气候变化领域集成服务门户(CCPortal): An inter-comparison study of three stomatal-proxy methods for CO2 reconstruction applied to early Jurassic Ginkgoales plants

CCPortal

DOI	10.1016/j.palaeo.2019.109547
	An inter-comparison study of three stomatal-proxy methods for CO2 reconstruction applied to early Jurassic Ginkgoales plants
	Zhou N.; Wang Y.; Ya L.; Porter A.S.; Kürschner W.M.; Li L.; Lu N.; McElwain J.C.
发表日期	2020
ISSN	0031-0182
卷号	542
英文摘要	The inverse relationship between concentrations of CO2 in the atmosphere (pCO2) and the stomatal index of vascular plant has been widely used to estimate ancient levels of atmospheric CO2. However, some atmospheric concentration of CO2 in the geological past (paleo-CO2) estimates show little congruence because they are derived using different correlative methods, or from different fossil plant species with different calibration approaches. Here we apply three methods, including (1) the empirical method of McElwain (1998), (2) the empirical method of Barclay and Wing (2016) and (3) the mechanistic method of Franks et al., (2014) to a single fossil Ginkgo species (Ginkgoites marginatus) to track and assess their consistency of pCO2 estimates for the Early Jurassic. By using an inter-comparison of three methods, a high degree of consistency in pCO2 estimates and trends has been observed in two empirical proxy methods. In addition, the mechanistic method and both the empirical methods also show generally good consistent paleo-CO2 estimates at the bed-level. To test the congruence of paleo-CO2 estimates, we also apply all three methods to one additional Ginkgoalean fossil species (Sphenobaiera huangii). All three methods show species-dependent uncertainty in paleo-CO2 estimates when applied to different Ginkgalean fossil species collected from the same fossiliferous bed. Moreover, considering the potential effect of guard cell size to the mechanistic method, the genome size of fossil and living Ginkgo taxa was analyzed based on the significant positive relationship between genome size and guard cell size. The result demonstrates that a likely occurrence of polyploidy in Sphenobaiera huangii may result in underestimated paleo-CO2 when applying mechanistic method due to an increase in the size of the stomatal complex. © 2019 Elsevier B.V.
英文关键词	Carbon isotope; Guard cell size; Polyploidy; Stomatal density; Whole genome duplication
语种	英语
scopus关键词	Ginkgoales; Ginkgoites marginatus; Sphenobaiera; Tracheophyta
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150604
作者单位	Department of Geology, Northwest University, Xi'an, 710069, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, 210008, China; Department of Botany, School of Natural Sciences, Trinity College Dublin, the University of Dublin, Dublin 2, Ireland; Department of Geosciences, University of Oslo, Oslo, N-0316, Norway
推荐引用方式 GB/T 7714	Zhou N.,Wang Y.,Ya L.,et al. An inter-comparison study of three stomatal-proxy methods for CO2 reconstruction applied to early Jurassic Ginkgoales plants[J],2020,542.
APA	Zhou N..,Wang Y..,Ya L..,Porter A.S..,Kürschner W.M..,...&McElwain J.C..(2020).An inter-comparison study of three stomatal-proxy methods for CO2 reconstruction applied to early Jurassic Ginkgoales plants.Palaeogeography, Palaeoclimatology, Palaeoecology,542.
MLA	Zhou N.,et al."An inter-comparison study of three stomatal-proxy methods for CO2 reconstruction applied to early Jurassic Ginkgoales plants".Palaeogeography, Palaeoclimatology, Palaeoecology 542(2020).