Relationship between algae and environment: an Early Cretaceous case study, Trascău Mountains, Romania
Relationship between algae and environment: an Early Cretaceous case study, Trascău Mountains, Romania
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DOI：
10.1007/s10347-005-0001-9
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发表时间：
2005-08
期刊：
影响因子：
1.8
通讯作者：
I. Bucur;Emanoil Sǎsǎran
中科院分区：
文献类型：
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作者：
I. Bucur;Emanoil Sǎsǎran
本文研究了贝里亚期-瓦兰期灰岩序列中藻类与沉积环境的关系。几个沉积环境的记录，从浅潮下到潮间带和潮上，盐度范围从正常的海洋淡水和/或超咸水。藻类组合主要由毛枝藻、河藻和轮藻组成，并有少量的日本藻和小问题杆菌。Dasycladaleans与潮下、有时限制（“泻湖”）环境有关，而类似河流动物的蓝细菌和轮藻分别以潮间-潮上环境和新鲜和/或超盐环境为特征。在Dasycladaleans中，Salpingoporella annulatais通常与限制环境有关，在那里它形成单种组合。在潮下带高能沉积物（生物碎屑颗粒岩）中发现了大型dasycladaleans，如Selliporella neocomiensis，Macroporella praturloni和Pseudocymopolia jurassica。环境与藻类之间的关系，每个沉积单元的特点，可以用来解释相对海平面的变化。
The relationship between algae and depositional environment was studied in a limestone succession of Berriasian–Valanginian age. Several depositional environments were recorded from shallow subtidal to intertidal and supratidal, with salinity ranging from normal marine to fresh and/or supersaline water. The algal assemblages consist mainly of dasycladaleans, rivulariacean-type cyanobacteria and charophytes.Nipponophycus(Bryopsydales) andLithocodium-Bacinella(microproblematicum), occur at some levels. Dasycladaleans are associated with subtidal, sometimes restricted (“lagoonal”) environments, while rivulariacean-like cyanobacteria and charophytes characterise intertidal-supratidal and fresh and/or supersaline environments, respectively. Among the dasycladaleans,Salpingoporella annulatais often related to restricted environments where it forms monospecific assemblages. Large dasycladaleans, such asSelliporella neocomiensis,Macroporella praturloniandPseudocymopolia jurassicaare found in subtidal high-energy deposits (bioclastic grainstones). The relationship between environment and algae, characteristic for each depositional unit, can be used to interpret the relative sea-level variations.