Temporary ice microalgae community in Taganrog Bay of the Azov Sea

Ковалева, Галина; Povazhnyy, V.; Zolotareva, A. E.; Makarevich, Pavel R; Матишов, Д. Г.

doi:10.1134/s0001437014050087

Cited by 2 publications

(1 citation statement)

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“…The activity of microbial eukaryotic microalgae in sea ice is influenced by environmental variables, such as temperature, salinity, nutrient concentrations and partial pressure of carbon dioxide ( p CO 2 ), all of which differ significantly from the seawater situation [ 15 , 16 ]. Eukaryotic microalgae in high-latitude waters may have adapted to the low temperature and sea ice environment [ 17 ], and some of them exhibit high biological activity in sea ice [ 18 ]. In contrast, a eukaryotic microalgal community in mid-latitude nearshore waters may not have developed effective coping strategies for sea ice formation, especially when sea ice formation and melting occur within a short period of time.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cold-Surge-Induced Nearshore Seawater Icing on the Eukaryotic Microalgal Community in Aoshan Bay, Qingdao

Bian

Guo

et al. 2022

Microorganisms

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Climate change has led to frequent cold surges in mid-latitudes, resulting in sudden temperature drops and icing of nearshore seawater, which may be affecting the eukaryotic microalgal community. In this paper, we investigated the differences between a eukaryotic microalgal community in sea ice and in seawater during the seawater freezing, due to the cold surge in Aoshan Bay, Qingdao, China, in January 2021. The results showed that the eukaryotic microalgal community in the sea ice and in the seawater was similar in composition at the phylum and genus levels, but that its relative abundances differed. In the seawater, the eukaryotic microalgal genera were dominated by Chaetoceros, while its relative abundance was significantly lower in the sea ice, probably because the cold-surge-induced seawater icing existed only for a short period of time, and Chaetoceros had not yet adapted to the rapid environmental changes in the sea ice. The relative abundance of Bathycoccus in the sea ice was higher, and showed a significant positive correlation with nitrite and silicate, while the relative abundance of Micromonas in the sea ice was also significantly higher than in the seawater, which may be related to the elevated CO2 concentration in the sea ice. This study demonstrates that although the seawater icing due to the cold surge was short, it may have affected the seawater eukaryotic microalgal community, to a certain extent.

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