Response to paleoatmospheric CO_2 concentration of Solenites vimineus(Phillips)Harris(Ginkgophyta)from the Middle Jurassic of the Yaojie Basin,Gansu Province,China  

作　　者：YAN DeFei SUN BaiNian XIE SanPing LI XiangChuan WEN WenWen 

机构地区：[1]Key Laboratory of Western China’s Environmental Systems of the Ministry of Education,Lanzhou University,Lanzhou 730000,China [2]LPS,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008,China

出　　处：《Science China Earth Sciences》2009年第12期2029-2039,共11页中国科学（地球科学英文版）

基　　金：Supported by National Basic Research Program of China(No.2006CB701401);National Natural Science Foundation of China(Nos.40502005,40772012,40802008);State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences)(Grant No.093110)

摘　　要：Solenites vimineus (Phillips) Harris (Ginkgophyta) specimens with well-preserved cuticles were collected from five different beds in the oil shale member of the Middle Jurassic Yaojie Formation in the Yaojie Basin, Gansu Province, northwestern China. Gross morphology and fine structures of the fossil leaves were studied, and stomatal parameters were analyzed, according to which, the paleoatmospheric CO2 concentration can be deduced as 1512-1896 ppm that would have caused an increase in mean temperature of about 6.5-7.4℃. Carbon isotopes from the fossils indicate that the carbon isotopic discrimination and water use efficiency (WUE) of S. vimineus were raised nearly obtaining the ideal physiologic state in increased CO2 concentrations and temperature conditions, suggesting that S. vimineus records the paleoenvironmental information of the Middle Jurassic Yaojie Basin and can be used for environmental reconstruction.Solenites vimineus (Phillips) Harris (Ginkgophyta) specimens with well-preserved cuticles were collected from five different beds in the oil shale member of the Middle Jurassic Yaojie Formation in the Yaojie Basin, Gansu Province, northwestern China. Gross morphology and fine structures of the fossil leaves were studied, and stomatal parameters were analyzed, according to which, the paleoatmospheric CO2 concentration can be deduced as 1512-1896 ppm that would have caused an increase in mean temperature of about 6.5-7.4℃. Carbon isotopes from the fossils indicate that the carbon isotopic discrimination and water use efficiency (WUE) of S. vimineus were raised nearly obtaining the ideal physiologic state in increased CO2 concentrations and temperature conditions, suggesting that S. vimineus records the paleoenvironmental information of the Middle Jurassic Yaojie Basin and can be used for environmental reconstruction.

关 键 词：Solenites vimineus stomatal parameters paleo-CO_(2)concentration carbon isotopes Middle Jurassic northwestern China 

分 类 号：Q914[天文地球—古生物学与地层学]