DOI: 10.1016/j.palaeo.2015.09.029
论文题名: Effects of organic solvents on stable isotopic composition of otolith and abiogenic aragonite
作者: Gao Y. ; Crowley S. ; Conrad R. ; Dettman D.L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 440 起始页码: 487
结束页码: 495
语种: 英语
英文关键词: Fluid-preserved specimens
; Isotopic effects
; Otoliths
; Pacific halibut
; δ13C and δ18O
英文摘要: Otoliths are important proxies for climate change and ecological studies and are typically stored in glycerin or ethanol for preservation. This study is the first attempt to assess the isotopic effects of these preservatives on carbon and oxygen isotope ratios of otolith aragonite. Experimental tests from the 4th annulus of dried Pacific halibut otoliths were compared to samples from the same otoliths collected after 30day storage in either glycerin or ethanol. In addition, isotopic measurements of abiogenic pure aragonite samples soaked in glycerin, ethanol, acetone, dichlorom (DCM), and methanol were compared to the initial values following the same protocol. No δ18O effect was observed for otoliths stored in glycerin or ethanol; and no isotopic effects (both δ18O and δ13C) were observed for abiogenic pure aragonite stored in the five organic solvents commonly used in geochemical laboratories. Although there was a significant but very small difference in carbon isotope ratios of halibut otoliths, the shift was of a barely measureable magnitude and the statistically significant difference only in δ13C values may result from the inhomogeneous composition and structure of otoliths. Thus we concluded that there was no isotopic exchange during organic solvent storage or preservative interference in the isotope ratio measurements. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68751
Appears in Collections: 过去全球变化的重建
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作者单位: Makah Fisheries Management, P.O. Box 115, Neah Bay, WA, United States; Department of Earth and Ocean Sciences, University of Liverpool, Liverpool, United Kingdom; Northwest Indian Fisheries Commission, 6730 Martin Way East, Olympia, WA, United States; Department of Geosciences, University of Arizona, Tucson, AZ, United States
Recommended Citation:
Gao Y.,Crowley S.,Conrad R.,et al. Effects of organic solvents on stable isotopic composition of otolith and abiogenic aragonite[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,440