| 古湖沼学中的化石硅藻—80年代以来研究进展 |
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| 引用本文： | 杨世蓉,吉磊.古湖沼学中的化石硅藻—80年代以来研究进展[J].湖泊科学,1994,6(2):177-187. |
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| 作者姓名： | 杨世蓉 吉磊 |
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| 作者单位： | 中国科学院南京地质古生物研究所 南京210008(杨世蓉)，中国科学院南京地理与湖泊研究所 南京210008(吉磊) |
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| 摘 要： | 化石硅藻由于其丰度高、壳体易于保存,对环境变化敏感、分布范围广等特点,已成为古湖沼学研究中的重要研究手段。80年代以来国际上湖泊硅藻研究在以下几方面得到迅速发展:(1)系统分类;(2)与环境因子的关系;(3)湖泊酸化、富营养化;(4)气候变化;(5)转换函数;(6)再沉积作用和溶解作用;(7)与色素对比分析等。我国湖泊化石硅藻研究起步较晚,80年代以来已积累了一些研究资料,近年来此项研究已开始受到重视和加强。
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| 关 键 词： | 古湖沼学 研究进展 硅藻化石 |
| 收稿时间： | 1993/5/31 0:00:00 |
| 修稿时间： | 9/4/1993 12:00:00 AM |
Fossil diatom studies in paleolimnology: Developments since the 1980s |
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| Yang Shirong and Ji Lei.Fossil diatom studies in paleolimnology: Developments since the 1980s[J].Journal of Lake Science,1994,6(2):177-187. |
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| Authors: | Yang Shirong and Ji Lei |
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| Institution: | Nanjing Institute of Geology and Paleontology, Chinese Acodemy of Sciences, Nanjing 210008 and Nanjing Institute of Geography and Limnology, Chinese Acodemy of Sciences, Nanjing 210008 |
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| Abstract: | The role of fossil diatom study in paleolimnology is to analogize the ancient lakes, reconstruct their lake envirnmental evolution histories and find out lake function and lake variation regularities based upon the distribution, ecology and environmental condition of living diatom flora in modern lakes, and upon some other organic and inorganic indicators and dating data as well. Diatom has become an important tool in paleolimnological studies due to its high abandance, well-preserved frustule, sensitivity to changing environments, wide distribution and uncomplicated identification.Initial researches on paleoenvironments of lacustrine fossil diatoms began at the middle nineteenth century. The subject has being forged rapidly since the 1980s, including 7 major aspects as follows: (1) systematic classification of diatoms, (2) relationship between diatoms and environmental factors, (3) diatoms and lake acidification and eutrophication, (4) diatoms and climatic changes, (5) transfer function between diatoms and water chemistry, (6) influence of reworking and dissolution on diatom distribution, and (7) correlation of diatoms and sedimentary pigments.Fossil diatom studies began rather late in China. There accumulated some research data in the past twenty years , including mainly: (1)fossil diatoms in Tertiary diatomaceous earth deposits, (2) fossil diatoms in plateau lakes in Xizang (Tibet), and (3) Quaternary lacustrine fossil diatoms and environmental changes. guice the academic level is quite lower as compared with the modern international level, The Chinese paleontological and Quaternary geological fields have to strengthen the studies on lacustrine fossil diatoms and their environmental significance. |
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| Keywords: | Fossil diatom paleolimnology research development |
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