Palaeoecological and palaeoenvironmental significance of someimportant spores and micro-algae in Quaternary deposits  

作　　者：TANG LingYu MAO LiMi Lü XinMiao MA QingFeng ZHOU ZhongZe YANG ChunLei KONG ZhaoChen BATTEN David J 

机构地区：[1]State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences [2]Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences [3]University of Chinese Academy of Sciences [4]School of Resources and Environmental Engineering, Anhui University [5]Institute of Botany, Chinese Academy of Sciences [6]School of Earth, Atmospheric and Environmental Sciences, University of Manchester

出　　处：《Chinese Science Bulletin》2013年第25期3125-3139,共15页

基　　金：supported by the National Natural Science Foundation of China (40971029, 41072251 and 41171162);Knowledge Innovation Project of the Chinese Academy of Sciences (KZCX2-YW-155);the Open Foundation of State Key Laboratory of Palaeobiology and Stratigraphy (113106)

摘　　要：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.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.

关 键 词：第四纪沉积物 古环境意义 微型藻类 孢子形态 古生态 蕨类植物 石灰性土壤 生物多样性 

分 类 号：P52[天文地球—古生物学与地层学]