodiversity during a critical phase of the Great Ordovician Biodiversification Event. © 2012 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69880
Appears in Collections:过去全球变化的重建

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作者单位: Department of Earth Sciences, Palaeobiology, Uppsala University, Villavägen 16, SE-752 36 Uppsala, Sweden; Paläontologisches Institut und Museum, University of Zurich, Karl-Schmid-Strasse 4, CH-8006 Zürich, Switzerland; Geological Museum, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen K, Denmark; Department of Earth Sciences, Durham University, Durham DH1 3LE, United Kingdom; Department of Earth Sciences, Durham University, Durham DH1 3LE, United Kingdom

Recommended Citation:
Frisk Å.M.,Harper D.A.T.. Late Ordovician brachiopod distribution and ecospace partitioning in the Tvären crater system, Sweden[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,369
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