Arctic: ecology and economy
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Home Archive of journals Volume 11, No. 3, 2021 Long-term hydrochemical changes and Harmful Algal Blooms in the Arctic Lake Imandra


JOURNAL: Volume 11, No. 3, 2021, p. 327-340

HEADING: Ecology

AUTHORS: Kashulin, N.A., Bekkelund, A.., Dauvalter, V.A.

ORGANIZATIONS: Institute of North Industrial Ecology Problems of the Kola Science Centre of the RAS, Creek-Bio AB

DOI: 10.25283/2223-4594-2021-3-327-340

UDC: 504.052+504.4.054

The article was received on: 25.03.2021

Keywords: water quality, heavy metals, nutrients dynamics, Arctic lake, Imandra, harmful algae bloom (HAB)

Bibliographic description: Kashulin, N.A., Bekkelund, A.., Dauvalter, V.A. Long-term hydrochemical changes and Harmful Algal Blooms in the Arctic Lake Imandra. Arktika: ekologiya i ekonomika. [Arctic: Ecology and Economy], 2021, vol. 11, no. 3, pp. 327-340. DOI: 10.25283/2223-4594-2021-3-327-340. (In Russian).


The large arctic Imandra Lake is located in the industrial Murmansk region, Russia. Since the 2000s it has regular Harmful Algal Blooms. Significant changes in hydrochemical indices were recorded in 1985—2017. The ratio of the main ions has changed, the pH and alkalinity have increased. The indicators of water salinity, the total content of P and N, and their mineral forms have decreased. The concentrations of Zn, Cu, Ni  SO42– have decreased as well. The decrease trends in the content of macronutrients in waters contradict traditional concepts and the role of mineral P and N in the development of HAB. This indicates more complex mechanisms of flowering in this arctic reservoir, which are being discussed.

Finance info: The work was carried out according to the state assignment on the research work theme No. 0226-2019-0045 with the support of the Russian Foundation for Basic Research in the framework of the project 18-05-60125 Large lakes of the Arctic in the context of global and regional changes in the environment and climate.


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DOI 10.25283/2223-4594