Abstract

Diatoms from small waterbodies of polygonal microrelief tundra on Tit-Ary Island (the lower reaches of the Lena River) have been studied using scanning electron microscopy (SEM) for the first time. A total of 160 taxa belonging to 48 genera, 25 families, 13 orders, and 3 classes—including 55 taxa new for the flora of the Lena river basin, 46 taxa new for Yakutia, and 13 taxa identified only to the genus—have been found in the phytoperiphyton. The highest diversity of Bacillariophyta is found in a shallow lake at the north end of the island. More than 100 species and varieties of diatoms are detected there, including 29 species and varieties new for the flora of Yakutia. Achnanthidium minutissimum, Caloneis silicula, Cocconeis euglypta, C. pediculus, C. placentula, Cymbella artica, C. neocistula, Eunotia faba, E. praerupta, Gomphonema acuminatum, Hantzschia amphioxys, Navicula cryptocephala, Stauroneis anceps, Tabellaria fenestrata, T. flocculosa, Ulnaria ulna, and Caloneis silicula were found to be dominant in the waterbodies under study.

中文翻译：

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北极苔原中水体的硅藻藻类

摘要

首次使用扫描电子显微镜（SEM）研究了Tit-Ary岛（Lena河的下游）多边形微浮雕苔原小水体上的硅藻。共有属于48个属，25个科，13个目和3类的160个分类单元，其中包括55个有关Lena流域植物群的新分类单元，46个针对Yakutia的新分类单元和13个仅属该分类的分类单元。在植物浮游植物中发现。在岛的北端的一个浅湖中发现了芽孢杆菌的多样性最高。那里发现了100多个硅藻物种和变种，其中包括雅库特（Yakutia）植物区系中新发现的29个物种和变种。草 Caloneis silicula，Cocconeis euglypta，C. pediculus，C.placentula，Cymbella artica，C.neocistula，Eunotia faba，E. praerupta，Gomphonema acuminatum，Hantzschia amphioxys，Navicula cryptocephala，Stauroneis anceps，bell，Tabellaria fenestrata。在研究的水体中发现了硅藻和卡尼利斯硅藻（Caloneis silicula）占主导地位。