兰州大学学报(自然科学版)
蘭州大學學報(自然科學版)
란주대학학보(자연과학판)
JOURNAL OF LANZHOU UNIVERSITY(NATURAL SCIENCES)
2010年
1期
14-21
,共8页
丁素婷%孙柏年%吴靖宇%李相传
丁素婷%孫柏年%吳靖宇%李相傳
정소정%손백년%오정우%리상전
化石角质层%气孔参数%碳同位素%CO_2体积分数%侏罗纪%甘肃华亭煤矿
化石角質層%氣孔參數%碳同位素%CO_2體積分數%侏囉紀%甘肅華亭煤礦
화석각질층%기공삼수%탄동위소%CO_2체적분수%주라기%감숙화정매광
fossil cuticle%stomatal parameter%carbon isotope%CO_2 concentration%jurassic%Huating Coal Mine,Gansu province
描述了甘肃华亭中侏罗世植物化石狭叶拟刺葵Phoenicopsis (Phoenicopsis) angustifolia Heer的角质层微细构造.利用化石的现存最近对应种Ginkgo biloba L.与化石Ph.(Ph.) angustifolia Heer的气孔比率,恢复的华亭中侏罗世的大气CO_2体积分数为1.274×10~(-3),这一结果与邻区兰州窑街银杏属化石植物恢复的中侏罗世CO_2体积分数相一致,表明拟刺葵属植物是恢复大气CO_2体积分数的良好材料,此外,利用Ph.(Ph.) angustifolia角质层碳同位素值估算了其水分利用率为223.0 mmol/mol,明显高于现代银杏的数值,表明当时气候比较湿润.
描述瞭甘肅華亭中侏囉世植物化石狹葉擬刺葵Phoenicopsis (Phoenicopsis) angustifolia Heer的角質層微細構造.利用化石的現存最近對應種Ginkgo biloba L.與化石Ph.(Ph.) angustifolia Heer的氣孔比率,恢複的華亭中侏囉世的大氣CO_2體積分數為1.274×10~(-3),這一結果與鄰區蘭州窯街銀杏屬化石植物恢複的中侏囉世CO_2體積分數相一緻,錶明擬刺葵屬植物是恢複大氣CO_2體積分數的良好材料,此外,利用Ph.(Ph.) angustifolia角質層碳同位素值估算瞭其水分利用率為223.0 mmol/mol,明顯高于現代銀杏的數值,錶明噹時氣候比較濕潤.
묘술료감숙화정중주라세식물화석협협의자규Phoenicopsis (Phoenicopsis) angustifolia Heer적각질층미세구조.이용화석적현존최근대응충Ginkgo biloba L.여화석Ph.(Ph.) angustifolia Heer적기공비솔,회복적화정중주라세적대기CO_2체적분수위1.274×10~(-3),저일결과여린구란주요가은행속화석식물회복적중주라세CO_2체적분수상일치,표명의자규속식물시회복대기CO_2체적분수적량호재료,차외,이용Ph.(Ph.) angustifolia각질층탄동위소치고산료기수분이용솔위223.0 mmol/mol,명현고우현대은행적수치,표명당시기후비교습윤.
Fossil Phoenicopsis(Phoenicopsis) angustifolia Heer was collected from the middle jurassic of Huating Coal Mine, Gansu province. The cuticle was observed under a light microscope and a scanning electron microscope. Based on the stomatal ratio of the nearest living equivalent species Ginkgo biloba L. to the present fossil, the CO_2 concentration in the middle jurassic at Huating was estimated at about 1.274×10~(-3). The estimated value of CO_2 concentration in the middle jurassic coincided with the results from the adjacent Yaojie area, which shows that the fossil plant of Phoenicopsis is suitable for paleoclimatic reconstruction. In addition, the water use efficiency of Ph.(Ph.) angustifolia is 223.0 mmol/mol, exceedingly higher than that of modern G. biloba, indicating a humid paleoclimate in the middle jurassic at Huating.