Effects of sea ice on Baltic Sea eutrophication

Pärn, O, Duteil, O, Garcia-Gorriz, E, Ferreira-Cordeiro, N, Lessin, G, Macias, DM, Miladinova, S, Piroddi, C, Polimene, L, Serpetti, N and Stips, A 2024 Effects of sea ice on Baltic Sea eutrophication. Marine Pollution Bulletin, 209. 117067. https://doi.org/10.1016/j.marpolbul.2024.117067

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Official URL: http://dx.doi.org/10.1016/j.marpolbul.2024.117067

Abstract/Summary

This study investigates the influence of sea ice on eutrophication in the Baltic Sea ecosystem by comparing simulations from 1953 to 2017, with ice and without ice cover. We assessed the impact from ice cover by using eutrophication indicators defined by the Marine Strategy Framework Directive (MSFD), the Dia/Dino index and the newly proposed Trophic Transfer Index (TTI). Five out of six indicators suggest a negative impact of sea ice on the eutrophication status of the Baltic Sea, with a marked increase in ice impact observed in the early 1970s, followed by a decline in the late 1980s. The linear correlation between ice impact on MSFD indicators and nutrient loads suggests that the influence of ice becomes more pronounced under conditions of elevated nutrient loads. Around 1988, both the TTI and Dia/Dino index indicate eutrophication amplification, with ice cover significantly impacting both indicators (approximately 30 %), leading to a shift towards dinoflagellate domi�nance. While ice influences plankton timing and ecosystem structure, nutrient loads remain the primary driver of the timing of spring and summer blooms. According to our study the reduction in sea ice cover due to climate change, could contribute to the faster achievement of the Baltic Sea’s Good Environmental Status

Item Type: Publication - Article
Additional Keywords: Eutrophication indicators Impact of sea ice on eutrophication Effects of anthropogenic pressure Trophic transfer index Dia/Dino index Baltic sea ecosystem Nutrient dynamics
Divisions: Plymouth Marine Laboratory > Science Areas > Marine System Modelling
Depositing User: S Hawkins
Date made live: 01 Nov 2024 15:33
Last Modified: 01 Nov 2024 15:33
URI: https://plymsea.ac.uk/id/eprint/10315

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