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作 者 ：徐景先 王宇飞 杨健 普光荣 张翠芬

期 刊 ：植物学通报 2000年 17卷 专辑期 页码：84-94

关键词：云南；第三纪植物群；古气候；

摘 要 ：根据已有大化石和孢粉植物群的研究，从植物区系和类群两个层次上，对云南第三纪植物群发展和气候变迁进行了分析。结果表明云南第三纪古新世时为干旱亚热带气候，气温较晚白垩世低；始新世为潮湿的南亚热带气候，气温比古新世高；渐新世为亚热带气候，气温比始新世低；中新世为亚热带气候，气温比渐新世高；上新世为湿润—半湿润的亚热带气候，气温下降。这种变化趋势与MiHer等根据大西洋和太平洋海底第三纪底栖和浮游有孔虫的氧同位素记录分析第三纪全球气温变化趋势及赵秀兰等根据孢粉资料定量分析中国第三纪古气候变化趋势基本一致。目前国际上古植被与古气候变迁关系的研究已从定性描述向定量化研究的方向发展。90年代以来，Wolfe与Mosbtugger分别发展的CLAMP和Coexistence Approach是利用化石植物定量化研究古气候的两种新方法，可用于定量化研究云南第三纪植物与古气候变迁，将是后续工作的重要方向。

Abstract:On the basis of mega and microfossil records, the flora of Yunnan Province has been studied in order to reveal the Tertiary floral evolution and climatic change. Succession of the vegetation types indicates a progression from arid and subtropical climates in the Paleocene with temperatures lower than those of the late Cretaceous; humid and south subtropical climate in the Eocene with temperatures higher than those of the Paleocene; subtropical climate during the Oligocene and with temperatures lower than those of the Eocene; humid subtropical climate in the Miocene with temperatures higher than those of the Oligocene; humid, semi-humid and subtropical climates during the Pliocene with temperatures become lower than previously recorded. This tendency is consistent with Miller‘s analysis of Tertiary global paleoclimate change identified from oxygen isotope records in benthic and planktonic foraminifera. The CLAMP analysis and methods of floral coexistence are two comparatively new methods for quantitative reconstruction of Tertiary. terrestrial paleoclimates which rely on data from fossil plants. Using these approaches will enhance Tertiary paleoclimate analyses from Yunnan Province considerably and change the style of analysis from qualitative to quantitative.

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