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Deficiency syndromes in top predators associated with large-scale changes in the Baltic Sea ecosystem

Majaneva, Sanna and Fridolfsson, Emil and Casini, Michele and Legrand, Catherine and Lindehoff, Elin and Margonski, Piotr and Majaneva, Markus and Nilsson, Jonas and Rubene, Gunta and Wasmund, Norbert and Hylander, Samuel (2020). Deficiency syndromes in top predators associated with large-scale changes in the Baltic Sea ecosystem. PLoS ONE. 15 , e0227714 , 1-21
[Journal article]

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Abstract

Vitamin B-1 (thiamin) deficiency is an issue periodically affecting a wide range of taxa worldwide. In aquatic pelagic systems, thiamin is mainly produced by bacteria and phytoplankton and is transferred to fish and birds via zooplankton, but there is no general consensus on when or why this transfer is disrupted. We focus on the occurrence in salmon (Salmo salar) of a thiamin deficiency syndrome (M74), the incidence of which is highly correlated among populations derived from different spawning rivers. Here, we show that M74 in salmon is associated with certain large-scale abiotic changes in the main common feeding area of salmon in the southern Baltic Sea. Years with high M74 incidence were characterized by stagnant periods with relatively low salinity and phosphate and silicate concentrations but high total nitrogen. Consequently, there were major changes in phytoplankton and zooplankton, with, e.g., increased abundances of Cryptophyceae, Dinophyceae, Diatomophyceae and Euglenophyceae and Acartia spp. during high M74 incidence years. The prey fish communities also had increased stocks of both herring and sprat in these years. Overall, this suggests important changes in the entire food web structure and nutritional pathways in the common feeding period during high M74 incidence years. Previous research has emphasized the importance of the abundance of planktivorous fish for the occurrence of M74. By using this 27-year time series, we expand this analysis to the entire ecosystem and discuss potential mechanisms inducing thiamin deficiency in salmon.

Authors/Creators:Majaneva, Sanna and Fridolfsson, Emil and Casini, Michele and Legrand, Catherine and Lindehoff, Elin and Margonski, Piotr and Majaneva, Markus and Nilsson, Jonas and Rubene, Gunta and Wasmund, Norbert and Hylander, Samuel
Title:Deficiency syndromes in top predators associated with large-scale changes in the Baltic Sea ecosystem
Year of publishing :2020
Volume:15
Article number:e0227714
Number of Pages:21
Publisher:Public Library of Science
ISSN:1932-6203
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
URN:NBN:urn:nbn:se:slu:epsilon-p-107079
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107079
Additional ID:
Type of IDID
DOI10.1371/journal.pone.0227714
Web of Science (WoS)000534341100034
ID Code:17413
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:07 Sep 2020 09:40
Metadata Last Modified:07 Sep 2020 09:40

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