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在植物分类基础上全面调查了浙江舟山青浜岛分布的植物群落类型,获得8个群丛类型,对青浜岛25种现代植物植硅体进行提取,共鉴定出17种形态类型。帽型、齿型、哑铃型、鞍型和扇型主要见于禾本科植物;蕨类主要产波状棒型和三棱柱型;木本主要产纺锤型和多边形板状型,这表明不同分类位置的植物产生不同的植硅体形态及组合。对横跨整个青浜岛东南—西北坡向的8个群丛样方进行表土植硅体提取分析,共获得14种植硅体形态类型,研究结果显示表土植硅体贡献主要来自禾本科、蕨类、阔叶类和裸子类植物。随着岛屿山体海拔的增加(海拔20—90m),示冷型和示干旱型植硅体增加,青浜岛局部生境(自东南向西北翻过山顶)气候变化表现为温暖湿润—温凉偏干—温暖湿润。表土植硅体组合灵敏地响应了海拔改变而引起的局地植被和环境的变化,是重建第四纪环境变化的可靠代用指标。
On the basis of plant classification, the types of plant communities distributed in Qingbang Island, Zhoushan, Zhejiang Province were comprehensively investigated. Eight community types were obtained. Seventeen morphological types were identified from phytoliths of 25 modern plants in Qingbashi Island. Cap type, tooth type, dumbbell type, saddle type and fan type are mainly found in grasses; ferns are mainly wavy rod type and triangular prism type; woody main production spindle and polygon plate type, indicating that the location of different classification Plants produce different phytoliths and combinations. A total of 14 phytoliths were obtained from 8 cluster-like quadrats in the southeastern-northwesterly slope of the entire Qingbang Island. The results showed that the contribution of topsoil phytoliths mainly came from grasses, ferns Broadleaf and gymnosperm species. With the elevation of the mountainous islands (20-90m above sea level), the abundance of phyllostachys shows that the climate of the Qinghai Island local habitat (topped from southeast to northwest) is warm and humid Dry - warm and moist. The topsoil phyllosilicate assemblage responds sensitively to changes in local vegetation and environment caused by altitude changes and is a reliable surrogate indicator for reconstructing Quaternary environment.