Abstract

The study of diatoms (Bacillariophyta) collected in 2000–2001 with a plankton net from the hypersaline Kara-Bogaz-Gol Bay revealed 13 species and varieties of the genera Campylodiscus, Cocconeis, Diploneis, Epithemia, Navicula, Nitzschia, Planothidium, Surirella, and Tryblionella. These diatoms occurred at water salinities from 44 to 250‰. Consequently, salt-tolerance limits were extended for most taxa: 11 species and varieties previously considered in the literature as less salt-tolerant appeared to be halophilous. Planothidium cf. lanceolatum, Epithemia sorex and Nitzschia dissipata differed from their diagnoses by a smaller number of striae on their valves (9–11, 10–12 and 25–35 striae in 10 μm, respectively). P. cf. lanceolatum, Surirella brebissonii var. kuetzingii, and Tryblionella compressa are the first records for the Caspian Sea.

中文翻译：

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里海 Kara-Bogaz-Gol 湾的硅藻（Bacillariophyta）：新数据

摘要

硅藻收集2000 - 2001年从高盐度卡拉Bogaz-Gol海湾浮游生物网研究（硅藻）表明，13种和品种属Campylodiscus，Cocconeis，Diploneis，Epithemia，舟形，菱形，Planothidium，双菱，和锥菌属。这些硅藻出现在盐度为 44 到 250 ‰ 的水体中。因此，大多数分类群的耐盐极限得到了扩展：文献中先前认为耐盐性较差的 11 个物种和品种似乎是嗜盐的。Planothidium比照。披针叶，Epithemia sorex和Nitzschia dissipata与他们的诊断不同，它们的瓣膜上的条纹数量较少（分别为 10 μm 中的9-11、10-12和25-35 个条纹）。P.参见 披针草, Surirella brebissonii var. kuetzingii和Tryblionella compressa是里海的第一批记录。