| 引用本文: | 羊向东,王苏民,吉磊,沈吉,马燕.固城湖晚全新世以来的孢粉组合及环境变迁.湖泊科学,1994,6(3):233-239. DOI:10.18307/1994.0306 |
| Yang Xiangdong,Wang Sumin,Ji Lei,Shen Ji,Ma Yan.Spore-pollen assemblage and environmental change of Gucheng Lake since late holocene. J. Lake Sci.1994,6(3):233-239. DOI:10.18307/1994.0306 |
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| 摘要: |
| 本文依据固城湖GD钻孔系统的孢粉分析资料,将井深6.3m岩心所做的孢粉图式,结合14C测年,从下面上分为8个孢粉组合带,进而论述了4000年来该区的植被发展和气候的4次冷暖交替的变化。4次冷期约为3.0-2.5KaB.P、2.0-1.5KaB.P.、1.0-0.8KaB.P.和0.4Ka以来。此外,还根据沉积物中的硅藻分析、有机质δ13C值、有机碳含量及历史记载等资料,侧重讨论了气候及人类活动对湖泊环境演变的影响。 |
| 关键词: 固城湖 孢粉组合 植被 气候环境 晚全新世 |
| DOI：10.18307/1994.0306 |
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| 基金项目:中国科学院南京地理与湖泊研究所湖泊沉积与环境开放研究实验室资助项目(910003) |
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| Spore-pollen assemblage and environmental change of Gucheng Lake since late holocene |
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Yang Xiangdong, Wang Sumin, Ji Lei, Shen Ji, Ma Yan
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Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008
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| Abstract: |
| Gucheng Lake, situated in the southeast of Gaocheng County, Jiangsu Province, surrounded by mixed evergreen/deciduous broad,leaved forests, lies between the north and middle subtropical zone in monsoon Asia area.This paper deals mainly with the systematic palynological research on more than 57 samples from a column core with a depth of 6.2m in Gucheng Lake.According to the spore-pollen diagram, 8 assemblage zones have been distinguished in an ascending order as followss 1.Cyclobalanopsis-Casianea-Liquid ambar zone(6.3-5.lm);2.Pinus-Querous-Polypodiaceae zone (5.1-4.15m);3.Cyclobalanopsis-Graminea-Typha zone (4.15-3.2m);4.Greunines-Artemisia-Quercus zone(3.2-2.3m);5.Quercus-Pinus-Castaned zone (2.3-1.75m);6.Graminea-Artemisia-Quercus zone (l.75-1.lm);7.Quercus-Pinus-Caslanea zone(l.1-0.45m);8.Pinus-Graminea-Artemisia zone(0.45-0m) From the above statement, 8 phases of the paleovegetation succession and climate fluctuation seem to be shown in the past 4000 years, and 8 climate periods can be listed in the ascending order for convenience of correlation: 1.3700-3000 a B.P.: warmer and moist;2.3000-2500 a B.P.: temperate-cool and a little wet;3.2500-2000 a B.P.: warm and wet;4.2000-1500 a B.P.: temperate-cool and a little wet;5.1500-1000 a B.P.;warm and wet;6.1000-800 a B.P.: temperate-cool and a little dry;7.800-500 a B.P.;temperate and wet;8.500a B.P.-present: cool and a little dry.Moreover, according to the analysis of stable carbon isotope of organic matter, TOC, diatom and historical records, the influence of climate and human activity on environment is also discussed. |
| Key words: Gucheng Lake spore-polJen assemblage vegetation climate and environment late Holocene |
