中国北方典型灌丛群落表土花粉组合特征  

Surface pollen assemblages from typical shrub communities in North China

作　　者：许清海[1] 李月丛[1] 赵登海 阳小兰 郑振华 郝明亮 

机构地区：[1]河北师范大学资源与环境学院,河北石家庄050016 [2]内蒙古贺兰山国家自然保护区管理局,内蒙古巴音浩特750306 [3]河北省地理科学研究所,河北石家庄050011 [4]河北省小五台山国家级自然保护区,河北蔚县075700

出　　处：《古地理学报》2006年第2期157-164,共8页Journal of Palaeogeography：Chinese Edition

基　　金：科学技术部基础研究重大项目前期研究专项项目(批准号:2003CCA01800);国家自然科学基金项目(批准号:40171095;40571166);河北省自然科学基金项目(批准号:402616);国家自然科学基金重点项目(批准号:40331011)联合资助

摘　　要：来自中国北方20个典型灌丛群落的54个表土样品的花粉组合特征研究表明除蒿及沙棘灌丛外,其它灌丛中的优势植物种类在表土花粉组合中的百分比多数低于20%。阔叶林区灌丛与荒漠区和草原区灌丛表土花粉组合差别较大。阔叶林区灌丛中常有一定量的中华卷柏,蒿属和藜科百分比之和低于40%,花粉类型多样性指数多高于2.0;而草原区及荒漠区中华卷柏很少出现,蒿藜百分比高于50%,花粉类型多样性指数多低于2.0。落叶阔叶林区灌丛花粉组合中,松蒿比(P/A)大于0.1,而草原及荒漠区灌丛则小于0.1,但草原区灌丛蒿藜比(A/C)大于1,荒漠区则小于1。将松蒿比(P/A)与蒿藜比(A/C)、花粉类型多样性指数联合起来可较好地将荒漠、草原及落叶阔叶林区灌丛分开。Abstract This study collected pollen assemblages for 54 surface pollen samples from 20 typical shrub communities in North China. The study results show that the pollen percentages of most dominant shrub plants, except Artemisia and Hippophae, are usually less than 20% . The pollen assemblages of shrubs in different ecological areas differ greatly. As to most of the shrubs in forest zone, the spores of Selaginella sinensis are common or abundant, and the pollen percentages of Artemisia and Chenopodiaceae are less than 40 %, their pollen type diversity index is usually higher than 2.0. As to the shrub communities in steppe or desert zones, the spores of Selaginella sinensis are rare, and the pollen percentages of Artemisia and Chenopodiaceae are more than 50 %, the pollen type diversity index is usually lower than 2.0. The ratio of Pinus to Artemisia （P/A）is higher than 0.1 in forest zones, while lower than 0.1 in steppe and desert zones. However the ratio of Artemisia to Chenopodiaceae （A/C）is higher than 1 in steppe area and lower than 1 in desert area. So if the ratio of Pinus to Artemisia （P/A）, that of Artemisia to Chenopodiaceae （A/C）, and pollen type diversity index are considered together, the different ecological areas can be differentiated from one another easily.

关 键 词：中国北方 灌丛群落 表土花粉组合 松蒿比 蒿藜比 花粉类型多样性指数 

分 类 号：Q913.84[天文地球—古生物学与地层学]