Quercus (subg. Cyclobalanopsis) leaf and cupule species in the late Miocene of eastern China and their paleoclimatic significance
Quercus (subg. Cyclobalanopsis) leaf and cupule species in the late Miocene of eastern China and their paleoclimatic significance
复制标题
中国东部晚中新世栎属（青冈亚属）叶和壳斗物种及其古气候意义
DOI：
10.1016/j.revpalbo.2015.01.011
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发表时间：
2015-08-01
影响因子：
1.9
通讯作者：
Sun, Bainian
中科院分区：
文献类型：
--
作者：
Jia, Hui;Jin, Peihong;Sun, Bainian
根据化石上的树叶和橡实，可以追溯到东亚晚始新世。本文将浙江东部天台地区中新世上部的叶片和橡子化石的新发现与两个新种（Quercus paraglauca sp. nov.和Quercus heterobracteolata sp. nov. Q. heterobracteolata是中国最早确认的环青冈亚属橡子化石）进行了比较。对文献报道的其他分布情况进行了回顾，发现青冈亚属的分化不迟于始新世，而在中新世青冈已广泛分布。通过对其最近的亲缘种（NLR） Q， glauca的角质层结构的比较表明：1)中新世晚期大气CO2浓度约为400 ppmv，高于现在的自然CO2浓度，消除了工业的影响；2)毛毛碱密度对环境变化较为敏感；3)晚中新世浙江（中国东部）的气候比今天更加温暖和湿润。(C) 2015 Elsevier B.V.版权所有
The fossil record of Quercus subgenus Cyclobalanopsis can be traced back to the Late Eocene of eastern Asia based on fossil foliage and acorns. We refer new occurrences of leaf and acorn fossils from the upper Miocene of Tiantai, eastern Zhejiang, China, to two new species, Quercus paraglauca sp. nov. and Quercus heterobracteolata sp. nov. Q. heterobracteolata represents the earliest confirmed fossil acorn of the subgenus Cyclobalanopsis in China. A review of other occurrences reported in the literature reveals that the divergence of subgenus Cyclobalanopsis occurred not later than the Eocene, and in the Miocene Cyclobalanopsis was already widely distributed. Comparisons of cuticular structure between Q. paraglauca and its nearest living relative species (NLR) Q, glauca suggest that: 1) atmospheric CO2 concentration in the late Miocene was ca. 400 ppmv, i.e. higher than the present natural CO2 concentration, eliminating the industrial influence; 2) the Q. glauca trichome base density is sensitive to the environmental changes; and 3) the late Miocene climate of Zhejiang (eastern China) was warmer and more humid than today. (C) 2015 Elsevier B.V. All rights reserved.