https://scholars.lib.ntu.edu.tw/handle/123456789/322626
標題: | Temporal variations of the trace fossil Zoophycos in a 425 ka long sediment record from the South China Sea: Implications for the ethology of the Zoophycos producer | 作者: | L{\\"o LUDVIG LOWEMARK |
關鍵字: | Ichnofossils; Lebensspuren; Quaternary; South China Sea; Zoophycos | 公開日期: | 2006 | 卷: | 143 | 期: | 1 | 起(迄)頁: | 105-114 | 來源出版物: | Geological Magazine | 摘要: | A 425 ka long record from piston core GIK17925-3 taken in the northeastern South China Sea was used to study the environmental conditions controlling the distribution of the Zoophycos trace fossil. The 12 m long core offers a unique opportunity to study the response of the Zoophycos-producing animal to environmental variations over four glacial-interglacial cycles. The trace fossils show a strong glacial to interglacial variation in their abundance with a special preference for intervals with low sedimentation rates. Additional X-ray radiograph studies of piston cores from the Southeast Asian Marginal Seas show that the trace fossil Zoophycos is widespread in slope and deep-marine sediments, with the highest abundances encountered in low sedimentation rate settings. The preference of the Zoophycos producer for low sedimentation rates in a setting with strong seasonal fluctuations in food supply due to the shift between winter and summer monsoons, is interpreted to be the result of a cache-model behaviour, where food is collected during rich times and squirrelled away for poor times. Core GIK17925-3 also offers an opportunity to assess the impact of Zoophycos bioturbation on various palaeoenvironmental proxies. In this core, more than 30 % of the measured data points were more or less strongly affected by Zoophycos bioturbation. Together with the widespread occurrence this percentage indicates that Zoophycos may pose a serious threat to palaeoclimatic reconstructions in cores from low to moderate sedimentation rate sites. © 2006 Cambridge University Press. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-33644927787&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/322626 |
DOI: | 10.1017/S0016756805001408 | SDG/關鍵字: | Biology; Food supply; Glacial geology; Pistons; Submarine geology; Ichnofossils; Lebensspuren; Quaternary; South China sea; Zoophycos; Sedimentation; Quaternary; temporal variation; trace fossil; Pacific Ocean; South China Sea; Animalia; Zoophycos |
顯示於: | 地質科學系 |
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