Reconstruction of Terrestrial environment with using the internal anatomy of fossil plants.

利用植物化石的内部解剖结构重建陆地环境。

• 批准号: 13640475
• 负责人: SAIKI Ken'ichi
• 金额: $ 2.82万
• 依托单位: Natural History Museum and Institute, Chiba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640475/
• 关键词: China; Mongolia; Mesozoic; fossil plants; Xinxyueoxylon; terrestrial paleoclimate; paleovegetation; Ashicaulis; イチョウ; マツ; 珪化; 球果; ゼンマイ; 根茎; ソテツ

The main purpose of this project is the reconstruction of the terrestrial environment with using the internal anatomy of fossil plant remains.In north eastern China, We collect several gymnosperm and fern fossils from the Mesozoic deposits. We described gymnosperm trunk Xinxyueoxylon from the Jurassic of Liaoning Province. Anatomical features of this specimen show both cycad-like and medulosans-like characters. Hypothesis of the evolutionary way from medulosans to cycad have been discussed since 1950's. However, no fossil evidence which connects these two taxa have been found. Thus this specimen is important to reconstruct the phylogeny of gymnosperms. We also describe osmundaceous fern Stem from the middle Jurassic of Hebei province. This specimen belongs to the fossil stem genus Ashicaulis. Based on specimen and literature search of Ashicaulis species, we find that this genus is flourished only under the Warm temperate and Winter wet dimatic condition. Thus this genus can be used as a indicator of paleoclimate. Terrestrial climate of fossil sites may belongs to these climatic condition.In Mongolia, we described fossil plants from the lower Cretaceous of paleo-Choyr basin. We described ferns, lycopsids, equistetaleans, and conifers. No angiosperm was discovered. Based on both these mega fossil plants records and previous palynomorph works, we reconstruct the paleovegetation of paleo-Choyr basin. In the Cretaceous time, central part of this basin is fern marsh and surrounding highland is covered with conifer forests. We also estimate the natural primary product(NPP) of this vegetation based on modem counter part and reconstruct the energy flow of paleoecosystem of this basin.

The main purpose of this project is the reconstruction of the terrestrial environment with using the internal anatomy of fossil plant remains.In north eastern China, We collect several gymnosperm and fern fossils from the Mesozoic deposits.我们描述了辽宁省侏罗纪的裸子植物树干新雪木。该标本的解剖特征显示出苏铁类和髓类的特征。从 medulosans 到苏铁的进化方式的假说自 20 世纪 50 年代以来一直在讨论。然而，尚未发现连接这两个类群的化石证据。因此，该标本对于重建裸子植物的系统发育很重要。我们还描述了河北省中侏罗世的紫薇蕨茎。该标本属于 Ashicaulis 属的化石茎。通过对Ashicaulis属的标本和文献检索，我们发现该属仅在暖温带和冬季湿润的气候条件下繁盛。因此，该属可以用作古气候的指标。化石地点的陆地气候可能属于这些气候条件。在蒙古，我们描述了来自古乔尔盆地白垩纪下层的植物化石。我们描述了蕨类植物、石松植物、马术植物和针叶树。没有发现被子植物。根据这些巨型植物化石记录和之前的孢粉形态工作，我们重建了古乔尔盆地的古植被。在白垩纪时期，该盆地的中心部分是蕨类沼泽，周围的高地覆盖着针叶林。我们还根据现代对应物估算了该植被的自然初级产品（NPP），并重建了该盆地古生态系统的能量流。

项目成果

Saiki K., Zhang Wu, Wang Y.D., Zheng S.L.: "New data of the Middle Jurassic tree fern fossil from Liaoning China"Abstract for the annual meeting of chinese palaeobotanical committee with special celebration of Pfor. Li Xingsxue's 85th birthday. 1 (2002)

Saiki K.，张武，王Y.D.，郑S.L.：“中国辽宁中侏罗世树蕨化石新资料”中国古植物学委员会年会特别庆祝Pfor的摘要。

Early Cretaceous terrestrial ecosystems in East Asia based on food-web and energy-flow models

• DOI: 10.1016/j.cretres.2005.11.010
• 发表时间: 2006-04
• 期刊: Cretaceous Research
• 影响因子: 2.1
• 作者: M. Matsukawa;K. Saiki;Makoto Ito;I. Obata;D. Nichols;M. Lockley;Reiji Kukihara;K. Shibata

Lower Cretaceous flora of the Choyr Basin, Mongolia

• DOI: 10.1016/j.cretres.2005.11.003
• 发表时间: 2006-04
• 期刊: Cretaceous Research
• 影响因子: 2.1
• 作者: K. Saiki;A. Okubo

Zhang W., Zheng S.L., Saiki, K., Wang W.D.: "New material of Cycadoid fossil wood from the Middle Jurassic In western Liaoning, China"Abstract for the annual meeting of chinese palaeobotanical committee with special celebration of Pfor. Li Xingsxue's 85th

张文，郑世林，齐木康，王文德：“中国辽西中侏罗世苏铁木化石新材料”中国古植物学委员会年会暨Pfor特别庆典摘要。