Model estimates of interannual variability of the Lake Ladoga ecosystem characteristics in the period from 1980 to 2020
https://doi.org/10.59887/2073-6673.2024.17(4)-2
Abstract
Numerous generalizations based on field studies show that the spatiotemporal coverage of Lake Ladoga with observational data is insufficient for a reliable quantitative assessment of the interannual variability of the characteristics and biogeochemical fluxes in the lake ecosystem. This paper presents estimates of the interannual dynamics of the main ecosystem characteristics and biogeochemical fluxes in the lake for the period from 1980 to 2020, obtained using a verified three-dimensional eco-hydrodynamic model of Lake Ladoga. The features of the lake ecosystem response to a 39 % decrease in the external phosphorus load during the study period, which is accompanied by a decrease in phytoplankton biomass and primary production by only 30 %, are revealed. The main mechanism explaining this response of the reservoir ecosystem is an increase in the recycling rate due to an increase in water temperature in the photic layer during the growing season, caused by climate change. The phosphorus turnover time in the lake was estimated to be approximately 5.4 years for the considered period of 1980–2020.
Keywords
Supporting agencies: The research was supported by grants from the Russian Science Foundation (Project No. 23-17-20010) and the St. Petersburg Science Foundation (Project No. 23-17-20010).
About the Authors
A. V. Isaev
Shirshov Institute of Oceanology, Russian Academy of Sciences
Russian Federation
Russian Federation
36 Nakhimovsky Prosp., Moscow 117997
V. A. Ryabchenko
Shirshov Institute of Oceanology, Russian Academy of Sciences
Russian Federation
Russian Federation
36 Nakhimovsky Prosp., Moscow 117997
References
1. Ladoga / Ed. by V.A. Rumiantsev, S.A. Kondratev. SPb.: Nestor-History; 2013, 468 p. (In Russian).
2. Current state and problems of anthropogenic transformation of the ecosystem of Lake Ladoga in a changing climate / Ed. by S.A. Kondratev, Sh.R. Pozdniakov, V.A. Rumiantsev. Moskva: RAS; 2021. 640 p. (In Russian).
3. Pozdnyakov Sh.R., Kondratyev S.A., Rasulova A.M. et.al. Lake Ladoga is a geostrategic water body in the North-West of Russia and its zone of environmental risk. Hydrometeorology and Ecology. 2021;62:139–161 (In Russian).
4. Petrova N.A., Antonov S.E., Protopopova E.B. Structural and functional characteristics of phytoplankton. Lake Ladoga: criteria for the state of the ecosystem / Ed. By N.A. Petrova, A. YU. Terzhevik. SPb., 1992. P. 119–145 (In Russian).
5. Pozdnyakov D.V., Korosov A.A., Petrova N.A. et.al. Investigation of a “Hysteretic” Nature of Lake Ladoga’s Coming Back from a Mesotrophic State. Issledovanie Zemlii z Kosmosa. 2009;1:45–49 (In Russian).
6. Letanskaya G.I., Protopopova E.V. The Current State of Phytoplankton in Lake Ladoga (2005–2009). Inland Water Biology. 2012;5(4):310–316 (In Russian).
7. Petrova N.A., Petrova T.N. Susareva O.M. et al. Specific features of Lake Ladoga ecosystem under the effect of anthropogenic eutrophication. Water Resources. 2010;37(5):674–683.
8. Menshutkin V.V., Vorobieva O.N. A model of the ecological system of Lake Ladoga. The current state of the ecosystem of Lake Ladoga. Ed. N.A. Petrova, G.F. Raspletina. Leningrad: Nauka; 1987. p. 187–200 (In Russian).
9. Rukhovets L.A., Astrakhantsev G.P., Menshutkin V.V. et al. Development of Lake Ladoga ecosystem models: modeling of the phytoplankton succession in the eutrophication process. I. Ecological Modelling. 2003;165(1):49–77. doi:10.1016/S0304-3800(03)00061-9
10. Astrakhantsev G.P., Menshutkin V.V., Petrova L.A. et al. Modeling ecosystems of large stratified lakes. SPb.: Nauka; 2003. 363 p. (In Russian).
