PALYNOLOGICAL RECORDS IN XIPU SECTION,YANGYUAN
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摘要: 通过对阳原西堡剖面的孢粉分析,得到16000年以来该地区植被与环境发展的历史。约16000~11000aBP期间,植被是以蒿和藜为主的干旱草原景观,气候寒冷而干燥;约11000~9000aBP期间,植被有一定的增长,气候变得温凉稍湿;约9000~4800aBP期间,气温上升湿度下降,植被呈现疏林草原景观;距今4800aBP以来,植被虽然仍以草原为主,但低花粉浓度指示环境条件又趋于恶劣,气候进一步向暖干方向发展。Abstract: Palynological records of Xipu section reveal the local vegetational and environmental history within the last 16000aBP. A very low total Spore-pollen concentration indicates a grassland vegetation and cold~dry climate at Ca. 16000~11000aBP interval; A number of tree pollen grains found at Ca. 11000~9000aBP might be explained as a result of expansion of forests somewhere around the Xipu. This change must have caused by climatic warming and wetting in this time interval;the vegetation was dominated by sparse sylvosteppe at Ca. 9000~4800aBP, correspongding to the increasing temperature and decreasing humidity;During the last 4800aBP, the vegetation have remained as the grassland,but the decreasing concentration of the pollen might mean a reduction of forests and worsening environment around Xipu.
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Key words:
- Yangyuan /
- Xipu section /
- Paleovegetation /
- environment /
- Palynological records
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