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| 1 | 第四纪沉积物中重要蕨类孢子和微体藻类的古生态环境指示意义显示文摘类型丰富的蕨类孢子与微体藻类在第四纪沉积物中频繁出现,然而对其中的大部分蕨类孢子和重要微体藻类所蕴含的古生态与古环境信息仍缺乏深入分析与研究.论文详细地总结和分析了其中的7种(属)重要的化石孢子和微体藻类的形态学特征、产地、时代、分布区域及其古生态环境指示意义,即中华卷柏(Selaginella sinensis (Desv.)Spring,1843)、水蕨(Ceratopteris cf.thalictroides (L.)Brongn,1821)、短棘盘星藻(Pediastrum boryanum (Turp.)Meneghini,1840)、单角盘星藻(P.simplex Meyen,1829)、整齐盘星藻(P.integrum Ngeli,1849)、刺甲藻属(Spiniferites Mantell,1850,emend Strjeant,1970)以及环纹藻属(Concentricystes Rssignal 1962,emand Jiabo,1978).除环纹藻属的系统位置仍存疑之外,其他化石类型中所对应的植物视其亲缘关系可归属到相应的自然科属.它们分别属于蕨类植物卷柏科(Selaginellaceae)的卷柏属(Selaginella Spring)、水蕨科(Parkeriaceae)的水蕨属(Ceratopteris Brongn)、绿藻门水网藻科(Hydrodictyaceae)的盘星藻属(Pediastrum)、沟鞭藻类刺甲藻科(Spiniferitaceae)以及疑源类系统位置未定亚类的环纹藻属.这些蕨类孢子和微体藻类的植物体往往适应特定的生境,除中华卷柏适应温干气候条件或温暖偏湿的山坡或林下阴处石灰质土壤环境条件外,其他均为与水体环境紧密相联的水生植物.水蕨、盘星藻和环纹藻属于淡水种,适宜在各种大小型自然湖沼湿地和水田、水沟等人工湿地生长和繁殖;刺甲藻则生活在近海海域中,属于咸水种.它们在我国第四纪地层的沉积物中含量丰富,而且在有些层位中个体浓度非常高,因此,这些适应特定生境的蕨类植物和微体藻类成为阐述第四纪古生态与古环境的强有力证据. | 唐领余 毛礼米 吕新苗 马庆峰 周忠泽 杨春蕾 孔昭宸 BATTEN David J. | 2013 | 科学通报2013，58，20： | 29 |
| 2 | Palaeoecological and palaeoenvironmental significance of someimportant spores and micro-algae in Quaternary deposits显示文摘Spores of ferns and allied plants, and micro-algae frequently occur in abundance in Quaternary deposits, but their palaeoenvironmental significance is seldom evaluated. This paper presents morphological descriptions of spores of Selaginella sinensis (Desv.) Spring, 1843 (Selaginellaceae) and Ceratopteris cf. thalictroides (L.) Brongniart, 1821 (Parkeriaceae) and the algae Pediastrum boryanum (Turpin) Meneghini, 1840, P. simplex Meyen, 1829, P. integrum N geli, 1849 (all Hydrodictyaceae), Spiniferites Mantell, 1850, emend. Sarjeant, 1970 (Spiniferitaceae) and Concentricystes Rossignal, 1962, emend. Jiabo, 1978 (systematic position unclear), and discusses their occurrence in mostly Quaternary sedimentary successions. All are closely associated with aquatic habitats. Extant Selaginella sinensis often colonizes fairly wet hillsides and gaps between rocks, and shady sides of ravines and slopes; it is also found within thickets of trees and shrubs (boscages) and in forests with calcareous soils. Ceratopteris thalictroides, Pediastrum and Concentricystes inhabit freshwater lakes and both natural and artificial wetlands, such as paddy fields and ditches. Spiniferites is a salt-water genus and usually associated with the marine realm. Fossil and subfossil representatives of all of these taxa can be useful proxies of biodiversity and, therefore, also important for determining environmental conditions during the Quaternary period. | TANG LingYu MAO LiMi Lü XinMiao MA QingFeng ZHOU ZhongZe YANG ChunLei KONG ZhaoChen BATTEN David J | 2013 | Chinese Science Bulletin2013，58，25： | 9 |
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