11. Menshutkin V.V., Astrakhantsev G.P., Yegorova N.B. et.al. Mathematical modelling of the evolution and current conditions of the Ladoga Lake ecosystem. Ecological Modelling. 1998;107:1–24. doi:10.1016/S0304-3800(97)00184-1
12. Rukhovets L., Filatov N. Ladoga and Onego — Great European Lakes: Observations and modeling / Berlin Heidelberg: Springer-Verlag; 2010. doi:10.1007/978-3-540-68145-8
13. Isaev A.V., Ryabchenko V.A., Konik A.A. Reproduction of the Current Climatic State of the Lake Ladoga Ecosystem. Fundamental and Appled Hydrophysics. 2024;17(2):50–65. doi:10.59887/2073-6673.2024.17(2)-5
14. Marshall J., Adcrof A., Hill C., et al. A finite-volume, incompressible Navier Stokes model for studies of the ocean on parallel computers. Journal of Geophysical Research: Oceans. 1997;102(C3):5753–5766. doi:10.1029/96JC02775
15. Marshall J., Hill C., Perelman L., et al. Hydrostatic, quasi-hydrostatic, and nonhydrostatic ocean modeling. Journal of Geophysical Research: Oceans. 1997;102(C3):5733–5752. doi:10.1029/96JC02776
16. Savchuk O.P. Nutrient biogeochemical cycles in the Gulf of Riga: scaling up field studies with a mathematical model. Journal of Marine Systems. 2002;32(4):253–280. doi:10.1016/S0924-7963(02)00039-8
17. Isaev A.V., Savchuk O.P., Filatov N.N. Three-Dimensional Hindcast of Nitrogen and Phosphorus Biogeochemical Dynamics in Lake Onego Ecosystem, 1985–2015. Part I: Long-Term Dynamics and Spatial Distribution. Fundamental and Applied Hydrophysics. 2022;15(2):76–97. doi:10.48612/fpg/e1m2-63b5-rhvg
18. Savchuk O.P., Isaev A.V., Filatov N.N. Three-Dimensional Hindcast of Nitrogen and Phosphorus Biogeochemical Dynamics in Lake Onego Ecosystem, 1985–2015. Part II: Seasonal Dynamics and Spatial Features; Integral Fluxes. Fundamental and Applied Hydrophysics. 2022;15(2): 98–109. doi:10.48612/fpg/9mg5-run6-4zr8
19. Sterner R.W., Elser J.J. Ecological stoichiometry: The biology of elements from molecules to the biosphere. Princeton University Press; 2002. 464 p.
20. Reynolds C.S. The ecology of phytoplankton. Cambridge: Cambridge University Press; 2006. doi:10.1017/CBO9780511542145
21. Sterner R.W., Andersen T., Elser J.J. et al. Scale-dependent carbon: nitrogen: phosphorus seston stoichiometry in marine and freshwaters. Limnology and Oceanography. 2008;53(3):1169–1180. doi:10.4319/lo.2008.53.3.1169
22. Sterner R. C: N: P stoichiometry in Lake Superior: freshwater sea as end member. Inland Waters. 2011;1(1):29–46. doi:10.5268/IW-1.1.365
23. Bergström A.-K., Karlsson J., Karlsson D. et al. Contrasting plankton stoichiometry and nutrient regeneration in northern arctic and boreal lakes. Aquatic Sciences. 2018;80(2):24. doi:10.1007/s00027-018-0575-2
24. Menden-Deuer S., Lessard E.J. Carbon to volume relationships for dinoflagellates, diatoms, and other protist plankton. Limnology and Oceanography. 2000;45(3):569–579. doi:10.4319/lo.2000.45.3.0569
Review
For citations:
Isaev A.V., Ryabchenko V.A. Model estimates of interannual variability of the Lake Ladoga ecosystem characteristics in the period from 1980 to 2020. Fundamental and Applied Hydrophysics. 2024;17(4):32-42. (In Russ.) https://doi.org/10.59887/2073-6673.2024.17(4)-2
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