Paleoecological Study of Taiwan (5)-Toushe Basin
Paleoecological Study of Taiwan (5)-Toushe Basin
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台湾古生态研究（五）-头社盆地
DOI：
10.6165/tai.1977.22.1
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发表时间：
1977
影响因子：
2.3
通讯作者：
Tseng
中科院分区：
文献类型：
--
作者：
Shu;Tseng
为了探讨台湾中部地区的植被历史、古气候变迁及早期人类活动，本研究以头社盆地为研究地点，采自下至82公尺及31公尺厚泥炭层的沉积物，共计40个样品。采用化学反絮凝法提取花粉粒，石蜡包埋制备永久性玻片。根据对永久性滑坡的分析，提出了本区植被历史和古气候的假设：自湖泊形成以来，本区一直处于暖温带时期。除A带（8200-7100 cm）、C1亚带（5900-5300 cm）等少量花粉带外，其余各亚带均有不同程度的花粉分布。C3分区（5150-4800 cm）和C5分区（4200-3900 cm）。从71 m深度开始，B1亚带（7100-6750 cm）为Quercus-Symplocos-Pasania-Alnus群丛，Gramineae-Compositae-Typha亚群丛，B2亚带（6750-5900 cm）为Quercus-Pasania-Alnus-Salix-Carpinus群丛。禾本科-莎草科亚群丛; C2分区（5300-5150 cm），Pasania-Quercus-Myrica-Symplocos群丛，禾本科-莎草科亚群丛; C4亚带（4800-4200 cm），Pasania-Quercus-Myrica-Symplocos-Ligustrum-Engelhardtia群丛，禾本科-莎草科亚群丛：C6亚带（3900-3100 cm），Pasania-Quercus-Myrica-Symplocos-Ilex-Salix-Engelhardtia群丛，禾本科-莎草科亚群丛;分区D1（3100-1600 cm），赤杨-山矾群丛，禾本科-莎草科亚群丛; D2亚带（1600-1350 cm），赤杨-山矾-女贞-冬青群丛，禾本科菊科亚群丛; D3亚带（1350-975 cm），Pasania-Quercus-Alnus-Symplocos-Ilex-Salix-Ulmaceae-Mallotus群丛，禾本科-莎草科亚群丛; E带（975 cm），枫香-野桐-松-榆/榉树群丛，禾本科-莎草科亚群丛。3850年B。P.）、以及850厘米处有燃烧痕迹的木材碎片（约3400年B。P.）4500年以来沉积物的沉积速率急剧上升，我们认为早在4500年前就有早期人类进入该地区砍伐森林。
In order to investigate the vegetational history paleoclimatic change and the activity of early man in Central Taiwan, the Toushe Basin was selected as a site for palynological studyFrom the sediments extending down to 82 m and through 31 m of thickpeat, 40 samples were taken for this study. The palynomorphs were extracted by chemical deflocculation, then permanent slides were prepared by sealing with paraffin. Based on the examination of the permanent slides, a hypothesis for the vegetational history and past climate is proposed as follows:A warm temperate period has prevailed in this area ever since the formation of the lake. Except for scanty pollen zones such as Zone A (8200-7100 cm), Subzone C1 (5900-5300 cm). Subzone C3 (5150-4800 cm) and Subzone C5 (4200-3900 cm). successive series of plant communities have been found as follows: starting at a depth of 71 m, we find that Subzone B1 (7100-6750 cm), has a Quercus-Symplocos-Pasania-Alnus association, Gramineae-Compositae-Typha subassociation; Subzone B2 (6750-5900 cm), Quercus-Pasania-Alnus-Salix-Carpinus association. Gramineae-Cyperaceae subassociation; Subzone C2 (5300-5150 cm), Pasania-Quercus-Myrica-Symplocos association, Gramineae-Cyperaceae subassociation; Subzone C4 (4800-4200 cm), Pasania-Quercus-Myrica-Symplocos-ligustrum-Engelhardtia association, gramineae-Cyperaceae subassociation: Subzone C6 (3900-3100 cm), Pasania-Quercus-Myrica-Symplocos-Ilex-Salix-Engelhardtia association, Gramineae-Cyperaceae subassociation; Subzone D1 (3100-1600 cm), Alnus-Symplocos association, Gramineae-Cyperaceae subassociation; Subzone D2 (1600-1350 cm), Alnus-Symplocos-Ligustrum-Ilex association, Gramineae Compositae subassociation; Subzone D3 (1350-975 cm), Pasania-Quercus-Alnus-Symplocos-Ilex-Salix-Ulmaceae-Mallotus association, Gramineae-Cyperaceae subassociation; and Zone E (975 cm-surface), Liquidambar-Mallotus-Pinus-Ulmus/Zelkova association, Gramineae-Cyperaceae subassociation.From the evidences of charcoal at 670 cm (ca. 3850 years B. P.), and wood fragments with burning traces at 850 cm (ca. 3400 years B. P.) and a steep rise in deposition rate of sediments since 4500 years ago, we suggest that early man may have come into this district to clear the forest as early as 4500 years ago.