ASSESSMENT OF THE INPUT OF PHOSPHORUS AND NITROGEN COMPOUNDS INTO THE GULF OF FINLAND THROUGH TRIBUTARIES OF THE NEVA RIVER WITHIN THE BORDERS OF ST. PETERSBURG
Abstract
The article is devoted to the actual problem of eutrophication of the eastern part of the Baltic Sea. The paper provides a general analysis of the intake of phosphorus and nitrogen compounds from the territory of the Russian Federation to the Gulf of Finland. Chemical analysis of water samples from the main tributaries and small watercourses of the Neva River delta within the borders of St. Petersburg was also carried out. Such watercourses as Okhta, Lubya, Okkervil, Slavyanka, Murzinka, Chernaya Rechka, Smolenka, Volkovka and Karpovka were studied. The concentrations of phosphates, ammonium and nitrate nitrogen were determined by spectrophotometry. Conclusions about the contribution of individual tributaries of the Neva River to the total inputs of biogenic elements into the Gulf of Finland were made. It is noted that the greatest contribution to the supply of biogenic elements is made by Okhta River and Slavyanka River.
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References
Kabel, K. Impact of climate change on the Baltic Sea ecosystem over the past 1,000 years / Kabel, K., Moros, M., Porsche, C. et al. Nat. Clim. Chang. 2, 2012, 871–874. doi: 10.1038/nclimate1595
Conley, D. J. Hypoxia-related processes in the Baltic Sea. Environ / Conley, D. J., Björck, S., Bonsdorff, E. et al. Sci. Technol. 43, 2009, 3412–3420. doi: 10.1021/es802762a
Gustafsson, B. G. Reconstructing the development of Baltic Sea eutrophication 1850–2006 / Gustafsson, B. G., Schenk, F., Blenckner, T. et al. Ambio 41, 2012, 534–548. doi: 10.1007/s13280-012-0318-x
Vahtera, E. Internal ecosystem feedbacks enhance nitrogen-fixing cyanobacteria blooms and complicate management in the Baltic Sea / Vahtera, E., Conley, D. J., Gustafsson, B. G. et al. Ambio 36, 2007, 186–194. doi: 10.1579/0044-7447(2007)36[186:IEFENC]2.0.CO;2
HELCOM 2019. Results of the 40th meeting Protection Commission of the Marine Envi-ronment of the Baltic Sea Region (HELCOM 40/2019).
Report on the environmental situation in St. Petersburg in 2019. St.Petersburg 2020, P. 179. [in Russian]
Golubkov S. Ecosystem changes in the neva estuary (baltic sea): Natural dynamics or response to anthropogenic impacts? / Golubkov, S., & Alimov, A. // Marine Pollution Bulletin, 61(4-6), 2010, 198-204. doi:10.1016/j.marpolbul.2010.02.014
Berezina, N. A. An integrated approach to the assessment of the eastern gulf of finland health: A case study of coastal habitats / Berezina, N. A., Gubelit, Y. I., Polyak, Y. M. et al. // Journal of Marine Systems, 171, 2017, 159-171. doi:10.1016/j.jmarsys.2016.08.013
Knuuttila, S. Nutrient inputs into the gulf of finland: Trends and water protection targets / Knuuttila, S., Räike, A., Ekholm, P. et al. // Journal of Marine Systems, 171, 2017, 54-64. doi:10.1016/j.jmarsys.2016.09.008
ISO 5667-6:2014 Water quality — Water quality — Sampling — Part 6: Guidance on sampling of rivers and streams
ISO 6878:2004 Water quality – Determination of phosphorus – Ammonium molybdate spectrometric method.
GOST 33045-2014 (State Standard) Water. Methods for determination of nitrogen-containing matters [in Russian].