Alterations in microbial community composition with increasing <i>f</i>CO<sub>2</sub>: a mesocosm study in the eastern Baltic Sea
- Crawfurd, K.J.
- Alvarez-Fernandez, S.
- Mojica, K.D.A.
- Riebesell, U.
- Brussaard, C.P.D.
DOIAbstract
Ocean acidification resulting from the uptake ofanthropogenic carbon dioxide (CO2) by the ocean is considereda major threat to marine ecosystems. Here we examinedthe effects of ocean acidification on microbial communitydynamics in the eastern Baltic Sea during the summerof 2012 when inorganic nitrogen and phosphorus werestrongly depleted. Large-volume in situ mesocosms wereemployed to mimic present, future and far future CO2 scenarios.All six groups of phytoplankton enumerated by flowcytometry (<20 μm cell diameter) showed distinct trends innet growth and abundance with CO2 enrichment. The picoeukaryoticphytoplankton groups Pico-I and Pico-II displayedenhanced abundances, whilst Pico-III, Synechococcusand the nanoeukaryotic phytoplankton gr...
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