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Plant cuticle as a possible palaeo-Hg proxy: Implications from Hg concentration data of extant Ginkgo L. and extinct ginkgoaleans

文献类型：期刊论文

作者Zhang, Li6,7,8; Wang, Yongdong2,5,8; Ruhl, Micha1; Kovacs, Emma Blanka; Xu, Yuanyuan4,8; Zhu, Yanbin4,8; Lu, Ning3; Chen, Hongyu4,8
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2024-08-01
卷号647页码:14
关键词Gaseous mercury concentration Foliar/cuticular Hg concentration Ginkgoaleans Fossil cuticles Early Jurassic Karoo-Ferrar Large Igneous Province
ISSN号0031-0182
DOI10.1016/j.palaeo.2024.112214
通讯作者Wang, Yongdong(ydwang@nigpas.ac.cn) ; Ruhl, Micha(ruhlm@tcd.ie)
英文摘要Vegetative leaves have long been considered a significant receiver of gaseous Hg in the atmosphere, offering the potential to passively monitor palaeo-atmospheric Hg concentrations; however, few constraints on this exist. In this study, we conduct Hg measurements on three Ginkgo leaf collections: i) modern leaves from ten sampling sites across China, ii) modern leaves collected monthly across one growing season in Nanjing (China), iii) fossil ginkgoaleans leaves from the Middle Jurassic (China). The results from this study reveal that the foliar Hg concentrations (with an average concentration of 61 ng.g(-1), N = 272) were higher than those observed in Ginkgo leaf samples previously studied from Ireland and the USA. Additionally, the leaf age and atmospheric Hg concentrations represent two primary factors impacting foliar Hg contents in Ginkgo. Hg concentrations in fossil cuticular samples (with an average concentration of 585.5 ng.g(-1)) were observed notably higher than those in modern Ginkgo leaves (avg. 61 ng.g(-1)) and sediments from the same layers (avg. 113 ng.g(-1)). Considering possible Hg migration during fossilization, we suggested that the elevated Hg concentrations in fossil cuticles were attributed to both the retention of Hg in leaves and the loss of leaf content during fossilization. Based on 23 fossil ginkgoalean samples from 6 beds of the Dameigou section (spanning from the Early to the Middle Jurassic), Qaidam Basin, China, we detected a Hg anomaly through Hg concentrations in fossil cuticles during the presumed palaeo-volcanic event (the Karoo-Ferrar Large Igneous Province (LIP)). This preliminary test supports the notion that variations in Hg concentrations in fossil cuticle may potentially reflect the gaseous Hg changes in the Jurassic palaeo-atmosphere, triggered by LIP volcanism at this time. This finding highlights the possibility of using fossil plant cuticle as a Hg proxy of palaeo-atmospheric Hg loading.
WOS关键词TOTAL GASEOUS MERCURY ; ATMOSPHERIC MERCURY ; STOMATAL DENSITY ; FOSSIL PLANTS ; BILOBA L. ; TIBETAN PLATEAU ; LEAF CHARACTERS ; CARBON-DIOXIDE ; QAIDAM BASIN ; CO2
资助项目National Natural Science Foundation of China (NSFC)[42330208] ; National Natural Science Foundation of China (NSFC)[42488201] ; National Natural Science Foundation of China (NSFC)[41702004] ; National Natural Science Foundation of China (NSFC)[41790454] ; National Natural Science Foundation of China (NSFC)[42002023] ; Chinese Academy of Sciences[XDB26000000] ; State Key Laboratory of Palaeobiology and Stratigraphy[20191103] ; State Key Laboratory of Palaeobiology and Stratigraphy[20192101] ; State Key Laboratory of Palaeobiology and Stratigraphy[213112] ; China Scholarship Council[202006190261]
WOS研究方向Physical Geography ; Geology ; Paleontology
语种英语
WOS记录号WOS:001240051900001
出版者ELSEVIER
资助机构National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; State Key Laboratory of Palaeobiology and Stratigraphy ; China Scholarship Council
源URL[http://ir.nigpas.ac.cn/handle/332004/43845]  
专题中国科学院南京地质古生物研究所
通讯作者Wang, Yongdong; Ruhl, Micha
作者单位1.Univ Dublin, Trinity Coll Dublin, Dept Geol, Coll Green, Dublin 02, Ireland
2.Chinese Acad Sci, Nanjing Inst Geol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
3.Shenyang Normal Univ, Coll Paleontol, Shenyang 110034, Peoples R China
4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
5.Univ Chinese Acad Sci, Nanjing Coll, Nanjing 210006, Peoples R China
6.Univ Dublin, Trinity Coll Dublin, Earth Surface Res Lab ESRL, Dublin, Ireland
7.Univ Dublin, Dept Geol, Dublin, Ireland
8.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Li,Wang, Yongdong,Ruhl, Micha,et al. Plant cuticle as a possible palaeo-Hg proxy: Implications from Hg concentration data of extant Ginkgo L. and extinct ginkgoaleans[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2024,647:14.
APA Zhang, Li.,Wang, Yongdong.,Ruhl, Micha.,Kovacs, Emma Blanka.,Xu, Yuanyuan.,...&Chen, Hongyu.(2024).Plant cuticle as a possible palaeo-Hg proxy: Implications from Hg concentration data of extant Ginkgo L. and extinct ginkgoaleans.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,647,14.
MLA Zhang, Li,et al."Plant cuticle as a possible palaeo-Hg proxy: Implications from Hg concentration data of extant Ginkgo L. and extinct ginkgoaleans".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 647(2024):14.

入库方式： OAI收割

来源：南京地质古生物研究所

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