论文部分内容阅读
以一个４０ｃｍ长泥炭岩芯的气相色谱（ＧＣ）和气相色谱－质谱（ＧＣ－ＭＳ）分析为基础，结合现有的湖相记录资料，提出苔藓植物Ｃ２３正构烷烃主峰标志了一种寒冷气候的信息．现代苔藓植物化学成分与气候关系的分析，以及生态学上有关气候影响生物生长方式的资料，支持了泥炭中仅在第２个小冰期出现 Ｃ２３正构烷烃呈指数形式变化的现象与寒冷气候有关这一结论，显示了这一相当常见的分子化石可以高精度地记录气候变迁的非常信息．酮／酯比值、Ｃ２４正构单烯烃／Ｃ２４正构烷烃比值，与生物分布具有很好的对应关系，标记了苔鲜植物与单子叶被子植物之间的取代关系．
Based on gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) analysis of a 40 cm long peat core and the existing records of lacustrine facies, it was suggested that the main peak of the C23 n-paraffins in bryophytes marked a cold climate Information. The analysis of the relationship between the chemical composition of modern bryophytes and climate and the ecological information on climate-influenced biological growth patterns support the fact that the phenomenon of exponential change of C23 n-alkanes in the pelagus only in the second small ice age is related to the cold climate This conclusion shows that this rather common molecular fossil records extraordinary information on climate change with high precision. Ketone / ester ratio, C24 n-monounsaturated / C24 n-alkane ratio, which has a good correspondence with the biodistribution and marks the substitution relationship between mossy plants and monocotyledonous angiosperms.