Biogeosciences
Biogeosciences
BG
Articles | Volume 20, issue 23
Articles | Volume 20, issue 23
https://doi.org/10.5194/bg-20-4751-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-20-4751-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 23
Research article
 | 
30 Nov 2023
Research article |  | 30 Nov 2023

Marked recent declines in boron in Baltic Sea cod otoliths – a bellwether of incipient acidification in a vast hypoxic system?

Karin E. Limburg, Yvette Heimbrand, and Karol Kuliński

Viewed

Total article views: 3,444 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
2,072 1,049 323 3,444 521 457 408
  • HTML: 2,072
  • PDF: 1,049
  • XML: 323
  • Total: 3,444
  • Supplement: 521
  • BibTeX: 457
  • EndNote: 408
Views and downloads (calculated since 31 Mar 2023)
Cumulative views and downloads (calculated since 31 Mar 2023)

Viewed (geographical distribution)

Total article views: 3,444 (including HTML, PDF, and XML) Thereof 3,378 with geography defined and 66 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved (final revised paper)

Latest update: 03 Oct 2026
Download
Short summary
We found a 3-to-5-fold decline in boron in Baltic cod otoliths between the late 1990s and 2021. The trend correlates with declines in oxygen and pH but not with increased salinity. Otolith B : Ca correlated with phosphorus in a healthy out-group (Icelandic cod) but not in Baltic cod. The otolith biomarkers Mn : Mg (hypoxia proxy) and B : Ca in cod otoliths suggest a general increase in both hypoxia and acidification within Baltic intermediate and deep waters in the last decade.
Read more
Share
Special issue
Low-oxygen environments and deoxygenation in open and coastal...
Altmetrics
Final-revised paper
Preprint