干旱区生态环境知识资源中心(Arid): Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China

Arid

DOI	10.1016/j.palaeo.2019.109236
	Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China
	Bao, Rui 1; Sheng, Xuefen 1; Lu, Huayu 2; Li, Chenglong 1; Luo, Ling 1; Shen, Hua 3; Wu, Min 3; Ji, Junfeng 1; Chen, Jun 1
通讯作者	Sheng, Xuefen
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2019
卷号	533
英文摘要	The stable oxygen and carbon isotope composition (delta O-18(shell) and delta C-13(shell)) of land snail shells preserved in Chinese eolian loess deposits have the potential to reconstruct past changes in the East Asian Summer Monsoon (EASM) since the late Oligocene. To assess the potential of delta O-18(shell) and delta C-13(shell) for the semi-quantitative reconstruction of past variations of the EASM, we studied modern snails and the corresponding vegetation composition of three distinct ecosystems (woodland, grassland and mountains), spanning a large rainfall gradient (1781403 mm) in the mid-latitude East Asian monsoon region. The results show that different snail species in the three ecosystems have significantly different values of delta O-18(shell) and delta C-13(shell). The snails in woodland from the eastern plain area have significantly lower delta O-18(shell) and delta C-13(shell) values than those of snails in grassland from the Chinese Loess Plateau, and the snails from the Qinba Mountains region have values intermediate between the two. Systematic variations of the delta C-13 of snail shells, body tissues and local plants are evident along the rainfall gradient, indicating that delta C-13(shell) is mainly influenced by the delta C-13 of ingested plants, which is controlled by the EASM. We confirm that delta C-13(shell) is a reliable precipitation proxy and we obtained a new empirical equation (delta C-13(shell) = -0.0030(+/- 0.0003) MAP - 8.80(+/- 0.32), r = -0.76, n = 74, p < 0.001) for the relationship between delta C-13(shell) and mean annual precipitation, which is based on the results of the present study, together with those of Bao et al. (2018). We infer that delta O-18(shell) is influenced by precipitation delta O-18, and that here is a significant relationship between d18Oshell and mean annual precipitation (delta O-18(shell) = -0.0028(+/- 0.0008) MAP - 1.32(+/- 0.58), r = -0.65, p < 0.05, n = 21), possibly because of the rainfall amount effect in the study region. In addition, temperature and evaporation associated with relative humidity play non-negligible roles in determining delta O-18(shell), and their effects should be considered before using the delta O-18 of fossil snail shells to reconstruct precipitation delta O-18 and/or rainfall amount.
英文关键词	Shell carbonate Rainfall amount East Asian summer monsoon Chinese Loess Plateau Environment variable Climate proxy
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000487174100010
WOS关键词	SOUTHERN GREAT-PLAINS ; NEGEV DESERT ; ARCHAEOLOGICAL SITE ; SHELL CARBONATE ; SAN-SALVADOR ; LOW-LATITUDE ; HOLOCENE ; RAINFALL ; MIDDLE ; DIET
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
EI主题词	2019-11-01
来源机构	南京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310688
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, Minist Educ, Key Lab Surficial Geochem, Nanjing 210023, Jiangsu, Peoples R China; 2.Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210023, Jiangsu, Peoples R China; 3.Nanjing Univ, Sch Life Sci, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Bao, Rui,Sheng, Xuefen,Lu, Huayu,et al. Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China[J]. 南京大学,2019,533.
APA	Bao, Rui.,Sheng, Xuefen.,Lu, Huayu.,Li, Chenglong.,Luo, Ling.,...&Chen, Jun.(2019).Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,533.
MLA	Bao, Rui,et al."Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 533(2019).