小五台山北台北坡植被垂直带的表土花粉及其气候意义研究

在对小五台山北台北坡垂直带的植被进行全面考察的基础上，建立了垂直带的表土花粉谱，分析了白扦、华北落叶松和桦等物种的气候指示意义。研究表明：桦属和松属在表土中的花粉百分含量大于群落中植物的盖度，具超代表性；云杉的花粉百分含量与植物在群落中的盖度基本符合；落叶松由于花粉产量低，保存能力差，则具有低代表性。就其气候指示意义来说，白扦指示冷湿生境，华北落叶松指示冷干生境。桦属的生态幅度较宽，其中风桦最耐寒，白桦较耐旱。

Surface Pollen and Its Climatical Significance of Vertical Zone in Beitai,Xiaowutai Mountain

After a broad survey of the vertical zone in Beitai,Xiaowutaishan mountain, a surface pollen spectrum is established.The climatical significance of some important species,such as Picea meyeri,Larix principis ruprechtii and Betula is also analysed.This research demonstrated:Surface pollen content of Betula and Pinus is much more than their coverage in community,so they have extra representation; Surface Pollen content of Picea is corresponded with its coveragein community;Because Larix has low pollen productivity and bad preservation ability of pollen,it has low representation for its coverage in community.As for their climatical significance, Picea meyeri indicates cool wet habitat; Larix principis ruprechtii indicates cool dry climate; Betula has a broad ecological amplification, Betula albo sinensis has a natural inclination for cool climate, Betula platyphylla has a natural inclination for dry climate.