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。
Palynological records of Xipu section reveal the local vegetational and environmental history within the last 16000aBP. A very low total Sporepollen 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.
出处
《地质力学学报》
CSCD
2003年第2期171-175,共5页
Journal of Geomechanics
基金
国家自然科学基金资助项目(编号:40002014)
国土资源部基础项目(20010202 4)。
关键词
阳原西堡剖面
孢粉分析
植被发展
环境发展
历史
Yangyuan
Xipu section
Paleovegetation
environment
Palynological records
