Impact of temperature and species interaction on filamentous cyanobacteria may be more important than salinity and increased pCO2 levels

A future business-as-usual scenario (A1FI) was tested on two bloom-forming cyanobacteria of the Baltic Proper, Nodularia spumigena and Aphanizomenon sp., growing separately and together. The projected scenario was tested in two laboratory experiments where (a) interactive effects of increased temper...

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Bibliographic Details
Main Authors: Karlberg, Maria, Wulff, Angela
Format: Dataset
Language:English
Published: PANGAEA 2013
Subjects:
Alkalinity
total
Aphanizomenon sp.
Bacteria
Baltic Sea
Bicarbonate ion
Biovolume
Bottles or small containers/Aquaria (<20 L)
Calculated using CO2SYS
Carbonate ion
Carbon dioxide
Cyanobacteria
Growth/Morphology
Laboratory experiment
Laboratory strains
Maximum photochemical quantum yield of photosystem II
Nodularia spumigena
OA-ICC
Ocean Acidification International Coordination Centre
Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)
Pelagos
pH
Phytoplankton
Potentiometric
Potentiometric titration
Primary production/Photosynthesis
Salinity
Single species
Temperature
water
Time point
descriptive
Treatment
Ocean acidification
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.829881
https://doi.org/10.1594/PANGAEA.829881
Description
Summary:A future business-as-usual scenario (A1FI) was tested on two bloom-forming cyanobacteria of the Baltic Proper, Nodularia spumigena and Aphanizomenon sp., growing separately and together. The projected scenario was tested in two laboratory experiments where (a) interactive effects of increased temperature and decreased salinity and (b) interactive effects of increased temperature and elevated levels of pCO2 were tested. Increased temperature, from 12 to 16 °C, had a positive effect on the biovolume and photosynthetic activity (F v/F m) of both species. Compared when growing separately, the biovolume of each species was lower when grown together. Decreased salinity, from 7 to 4, and elevated levels of pCO2, from 380 to 960 ppm, had no effect on the biovolume, but on F v/F m of N. spumigena with higher F v/F m in salinity 7. Our results suggest that the projected A1FI scenario might be beneficial for the two species dominating the extensive summer blooms in the Baltic Proper. However, our results further stress the importance of studying interactions between species.

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