globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2014.04.004
Scopus记录号: 2-s2.0-84899691727
论文题名:
An expanded ostracod-based conductivity transfer function for climate reconstruction in the Levant
作者: Mischke S.; Almogi-Labin A.; Al-Saqarat B.; Rosenfeld A.; Elyashiv H.; Boomer I.; Stein M.; Lev L.; Ito E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 93
起始页码: 91
结束页码: 105
语种: 英语
英文关键词: Conductivity ; Near East ; Ohalo Site ; Ostracoda ; Salinity ; Sea of Galilee ; Transfer function
Scopus关键词: Climate change ; Electric conductivity ; Least squares approximations ; Transfer functions ; Water ; Water conservation ; Animals ; Climate change ; Electric conductivity ; Glacial geology ; Hydrochemistry ; Least squares approximations ; Mean square error ; Water ; Water conservation ; Near East ; Ohalo Site ; Ostracoda ; Salinity ; Sea of Galilee ; Near east ; Ohalo site ; Sea of galilee ; Animals ; Transfer functions ; climate variation ; conductivity ; data set ; fossil assemblage ; freshwater ecosystem ; least squares method ; ostracod ; paleoenvironment ; water chemistry ; Israel ; Jordan ; Levant ; Mediterranean Region ; Northern District ; Sea of Galilee ; Cyprideis torosa ; Cypridopsis ; Cypridopsis vidua ; Gomphocythere ; Heterocypris salina ; Ilyocypris ; Ostracoda ; Prionocypris ; Prionocypris zenkeri
英文摘要: We present the first modern calibration dataset linking ostracod assemblage composition to water chemistry, and other site-specific variables, in the hydrologically and geopolitically sensitive southern Levant region. A total of 42 ostracod taxa were recorded from the 178 sampled sites in Israel and Jordan. Ilyocypris spp., Heterocypris salina and Cypridopsis vidua are the most abundant taxa. Species strictly confined to freshwater conditions are Prionocypris zenkeri, Gomphocythere ortali and Prionocypris olivaceus. In contrast, H.salina, Bradleytriebella lineata and Cyprideis torosa show high frequencies in brackish waters (waters with higher conductivity). Humphcypris subterranea, G.ortali, P. olivaceus and Cypridopsis elongata apparently prefer flowing waters. Specific conductivity optima and tolerance ranges were calculated for the recorded ostracod species and may be used for the palaeoenvironmental assessment of fossil ostracod assemblages. In addition, a transfer-function for quantitative specific conductivity estimation based on 141 samples was established with weighted averaging partial least squares regression (WA-PLS). The resulting coefficient of determination r2 between observed and predicted conductivity values (0.72) and the root-mean-square error of prediction (RMSEP) in % gradient length (13.1) indicate that conductivity may be reliably estimated from ostracod assemblage data. The transfer function was first applied to last glacial ostracod assemblage data from an archaeological trench in the Sea of Galilee (northern Israel). Relatively large conductivity fluctuations between ca1 and 7mScm-1 were inferred for the period 24-20cal ka BP. In addition, four episodes of freshwater influx near the site of the trench were identified from the presence of shells of freshwater and stream-dwelling species intermingled with very abundant shells of Cyprideis torosa. The results of our study allow a better use of Quaternary ostracods from the Levant as palaeoenvironmental indicators of water-body types and past conductivity levels and will contribute to a better understanding of Quaternary environmental and climate change in the Levant. © 2014 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60269
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作者单位: Institute of Earth and Environmental Science, University of Potsdam, Germany; Institute of Geological Sciences, Freie Universität Berlin, Germany; Geological Survey of Israel, Jerusalem 9550161, Israel; The Al al-Bayt University, PO Box 130040, Mafraq 25113, Jordan; Ecolo-GIS, PO Box 133, Berotaim 4285000, Israel; Stable Isotope and Luminescence Laboratory, University of Birmingham, United Kingdom; Limnological Research Center, University of Minnesota, 310 Pillsbury Dr. SE, Minneapolis, MN 55455, United States

Recommended Citation:
Mischke S.,Almogi-Labin A.,Al-Saqarat B.,et al. An expanded ostracod-based conductivity transfer function for climate reconstruction in the Levant[J]. Quaternary Science Reviews,2014-01-01,93
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