circumboreal diatom navicula streckerae lange-bert. & witk., especially on lineolae

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ID: 143376
2012
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Abstract
Navicula streckerae was recorded in two locations of northern Germany and the Arctic Ocean. According to the findings of this taxon from Lake Khovsgol (Mongolia) and Kamchatka (Russia) by our investigations, this taxon distributed northward from latitude 50°N. on the Eurassian Continent and is considered to be a circumboreal diatom. This taxon is divided into three types, namely the Arctic Ocean type, the Weser River type and the Kinzig River type according to the valve morphology. In this study we compare these three types in the samples from Europe and Kamchatka focusing on the valve form and sizes. Though the density of lineolae composing striae is one of the important characteristics to classify the species, there are few records of this point. We investigate this point in detail in the specimens from Europe and Kamchatka. Consequentry the two extreme values, short striae forming the cental area and the area including Voigt discontinuities, should be excluded when measuring the density of lineolae to obtain a stable value.
Reference Key
fukushima2012antarcticcircumboreal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Hiroshi Fukushima;Tsutomu Kimura;Tsuyako Ko-Bayashi;Sakiko Yoshitake;E.V. Lepskaya
Journal revista facultad nacional de agronomía medellín
Year 2012
DOI
10.15094/00009662
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