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Effect of ocean acidification on the structure and fatty acid composition of a natural plankton community in the Baltic Sea
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och botanik.ORCID-id: 0000-0001-9467-3035
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Antal upphovsmän: 62016 (Engelska)Ingår i: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 13, nr 24, s. 6625-6635Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Increasing atmospheric carbon dioxide (CO2) is changing seawater chemistry towards reduced pH, which affects various properties of marine organisms. Coastal and brackish water communities are expected to be less affected by ocean acidification (OA) as these communities are typically adapted to high fluctuations in CO2 and pH. Here we investigate the response of a coastal brackish water plankton community to increasing CO2 levels as projected for the coming decades and the end of this century in terms of community and biochemical fatty acid (FA) composition. A Baltic Sea plankton community was enclosed in a set of offshore mesocosms and subjected to a CO2 gradient ranging from natural concentrations (similar to 347 mu atm fCO(2)) up to values projected for the year 2100 (similar to 1333 mu atm fCO(2)). We show that the phytoplankton community composition was resilient to CO2 and did not diverge between the treatments. Seston FA composition was influenced by community composition, which in turn was driven by silicate and phosphate limitation in the mesocosms and showed no difference between the CO2 treatments. These results suggest that CO2 effects are dampened in coastal communities that already experience high natural fluctuations in pCO(2). Although this coastal plankton community was tolerant of high pCO(2) levels, hypoxia and CO2 uptake by the sea can aggravate acidification and may lead to pH changes outside the currently experienced range for coastal organisms.

Ort, förlag, år, upplaga, sidor
2016. Vol. 13, nr 24, s. 6625-6635
Nationell ämneskategori
Biologiska vetenskaper Geovetenskap och miljövetenskap
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URN: urn:nbn:se:su:diva-140420DOI: 10.5194/bg-13-6625-2016ISI: 000391624100002OAI: oai:DiVA.org:su-140420DiVA, id: diva2:1079375
Tillgänglig från: 2017-03-08 Skapad: 2017-03-08 Senast uppdaterad: 2019-12-04Bibliografiskt granskad

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Winder, Monika
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Institutionen för ekologi, miljö och botanik
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