从自然变化过程中分离人类活动的探讨——以山东利津剖面为例
Distinction of human activities from natural processes——With reference to Lijin Profile, Shandong, China
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摘要: 根据一天然剖面的炭屑、孢粉、年代学分析结果,研究了2500a以来的气候变化过程.在详细历史资料基础上,通过对比发现的炭屑异常峰值与历史上几次人口增殖和火灾有关,某些孢粉种属的变化则可能是人类耕种的结果.这说明只要提高研究的分辨率,对于人类活动事件是可以把它从自然变化过程中分离出来的,这对改造环境、恢复生态是非常重要的.Abstract: On the basis of the results of analyses of charcoal debris,spores and pollen,and chronologic datings in a natural profile,the climatic changes during the last 2 500 a are reconstructed.According to comparison of the results of analysis with the detailed historical records,the abnormal peak values of charcoal content in the profile are related to the population booms and fire hazards in time sequence in the history.The changes of some species of spores and pollen might have been the results of human cultivation.The result indicates that the influence of human activities can be distinguished from natural evolution processes by improving the resolution of analysis,which is significant to the improvement of environment and the restoration of ecosystem.
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