Reliability of shell carbon isotope composition of different land snail species as a climate proxy: A case study in the monsoon region of China
Reliability of shell carbon isotope composition of different land snail species as a climate proxy: A case study in the monsoon region of China
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DOI：
10.1016/j.gca.2018.02.022
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发表时间：
2018-05
影响因子：
5
通讯作者：
R. Bao;Xuefen Sheng;H. Teng;J. Ji
中科院分区：
文献类型：
--
作者：
R. Bao;Xuefen Sheng;H. Teng;J. Ji
Carbon isotope compositions of land snail shells (δ13Cshell) are shown to be indicative of local climate conditions. However, it is largely unknown how the responses of δ13Cshellto climatic factors changes amongst different species. In this study, we collected 3 species of land snail shells across the East Asian monsoon region of China to explore the overall relationship between δ13Cshellas well as the response of individual species to the regional climate. Results show that, whereas all species collectively can provide a consensus relation between δ13Cshelland local climatic factors such as temperature and precipitation; the response of individual species to the fluctuations of these factors is not uniform. Specifically, while the southerly speciesBradybaena similarisexhibits robust δ13Cshell– mean precipitation correlation in both linearity and sensitivity, a common northerly species,Cathaica fasciola, only finds limited utility as a climate indicator, particularly for precipitation. Meanwhile, the south-central speciesAcusta ravidaappears to be able to faithfully record past climate conditions despite showing a wider distribution and a broader habitat. Such species-dependent nature in the relations between δ13Cshelland local climatic factors can be attributed to the effect of ingested carbonate and variations in eco-physiological factors of different species, and is expected to be widespread, suggesting the need to be taken into consideration for future studies.
