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Home Archive of journals Issue 3(31) 2018 Dependence of oxygen saturation on the a chlorophyll content in the surface layer of the White Sea

DEPENDENCE OF OXYGEN SATURATION ON THE A CHLOROPHYLL CONTENT IN THE SURFACE LAYER OF THE WHITE SEA

JOURNAL: 2018, 3(31), p. 31-41

RUBRIC: Ecology

AUTHORS: Netsvetaeva O.P., Korobov V.B., Makedonskaya I.Y., Zmetnaya M.I.

ORGANIZATIONS: P. P. Shirshov Institute of Oceanology of the Russian Academy of Sciences, LLC Agency of applied ecology, North Branch of Knipovich Polar Research Institute of Marine Fisheries and Oceanography

DOI: 10.25283/2223-4594-2018-3-31-41

UDC: 551.46

The article was received on: 17.05.2018

Keywords: White sea, saturation of water with oxygen, regression analysis, chlorophyll-a

Bibliographic description: Netsvetaeva O.P., Korobov V.B., Makedonskaya I.Y., Zmetnaya M.I. Dependence of oxygen saturation on the a chlorophyll content in the surface layer of the White Sea. Arctic: ecology and economy, 2018, no. 3(31), pp. 31-41. DOI: 10.25283/2223-4594-2018-3-31-41. (In Russian).


ANNOTATION:

The paper attempts to reveal the relationship between oxygen saturation and the “a” chlorophyll content in the surface layer of the White Sea, and the assumption was made that if the nature of such dependence had been found; the oxygen saturation index could be used in estimating the trophicity of the White Sea waters. The study was based on the initial data obtained during the surveys of the PINRO’s Northern Branch and the Northern UGMS in 2001-2014 (with the exception of 2009). Oxygen dissolved in the water was measured by Winkler method, the “a” chlorophyll content was determined in accordance with GOST 17.1.4.02-90 (spectrophotometry method). Seasonal maps of the distribution of indicators were made using the RBF-ML method by means of Surfer and specially developed “oxygen_interp_build” application. Mathematical data were processed with the aid of traditional statistical parameters of the IBM SPSS Statistics 21.0 software. The graphs were made using MS Excel 2016. The study showed that the oxygen saturation and “a” chlorophyll content in the surface layer of the White Sea had a tendency of a general decrease of parameters from spring to summer, and then to autumn. It is shown that, by reducing the number of correlation points by selecting the median oxygen saturation values for certain intervals of chlorophyll “a” values, it is possible to identify the relationship between the indicators considered. Thus, between the oxygen saturation and the content of chlorophyll “a” in the surface waters of the White Sea there is a positive relationship with the greatest closeness (r = 0.9516) with a chlorophyll “a” content of 1.0 μg/l. With further increase in its content, the tightness of the connection weakens (r = 0.1594 in the range of chlorophyll “a” of 1.1-2.5 μg/l).


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DOI 10.25283/2223-4594