| 英文摘要 |
The samples for this palynological study were taken from a sedimentary deposit in the central part of the Taipei Basin, namely the Taipei Botanical Garden. Soil was sampled to a depth of 44.8 m. and covered all ranges of the Sungshan Gravel Deposit. According to the different sediments, 16 samples were chosen for study. The soil composition was analysed by the methods of Bouyoucus (1936) and Day (1950, 1953). Pollen grains were extracted by chemical deflocculation by a modified Nakamura's method (1967), then permanent slides were prepared and sealed with paraffin. Based on the examination of all the permanent slides, a hypothesis was formulated for the successive series of plant communities of the Taipei Basin based on the Sungshan Deposit from about 380,000 to 4,500 years B. P. as follow: Palmae, Cycadaceae, Cyperaceae of Tropical sunny wet lands elements (43.5 m.)→Fagaceae, Moraceae, Theacae, Elaeocarpaceae of Subtropical with increasing cool temperate forest elements (36.5-31.9m.)→Aceraceae, Fagaceae, Theaceae, Aquifoliaceae, Betulaceae and Elaeocarpaceae of Warm temperate forest (23.6-19.3 m.)→Betulaceae, Cyperaceae of Subtropical forest elements (16.6 m.)→Aquifoliaceae, Pinaeae, Juglandaceae and Trochodendraceae of Warm temperate forest (15.7-13.6 m.)→Fagaceae, Betulaceae, Myricaeae, Pinaceae of Subtropical forest (11.5-9.3 m.)→Myricaceae, Elaeocarpaceae, Pinaceae, Betulaceae, Fagaceae of Subtropical forest elements (7.2-1 m.) |
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