DOI: 10.1016/j.palaeo.2015.10.010
论文题名: Environmental and diagenetic records from trace elements in the Mediterranean coral Cladocora caespitosa
作者: Royle S.H. ; Andrews J.E. ; Turner J. ; Kružić P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 440 起始页码: 734
结束页码: 749
语种: 英语
英文关键词: Corals
; LA-ICP-MS
; Mediterranean
; Palaeoclimate
; Pleistocene
; Trace elements
英文摘要: Trace element contents in coralline aragonite have long been used as proxies to record environmental growth conditions such as sea surface temperature (SST). In this study we explored whether trace element contents in modern and fossil corals (Cladocora caespitosa) from the Mediterranean could help constrain SST temperature and seasonality of climate in late Pleistocene interglacials. In modern Adriatic C. caespitosa, the individual corallite Sr/Ca signal captures seasonal variation with up to 68% of the variance related to SST. A similar but weaker relationship is shown by Mg/Ca. However, published equations to quantify absolute water temperature from Sr and Mg contents in modern C. caespitosa did not yield consistent or credible results, because each corallite exerts a strong, non-predictable 'vital effect'. With no constant species-specific offset from equilibrium, temperature-trace element relationships become, at best, colony specific and unsuitable for absolute palaeotemperature reconstruction. Despite this, temperature-related cyclicity in Sr and Mg is preserved in corallites up to at least MIS 7 age, allowing identification of seasonality in SST. In addition, unusual trace element anomalies in modern C. caespitosa can inform on events such as sediment discharge into the coastal zone. Partial diagenetic alteration of fossil C. caespitosa skeletons from aragonite to calcite destroys original SST driven cyclic trace element signals and is an effective indicator of corallite preservation quality. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68740
Appears in Collections: 过去全球变化的重建
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作者单位: School of Environmental Sciences, University of East Anglia, Norwich, England, United Kingdom; Laboratory for Marine Biology, Department of Zoology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, Zagreb, Croatia
Recommended Citation:
Royle S.H.,Andrews J.E.,Turner J.,et al. Environmental and diagenetic records from trace elements in the Mediterranean coral Cladocora caespitosa[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,440