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

doi:10.1016/j.palaeo.2024.112214

NIGPAS OpenIR

	*Plant cuticle as a possible palaeo-Hg proxy: Implications from Hg concentration data of extant Ginkgo* L. and extinct ginkgoaleans**
通讯作者	Wang, Yongdong(ydwang@nigpas.ac.cn) ; Ruhl, Micha(ruhlm@tcd.ie)
	Zhang, Li 1,2,3; Wang, Yongdong1,4,7 ; Ruhl, Micha 8; Kovacs, Emma Blanka ; Xu, Yuanyuan 1,5; Zhu, Yanbin 1,5; Lu, Ning 6; Chen, Hongyu 1,5
	2024-08-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	647 页码:14
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.
关键词	Gaseous mercury concentration Foliar/cuticular Hg concentration Ginkgoaleans Fossil cuticles Early Jurassic Karoo-Ferrar Large Igneous Province
DOI	10.1016/j.palaeo.2024.112214
收录类别	SCI
语种	英语
关键词[WOS]	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
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:001240051900001
项目资助者	National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences ; State Key Laboratory of Palaeobiology and Stratigraphy ; China Scholarship Council
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/43846
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.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Univ Dublin, Dept Geol, Dublin, Ireland 3.Univ Dublin, Trinity Coll Dublin, Earth Surface Res Lab ESRL, Dublin, Ireland 4.Univ Chinese Acad Sci, Nanjing Coll, Nanjing 210006, Peoples R China 5.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 6.Shenyang Normal Univ, Coll Paleontol, Shenyang 110034, Peoples R China 7.Chinese Acad Sci, Nanjing Inst Geol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 8.Univ Dublin, Trinity Coll Dublin, Dept Geol, Coll Green, Dublin 02, Ireland
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.