Akademik Veri Yönetim Sistemi
MARDI workshop: Harmonisation of(sub)Arctic diatom taxonomy Location:, Helsinki, Finlandiya, 6 - 08 Haziran 2023
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.