A Novel Gymnosperm Wood from the Lopingian (Late Permian) in Zhangzi, Shanxi, North China and Its Paleoecological and Paleogeographic Implications

IF 4.1 2区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Journal of Earth Science Pub Date : 2024-02-01 DOI:10.1007/s12583-021-1510-3

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Abstract

The Permian-Triassic transition saw extreme climatic changes that severely impacted the terrestrial ecosystem. Fossil plants, particularly fossil woods, are sensitive to climatic changes, and they, therefore, are unique materials revealing extreme environmental and climatic changes on land at that time. Abundant conifer woods were discovered in the Lopingian (Late Permian) strata of the Sunjiagou Formation in Shanxi Province, North China. The newly finding permineralized woods record the unique landscape of Lopingian North China. They represent a new conifer genus and species: Shanxiopitys zhangziensis gen. et sp. nov. Analyses of growth pattern and anatomical characteristics of the fossil woods indicate these trees grew under optimal growing conditions, and without seasonal growth cessation. However, climate signals from leaf fossils, vertebrate fossils and sedimentary evidences indicate a strongly seasonal climate in North China during the Lopingian. Thus, it is speculated that these trees likely lived in the gallery forests, which were distributed along the paleo-rivers within a seasonal landscape in the central North China block during the Lopingian.

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华北山西张子罗平迭纪（晚二叠世）的一种新型杂色木及其古生态学和古地理学意义

摘要二叠纪-三叠纪过渡时期的极端气候变化严重影响了陆地生态系统。植物化石，尤其是林木化石，对气候变化非常敏感，因此是揭示当时陆地极端环境和气候变化的独特材料。在华北山西省孙家沟地层的侏罗纪（晚二叠世）地层中发现了大量针叶林。新发现的过矿化木记录了华北侏罗纪的独特地貌。它们代表了一种新的针叶树属和树种：Shanxiopitys zhangziensis gen.对化石林的生长模式和解剖特征的分析表明，这些树木是在最佳生长条件下生长的，没有季节性生长停止。然而，来自叶化石、脊椎动物化石和沉积物证据的气候信号表明，华北地区在侏罗纪时期存在强烈的季节性气候。因此，推测这些树木很可能生活在廊道林中，廊道林沿着古河流分布在华北中部罗平期的季节性地貌中。

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来源期刊

Journal of Earth Science 地学-地球科学综合

CiteScore

5.50

自引率

12.10%

发文量

128

审稿时长

4.5 months

期刊介绍： Journal of Earth Science (previously known as Journal of China University of Geosciences), issued bimonthly through China University of Geosciences, covers all branches of geology and related technology in the exploration and utilization of earth resources. Founded in 1990 as the Journal of China University of Geosciences, this publication is expanding its breadth of coverage to an international scope. Coverage includes such topics as geology, petrology, mineralogy, ore deposit geology, tectonics, paleontology, stratigraphy, sedimentology, geochemistry, geophysics and environmental sciences. Articles published in recent issues include Tectonics in the Northwestern West Philippine Basin; Creep Damage Characteristics of Soft Rock under Disturbance Loads; Simplicial Indicator Kriging; Tephra Discovered in High Resolution Peat Sediment and Its Indication to Climatic Event. The journal offers discussion of new theories, methods and discoveries; reports on recent achievements in the geosciences; and timely reviews of selected subjects.