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学科主题: Oceanography
题名: Shells of Paphia undulata (Bivalvia) from the South China Sea as potential proxy archives of the East Asian summer monsoon: a sclerochronological calibration study
作者: Yan, LN ; Schone, B ; Li, SR ; Yan, Y
通讯作者: schoeneb@uni-mainz.de
关键词: Bivalve mollusk shell ; Sclerochronology ; Light-stable isotopes ; Environmental variables ; Shell growth rate ; Erratic monsoon event ; Terrestrial freshwater runoff
刊名: JOURNAL OF OCEANOGRAPHY
发表日期: 2014
卷: 70, 期:1, 页:35-44
收录类别: sci
部门归属: [Yan, Lina ; Schoene, Bernd R.] Johannes Gutenberg Univ Mainz, Dept Appl & Analyt Paleontol, Earth Sci Syst Res Ctr, Inst Geosci, D-55122 Mainz, Germany ; [Yan, Lina ; Li, Shengrong] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing, Peoples R China ; [Yan, Yan] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China
项目归属: 海洋地质
资助者: Earth System Science Research Center Geocycles, University of Mainz; Chinese Scholarship council
摘要: The climate of the South China Sea is dominated by the East Asian monsoon (EAM) system. Existing paleoclimate reconstructions offered an excellent insight into longer-term EAM variations. However, due to a lack of appropriate high-resolution paleoclimate data, relatively little is known about the frequency and strength of EAM extremes during the Holocene. To evaluate and establish a potential proxy archive for past variations of the EAM on shorter time-scales, we have carried out a calibration study on shells of the bivalve mollusk, Paphia undulata (Born 1778) from Daya Bay, China. This species has a short lifespan (3 years). Shells grow uninterruptedly between February/March and mid-November and are formed near oxygen isotopic (delta O-18) equilibrium with the ambient environment. Shell growth patterns, delta O-18(shell) and delta C-13(shell) values, can be used to estimate the relative amount of precipitation and terrestrial runoff. Therefore, shells of this species can provide reliable, sub-seasonally resolved data on past East Asian summer monsoon strengths. The feasibility of this method has been tested with two Holocene shells from sediment cores taken from the nearby Beibu Gulf. A rather peculiar finding is that shell growth of P. undulata seems to be largely uncoupled to measured local environmental variables. Growth rates are negatively correlated to seawater temperature and chlorophyll a levels and positively to salinity. It is hypothesized here that extraordinary fast shell growth in early spring (February/March; low temperature and primary productivity) are facilitated by preserved energy resources, ensuring that the bivalve quickly reaches the predation window and the required size for reproduction.
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WOS记录号: WOS:000330352300004
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10655
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Yan, LN; Schone, B; Li, SR; Yan, Y.Shells of Paphia undulata (Bivalvia) from the South China Sea as potential proxy archives of the East Asian summer monsoon: a sclerochronological calibration study,JOURNAL OF OCEANOGRAPHY,2014,70(1):35-44
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