珍稀濒危植物珙桐的生存与人为活动的关系应用生态学报.PDF

应 用 生 态 学 报 　2000 年 8 月 　第 11 卷 　第 4 期 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 ( ) CHIN ESE J OU RNAL OF A PPL IED ECOL O GY ,Aug. 2000 ,11 4 ∶493～496 珍稀濒危植物珙桐的生存与人为活动的关系 ( 中国科学院生态环境研究中心 ,北京 100085) 吴 　刚 　肖　寒 　李 　静 　马克明　 【摘要】　近年来 , 由于人类活动的加剧 ,区域开发项 目的增多 ,致使珍稀濒危树种珙桐的天然分布面积和天然 种群数量急剧下降 ,现天然分布种群已濒临灭绝. 为此 ,本文系统分析了珙桐在不同地质阶段和不同历史阶段 的地理分布状况 ,探讨了促使其地理分布及种群数量动态变化的主要原因. 通过大面积的野外调查和查阅资 料 ,提出了珙桐的保护措施. 关键词 　珙桐 　种群 　人口密度 　保护措施 Relationship bet ween human activities and survival of rare and endangered species D avi di a involucr at a . WU Gang , XIAO Han ,L I J ing and MA Keming ( R esearch Center f or EcoEnv i ron mental S ciences , Chinese A cademy of S ciences , ) ( ) Beijing 100085 . Chin . J . A pp l . Ecol . ,2000 ,11 4 :493～496 . In recent years ,t he increasing intensity of human activities and t he increase of regional developing items led to a sharp decrease of natural distributed area and natural population number of rare and endangered sp ecies D av idia invol ucra ta , and now , it s natural distributed population is on t he point of extinction . This p ap er analyzed t he geograp hic distri bution situation of D av idia invol ucrata in different geologic and historical p eriods ,and discussed t he major reasons for forming t he geograp hic distribution and dynamic changes of population . Through many field investigations and refer ences ,some protecting measures were presented . Key words 　D av idia invol ucrata , Population , Population density , Proteting measures.