Coccolithophores and calcite saturation state in the Baltic and Black Seas

Autor: Bernd Schneider, Toby Tyrrell, Anastasia Charalampopoulou, Ulf Riebesell
Přispěvatelé: National Oceanography Centre [Southampton] ( NOC ), University of Southampton [Southampton], Leibniz-Institut für Ostseeforschung Warnemünde ( IOW ), Leibniz-Institute of Marine Sciences, Leibniz-Institut für Meereswissenschaften ( IFM-GEOMAR ), EGU, Publication, National Oceanography Centre [Southampton] (NOC), University of Southampton, Leibniz-Institut für Ostseeforschung Warnemünde (IOW), Leibniz Association, Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR)
Rok vydání: 2008
Předmět:
[ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean
Atmosphere
0106 biological sciences
010504 meteorology & atmospheric sciences
Coccolithophore
lcsh:Life
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
engineering.material
[SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
[ PHYS.ASTR.CO ] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
01 natural sciences
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
chemistry.chemical_compound
lcsh:QH540-549.5
[ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces
environment
14. Life underwater
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
[ SDU.ASTR ] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Ecology
Evolution
Behavior and Systematics
0105 earth and related environmental sciences
Earth-Surface Processes
Emiliania huxleyi
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
Calcite
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]
Brackish water
biology
[SDU.OCEAN] Sciences of the Universe [physics]/Ocean
Atmosphere
010604 marine biology & hydrobiology
Aragonite
lcsh:QE1-996.5
[ SDU.STU ] Sciences of the Universe [physics]/Earth Sciences
Ocean acidification
biology.organism_classification
[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces
environment
lcsh:Geology
lcsh:QH501-531
Oceanography
chemistry
[PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]
13. Climate action
[SDU.STU] Sciences of the Universe [physics]/Earth Sciences
engineering
Seawater
lcsh:Ecology
Saturation (chemistry)
Geology
Zdroj: Biogeosciences
Biogeosciences, European Geosciences Union, 2008, 5 (2), pp.485-494
Biogeosciences (BG), 5 (2). pp. 485-494.
Biogeosciences (BG), 5 . pp. 485-494.
Biogeosciences Discussions
Biogeosciences Discussions, European Geosciences Union, 2007, 4 (5), pp.3581-3605
Biogeosciences, Vol 5, Iss 2, Pp 485-494 (2008)
ISSN: 1726-4189
1726-4170
1810-6277
1810-6285
DOI: 10.5194/bg-5-485-2008
Popis: The Baltic and Black Seas are both brackish, that is to say both have salinities intermediate between freshwater and seawater. The coccolithophore Emiliania huxleyi is abundant in one, the Black Sea, but absent from the other, the Baltic Sea. Here we present summertime coccolithophore measurements confirming this difference, as well as data on the calcium carbonate saturation state of the Baltic Sea. We find that the Baltic Sea becomes undersaturated (or nearly so) in winter, with respect to both the aragonite and calcite mineral forms of CaCO3. Data for the Black Sea are more limited, but it appears to remain strongly supersaturated year-round. The absence of E. huxleyi from the Baltic Sea could therefore potentially be explained by dissolution of their coccoliths in winter, suggesting that minimum annual (wintertime) saturation states could be most important in determining future ocean acidification impacts. In addition to this potential importance of winter saturation state, alternative explanations are also possible, either related to differences in salinity or else to differences in silicate concentrations.
Databáze: OpenAIRE
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