北京房山东甘池15000年以来炭屑分析及对火发生可能性的探讨

CHARCOAL ANALYSIS AND FIRE CHANGES AT DONGGANCHI OF FANGSHAN IN BEIJING SINCE 15000 YEARS B.P.

火是森林和草原生态系统的重要因子。本文通过北京房山东甘池１５０００ａＢ．Ｐ．沉积物的炭屑、孢粉及烧失量（ＬＯＩ）的分析，试图讨论北京地区１５０００ａＢ．Ｐ以来火发生的可能性，提出火与植被中某些成分的相互关系及影响火发生的一些因素，同时结合考古和历史地理资料说明人类活动引起火灾的情形和程度。

Fire is one of the major environmental factors in forest and grassland ecosystems.Based on the results of analysing charcoal,pollen and lossonignition(LOI) in 15000 a B.P.sediments in Dongganchi,this paper deals with the possibility of fire occurring since 15000 a B.P. in Beijing.The time series analysis was used to infer patterns of fire as well as relationship between fire and some plants.In the meantime,other factors resulting in fire were considered.In addition,the man's effect on fire playing was discussed according to archaeological and historical material.