中国东部两个中新世植物区系的叶性状资料及其古气候意义

IF 2 4区 地球科学 Q1 Earth and Planetary Sciences
Wenlong He, A. Roth-Nebelsick, Bainian Sun
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引用次数: 0

摘要

新近纪古气候的研究支持了我们对当前气候变化的影响和后果的认识。然而,中新世气候发展的许多方面和细节仍不清楚。树叶化石是古气候代用数据的宝贵而丰富的来源。本文从古气候和叶片经济学的角度研究了中国东部两个中新世的植物群——透皮植物群和胜县植物群。生县植物区系可追溯至下托尔顿期,而图皮植物区系可追溯至布尔迪亚利安和朗吉安之间。对于古气候,采用了气候叶片分析多元程序(CLAMP)。此外,还纳入了与叶片寿命密切相关的重要性状叶面积质量(LM A),并进行了形态计量学计算。这两个站点的数据显示气候主要是温暖湿润的,年平均气温(MAT)值在13 ~ 17°C之间。此外,LM - A显示两个遗址的常绿植被,与鉴定的化石和古气候相一致。然而,这项研究得出的结论是,在较冷的季节,嵊县的气温较低。这可能表明,中新世中期至晚,由于气候的轻微降温和东亚季风的增强,该地点的温度季节性较强
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Leaf trait data of two Miocene floras from eastern China and its palaeoclimate implications
The study of Neogene palaeoclimate supports our understanding of effects and consequences of current climate changes. However, many aspects and details of Miocene climate development are still unclear. Fossil leaves are a valuable and rich source of palaeoclimate proxy data. In this contribution, two Miocene leaf assemblages from eastern China, the Toupi flora and the Shengxian flora, were studied with respect to palaeoclimate and leaf economics. Whereas the Shengxian flora is dated to the lower Tortonian, the Toupi flora dates to approximately the border between Burdigalian and Langhian. For palaeoclimate, Climate Leaf Analysis Multivariate Program (CLAMP) was applied. In addition, Leaf Mass per Area (LM A ), an essential leaf trait strongly correlated to leaf longevity, was included and was calculated morphometri-cally. For both sites, the data indicated a principally warm and humid climate, with Mean Annual Temperature (MAT) values between 13 and 17 °C. Also, the LM A indicates evergreen vegetation for both sites, consistent with the identified fossils and palaeoclimate. For Shengxian, however, this study concludes there was a lower temperature in the cooler season. This might possibly indicate a stronger temperature seasonality for this site due to slight climate cooling and East Asian monsoon intensification from the middle to late Miocene
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来源期刊
Palaeontologia Electronica
Palaeontologia Electronica 地学-古生物学
CiteScore
3.60
自引率
0.00%
发文量
20
审稿时长
>12 weeks
期刊介绍: Founded in 1997, Palaeontologia Electronica (PE) is the longest running open-access, peer-reviewed electronic journal and covers all aspects of palaeontology. PE uses an external double-blind peer review system for all manuscripts. Copyright of scientific papers is held by one of the three sponsoring professional societies at the author''s choice. Reviews, commentaries, and other material is placed in the public domain. PE papers comply with regulations for taxonomic nomenclature established in the International Code of Zoological Nomenclature and the International Code of Nomenclature for Algae, Fungi, and Plants.
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