Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China
Stable carbon and oxygen isotopic composition of modern land snails along a precipitation gradient in the mid-latitude East Asian monsoon region of China
复制标题
中国中纬度东亚季风区现代陆地蜗牛沿降水梯度的稳定碳氧同位素组成
DOI:
10.1016/j.palaeo.2019.109236
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发表时间:
2019-11
期刊:
影响因子:
--
通讯作者:
Jun Chen
中科院分区:
文献类型:
--
作者:
Rui Bao;Xuefen Sheng;Huayu Lu;Chenglong Li;Ling Luo;Hua Shen;Min Wu;Junfeng ji;Jun Chen
The stable oxygen and carbon isotope composition (δ18Oshelland δ13Cshell) of land snail shells preserved inChineseeolianloessdepositshavethepotentialtoreconstructpastchangesintheEastAsianSummerMonsoon(EASM) since the late Oligocene. To assess the potential of δ18Oshelland δ13Cshellfor the semi-quantitative re-constructionofpastvariationsoftheEASM,westudiedmodernsnailsandthecorrespondingvegetationcom-position of three distinct ecosystems (woodland, grassland and mountains), spanning a large rainfall gradient(178–1403mm)inthemid-latitudeEastAsianmonsoonregion.Theresultsshowthatdifferentsnailspeciesinthethreeecosystemshavesignificantlydifferentvaluesofδ18Oshellandδ13Cshell.Thesnailsinwoodlandfromtheeasternplainareahavesignificantlylowerδ18Oshellandδ13CshellvaluesthanthoseofsnailsingrasslandfromtheChinese LoessPlateau, andthe snailsfrom theQinba Mountainsregion have valuesintermediate between thetwo.Systematicvariationsoftheδ13Cofsnailshells,bodytissuesandlocalplantsareevidentalongtherainfallgradient,indicatingthatδ13Cshellismainlyinfluencedbytheδ13Cofingestedplants,whichiscontrolledbytheEASM. We confirm that δ13Cshellis a reliable precipitation proxy and we obtained a new empirical equation(δ13Cshell=−0.0030(±0.0003) MAP−8.80(±0.32),r=−0.76,n=74,p< 0.001) for the relationshipbetween δ13Cshelland mean annual precipitation, which is based on the results of the present study, togetherwith those of Bao et al. (2018). We infer that δ18Oshellis influenced by precipitation δ18O, and that here is asignificant relationship between δ18Oshelland mean annual precipitation (δ18Oshell=−0.0028(±0.0008)MAP−1.32(±0.58),r=−0.65,p< 0.05,n=21),possiblybecauseoftherainfallamounteffectinthestudyregion.Inaddition,temperatureandevaporationassociatedwithrelativehumidityplaynon-negligiblerolesindetermining δ18Oshell, and their effects should be considered before using the δ18O of fossil snail shells to re-construct precipitation δ18O and/or rainfall amount.
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影响因子:
5.3
作者:
L. Stott
通讯作者:
L. Stott
DOI:
10.1016/s0921-8181(00)00042-4
发表时间:
2000-11
期刊:
--
影响因子:
--
作者:
P. Abell;I. Plug
通讯作者:
P. Abell;I. Plug
影响因子:
5.3
作者:
GOODFRIEND, GA;MAGARITZ, M
通讯作者:
MAGARITZ, M
影响因子:
2.2
作者:
G. Goodfriend;G. Ellis
通讯作者:
G. Goodfriend;G. Ellis
DOI:
--
发表时间:
2010
期刊:
Transactions of Atmospheric Sciences
影响因子:
--
作者:
Z. Fuying
通讯作者:
Z. Fuying