宁夏大罗山表土样品中主要花粉类型的代表性  

REPRESENTATION OF MAJOR POLLEN TAXA FROM SURFACE SAMPLES OF DALUOSHAN MOUNTAIN , NINGXIA

作　　者：伍婧[1] 马玉贞[2] 桑艳礼[2] 蒙红卫[2] 胡彩莉[2] 

机构地区：[1]北京大学城市与环境学院,北京100871 [2]北京师范大学环境演变与自然灾害教育部重点实验室,地表过程与资源生态国家重点实验室,北京100875

出　　处：《古生物学报》2013年第1期57-67,共11页Acta Palaeontologica Sinica

基　　金：国家自然科学基金面上项目(40871092;41071128);地表过程与资源生态国家重点实验室室内项目(2011-ZY-04)资助

摘　　要：基于宁夏大罗山(森林岛屿)及其周边地区69个样方的植被调查和表土花粉分析的数据,计算得到主要花粉类型的联合指数(A)、低代表性指数(U)、超代表性指数(O)和花粉百分比含量。通过分析表明:禾本科和蒿属花粉与植被的关系呈强相关,花粉的出现能够指示母体植物在当地的生长;桦木属、藜科、云杉属和松属花粉类型具超代表性,但若花粉百分比含量较高仍可以表征母体植物在当地的生长;菊科、蔷薇科、瑞香科、旋花科、榛属、莎草科、大戟科、唇形科、豆科、木樨科、杨属、柳属、蒺藜科和伞形科花粉与植被的关系呈弱相关,有一定的指示意义;十字花科和柽柳科花粉与植被无相关性,花粉的出现和百分比含量都不能作为母体植物出现的指标。以上结果可为化石孢粉记录的解释提供依据。The indices of association, under-representa- tion, over-representation and percentages of pollen were calculated based on 69 surface samples and vegetation data collected from Daluoshan Mountain （Forest Island） and surrounding area in Ningxia Hui Autonomous Region. Results show that Gramineae and Artemisia have a high association index. The presences of pollen grains probably indi- cate an enhanced growth of plants in the local area. Betula, Chenopodiaceae, Picea and Pinus are over-represented types and the high percentages ofpollen seem to indicate the existence of plants. Compositae, Rosaceae, Thymelaeaceae, Convolvu- laceae, Corylus, Cyperaceae, Euphorbiaceae, La- biatae, Leguminosae, Oleaceae, Populus, Salix, Zygophyllaceae and Umbelliferae show a weak association between the plants on the ground and their pollen equivalents. The presence of pollen has certain significance of indication. Cruciferae and Tamaricaceae have no association with the plants and the presence of pollen here should not be the indicator of the existence of plants. This study could provide a strong basis for the explanation of fossil pollen records.

关 键 词：花粉 植被 代表性指数 百分比含量 森林岛屿 大罗山 

分 类 号：Q948[生物学—植物学]