Articles | Volume 16, issue 19
https://doi.org/10.5194/bg-16-3835-2019
https://doi.org/10.5194/bg-16-3835-2019
Research article
 | 
07 Oct 2019
Research article |  | 07 Oct 2019

Rapid environmental responses to climate-induced hydrographic changes in the Baltic Sea entrance

Laurie M. Charrieau, Karl Ljung, Frederik Schenk, Ute Daewel, Emma Kritzberg, and Helena L. Filipsson

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Cited articles

Alve, E.: Opportunistic features of the foraminifer Stainforthia fusiformis (Williamson): evidence from Frierfjord, Norway, J. Micropalaeontol., 13, 24–24, https://doi.org/10.1144/jm.13.1.24, 1994. 
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Appleby, P. G.: Chronostratigraphic techniques in recent sediments, in: Tracking Environmental Change Using Lake Sediments, edited by: Last, W. M. and Smol, J. P., Vol. 1, Springer Netherlands, 2001. 
Asteman, I. P. and Schönfeld, J.: Recent invasion of the foraminifer Nonionella stella Cushman & Moyer, 1930 in northern European waters: evidence from the Skagerrak and its fjords, J. Micropalaeontol., 35, 20–25, https://doi.org/10.1144/jmpaleo2015-007, 2016. 
Bergsten, H., Nordberg, K., and Malmgren, B.: Recent benthic foraminifera as tracers of water masses along a transect in the Skagerrak, North-Eastern North Sea, J. Sea Res., 35, 111–121, https://doi.org/10.1016/S1385-1101(96)90740-6, 1996. 
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We reconstructed environmental changes in the Öresund during the last 200 years, using foraminifera (microfossils), sediment, and climate data. Five zones were identified, reflecting oxygen, salinity, food content, and pollution levels for each period. The largest changes occurred ~ 1950, towards stronger currents. The foraminifera responded quickly (< 10 years) to the changes. Moreover, they did not rebound when the system returned to the previous pattern, but displayed a new equilibrium state.
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