globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0134279
论文题名:
Bioerosion of Inorganic Hard Substrates in the Ordovician of Estonia (Baltica)
作者: Olev Vinn; Mark A. Wilson; Ursula Toom
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2015
发表日期: 2015-7-28
卷: 10, 期:7
语种: 英语
英文关键词: Ordovician period ; Estonia ; Limestone ; Paleoclimatology ; Carbonates ; Calcite ; Sedimentation ; Stratigraphy
英文摘要: The earliest bioeroded inorganic hard substrates in the Ordovician of Estonia appear in the Dapingian. Hardgrounds are also known from the Sandbian and Katian. Most of the bioerosion of inorganic hard substrates occurs as the boring Trypanites Mägdefrau, 1932 along with some possible Gastrochaenolites borings. North American hardground borings are more diverse than those in Baltica. In contrast to a worldwide trend of increasing boring intensity, the Estonian record seems to show no increase in boring intensities during the Middle and Late Ordovician. Hardgrounds seem to be more common during the temperate climate interval of the Ordovician calcite sea in Estonia (seven hardgrounds during 15 my) than in the part with a tropical climate (four hardgrounds during 12 my). Bioerosion is mostly associated with carbonate hardgrounds, but cobbles and pebbles broken from the hardgrounds are also often penetrated by Trypanites borings. The general diversity of boring ichnotaxa in Baltica increased from one ichnospecies in the Cambrian to seven by the end of Ordovician, showing the effect of the GOBE on bioeroding ichnotaxa. The diversity of inorganic hard substrate borers increased by only two times. This difference can be explained by the wider environmental distribution of organic as compared to inorganic substrates in the Ordovician seas of Baltica, and their more continuous temporal availability, which may have caused increased specialization of several borers. The inorganic substrates may have been bioreroded only by the generalists among boring organisms.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0134279&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/20280
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: University of Tartu, Department of Geology, Tartu, Estonia;The College of Wooster, Department of Geology, Wooster, United States of America;Tallinn University of Technology, Institute of Geology, Tallinn, Estonia

Recommended Citation:
Olev Vinn,Mark A. Wilson,Ursula Toom. Bioerosion of Inorganic Hard Substrates in the Ordovician of Estonia (Baltica)[J]. PLOS ONE,2015-01-01,10(7)
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