DOI: 10.1016/j.palaeo.2014.06.011
论文题名: Revising and refining the bryozoan zs-MART seasonality proxy
作者: McClelland H.L.O. ; Taylor P.D. ; O'Dea A. ; Okamura B.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 410 起始页码: 412
结束页码: 420
语种: 英语
英文关键词: Acanthodesia
; Mean annual range of temperature (MART)
; Palaeoseasonality
; Temperature size rule
; Zooid variability
英文摘要: The zs-MART (zooid-size derived mean annual range of temperature) seasonality proxy is based on temperature-related variation in the sizes of zooids found in colonies of cheilostome bryozoans. It has been used in a number of studies for inferring palaeoseasonality. Here we present a revised version of the equation for the zs-MART proxy based on an appropriate regression analysis and an estimate of the error associated with predicted values. We use this improved version to recalculate data used in studies that have employed the zs-MART proxy and evaluate their conclusions in light of the revised estimates for seasonal regimes. In order to investigate trans-colony zooid-size profiles in zooid size, length and width, 1195 zooids from 40 transects through 19 fossil and Recent specimens of the malacostegine cheilostome bryozoan Acanthodesia were measured using a stereomicroscope with eyepiece graticule. The position of zooids within bifurcating rows of Acanthodesia colonies is found to influence zooid size, and this exemplifies potential problems for studies based on zooid-size transects and random sampling of zooids. Our demonstration that oscillatory signals in zooid size, possibly attributable to seasonal temperature regimes, can be detected whilst accounting for other sources of variation confirms that a more sophisticated zs-MART proxy may prove useful for constraining parameters in ocean models addressing questions about past climate. However, such a proxy will require more parameters than originally described along with larger raw datasets. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69260
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Life Sciences, Natural History Museum, London, United Kingdom; Department of Earth Sciences, Natural History Museum, London, United Kingdom; Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Panama; Department of Earth Sciences, University of Oxford, South Parks Rd., Oxford, United Kingdom
Recommended Citation:
McClelland H.L.O.,Taylor P.D.,O'Dea A.,et al. Revising and refining the bryozoan zs-MART seasonality proxy[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,410