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Implications of the apparent C-14 age of cultured Achatina fulica and the spatial features of C-14 ages among modern land snail shells in China

文献类型：期刊论文

作者Dong, Jibao2,3; Cheng, Peng2,3,4,5,6; Eiler, John1
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2020-05-01
卷号545页码:8
ISSN号0031-0182
DOI10.1016/j.palaeo.2020.109654
通讯作者Cheng, Peng(chp@ieecas.cn)
英文摘要It has long been known that many terrestrial snail shells are subject to the so-called "limestone effect". However, the magnitude and impact of this effect on the delta C-13 values of snail shells and soft body tissue (delta C-13(shell) and delta C-13(body)) are still unknown. In this study, Achatina fulica snails were hatched and cultured under controlled conditions and supplied with C-14-free calcium carbonate and lettuce (a C-3 plant) as a calcium source and food supply, respectively. The snail shells and soft body tissues were sampled monthly for 5 months, and delta C-13 and radiocarbon dating analyses were conducted to trace carbon source variations at different growth stages. Our results show that the apparent C-14 age of the shells and the corresponding delta C-13(shell) values increased progressively from the 1st to 3rd months and subsequently decreased during the 4th and 5th months. The results demonstrate for the first time that carbonate ingestion has a straightforward influence on the C-14 ages and delta C-13 values of shells and that the "limestone effect" changes over the lifetime of snails. Moreover, the apparent C-14 ages of snails sampled in the field are older than modern ages when taken from the northern carbonate region and relatively young or the same as modern ages when collected from ferralic soils. This further supports our findings from cultured snails and suggests that snail shells are good archives for radiocarbon dating purposes in southern China. Although the delta C-13 values of the soft body tissues of cultured snails vary synchronously with those of the shell, this seemingly common phenomenon cannot be easily explained by carbonate ingestion, as the snail bodies are of more recent origin than the shells. Atmospheric CO2 may be another candidate explaining the synchronicity between delta C-13(shell) and delta C-13(body), as well as the F C-14 variations of snail bodies. However, it is still unclear how snails differentially incorporate carbon from different sources (e.g., carbonate and atmospheric CO2) at different growth stages, since carbon from different sources is combined in the bicarbonate pool in the hemolymph before being used by snails.
WOS关键词STABLE-ISOTOPE COMPOSITION ; TERRESTRIAL GASTROPOD SHELLS ; SOUTHERN GREAT-PLAINS ; ARCHAEOLOGICAL SITE ; RADIOCARBON DATES ; LOESS DEPOSITS ; LOW-LATITUDE ; CARBON ; OXYGEN ; RECORD
资助项目National Natural Science Foundation of China[41302152] ; Chinese Academy of Sciences[SKLLQGPY1703] ; Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; Chinese Academy of Sciences[ZDBS-SSW-DQC001] ; Minister of Science and Technology of China[2016YFE0109500] ; National Research Program for Key Issues in Air Pollution Control[DQGG0105-02]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
出版者ELSEVIER
WOS记录号WOS:000526825900013
资助机构National Natural Science Foundation of China ; Chinese Academy of Sciences ; Minister of Science and Technology of China ; National Research Program for Key Issues in Air Pollution Control
源URL[http://ir.ieecas.cn/handle/361006/12557]  
专题地球环境研究所_加速器质谱中心
第四纪科学与全球变化卓越创新中心
通讯作者Cheng, Peng
作者单位1.CALTECH, Pasadena, CA 91125 USA
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
3.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
4.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
5.Xian AMS Ctr IEECAS, Xian 710061, Peoples R China
6.Shaanxi Prov Key Lab Accelerator Mass Spectrometr, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Jibao,Cheng, Peng,Eiler, John. Implications of the apparent C-14 age of cultured Achatina fulica and the spatial features of C-14 ages among modern land snail shells in China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,545:8.
APA Dong, Jibao,Cheng, Peng,&Eiler, John.(2020).Implications of the apparent C-14 age of cultured Achatina fulica and the spatial features of C-14 ages among modern land snail shells in China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,545,8.
MLA Dong, Jibao,et al."Implications of the apparent C-14 age of cultured Achatina fulica and the spatial features of C-14 ages among modern land snail shells in China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 545(2020):8.

入库方式： OAI收割

来源：地球环境研究所

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