Samples from Diatom communities in Ny Alesund, Svalbart 2015


Kayaalp J., Bizsel N., Bizsel K. C.

MARDI workshop: Harmonisation of(sub)Arctic diatom taxonomy Location:, Helsinki, Finland, 6 - 08 June 2023

  • Publication Type: Conference Paper / Unpublished
  • City: Helsinki
  • Country: Finland
  • Dokuz Eylül University Affiliated: Yes

Abstract

The aim of the study was to identify composition of Diatoms communities since the data would have been used in Meso- and Microcosm study to be carried out on the very same site in the frame of EU project called as OC (Ocean Certain). The samples collected along Kongsfjorden and some glacial lakes in Ny Ålesund, Svalbard in 2015.

For an Arctic fjord in 2015, the variations in phytoplankton abundances showed that the phytoplankton community was mainly dominated by some small single cell Diatoms. The most abundant species were of genus Cyclotella, i.e., C. atomus, C. atomus var. atomus, C. atomus var. marina. Among them, C. ocellata which is a good indicator for the environments where shorter ice covers and longer growing seasons occur. Among pennate species of which belonged to the genera Fragilaria, Navicula, Achnanthes, Cocconeis and Diploneis were also abundant ones. Another remarkable finding was for the glacial lakes in which the occurrences of species of several pennate genera such as, Navicula, Fragilaria, Diatoma, Achnanthes, Diploneis and Cymbella. There were also species of Cyclotella, i.e., C. ocellata and C. antiqua. All those species expectedly can provide some contribution to the main goal of this workshop which we are able to provide LM and SEM images together with some less abundant and debatable ones.

In Arctic phytoplankton abundance was ranged about 100.000-1.500.000 cells/l. Because of their small sizes, it is somewhat difficult to pronounce a diatom dominancy by considering their contribution to total phytoplankton abundance. Phytoplanktonic carbon values ranged 7 - 40 C mg/l in the Kongensfjorden. Diatom’s contribution ranged around 0,2-0,7 C mg/l while their maximum values reached in Glacial Lake; about 100 C mg/l.