被子植物叶脉密度对古气候的指示：以榉和润楠化石为例

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	被子植物叶脉密度对古气候的指示：以榉和润楠化石为例
Alternative Title	Leaf venation density of Angiosperm as a paleoclimatic proxy: taking fossils of Zelkova and Machilus for instance
	王雪莲
Thesis Advisor	孙柏年
	2014-05-21
Degree Grantor	兰州大学
Place of Conferral	兰州
Degree Name	学士
Keyword	叶脉密度中新世榉属润楠属古气候浙江
Abstract	利用叶脉密度来分析植物与环境因素的关系，已成为一项新的且重要的研究。使用一维分析法和二维分析法，统计分析了化石翁格榉（Zelkova ungeri Kovats）和天台润楠（Machilus tiantaiensis Ding S. T. et Sun B. N.）及其现生亲缘种大叶榉（Z. Schneideriana Hand.-Mazz.）和润楠（M. Pingii Cheng ex Yang）的叶脉密度，并探讨了现生植物大叶榉（Z. Schneideriana）和润楠（M. pingii）叶脉密度对环境因素的反应，比较了化石植物与现生亲缘种的叶脉密度。结果表明，大叶榉（Z. Schneideriana）和润楠（M. pingii）的叶脉密度随降雨量的增大而增大，相关性显著；二者的叶脉密度与温度的相关性不显著。化石翁格榉（Z. ungeri）和天台润楠（M. tiantaiensis）的叶脉密度分别大于其现生亲缘种的叶脉密度，推论浙江东部中新世晚期的降雨量大于现在的降雨量，这两种化石被子植物所处的古气候具有水分充足、气候湿润的特征。
Other Abstract	Making use of vein density to study the relationship between plants and environment is an important content on the study of palaeoclimate and palaeoenvironment. In this paper, the vein density of fossil plants Zelkova ungeri Kovats, Machilus tiantaiensis Ding S. T. et Sun B. N. Sp. nov.and their NLR were analysed by applying the one-dimensional analysis and two-dimensional analysis approaches. And how the vein density responses to the environment variation was discussed. Furhter, the differences of the vein density between the fossil and extant leaves were compared. The results indicated that the vein density of Z. Schneideriana Hand.-Mazz. and M. Pingii Cheng ex Yang increased closely along with the increase of precipitation, while was not closely related with the variation of temperature. The vein density of Z. Schneideriana and M. tiantaiensis was respectively higher than that of their NLRs. Thus we deduced that the precipitation in eastern Zhejiang Province was higher than that of nowadays in the Late Miocene and the palaeoclimate was more humid at that time.
URL	查看原文
Language	中文
Document Type	学位论文
Identifier	https://ir.lzu.edu.cn/handle/262010/225618
Collection	数学与统计学院
Recommended Citation GB/T 7714	王雪莲. 被子植物叶脉密度对古气候的指示：以榉和润楠化石为例[D]. 兰州. 兰州大学,2014.

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