Ziveri, Patrizia; D'Amario, Barbara; Pérez-Mejías, Carlos; Grelaud, Michaël; Pitta, Paraskevi; Krasakopoulou, Evangelia; Paraskevi, Pitta: Coccolithophore abundances and CaCO3 concentrations during the 2013 MedSeA mesocosm experiment [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.920843 (dataset in review)
Abstract:
Mesocosm experiments have been fundamental to investigate the effects of elevated CO2 and ocean acidification (OA) on planktic communities. However, few of these experiments have been conducted using naturally nutrient-limited waters and/or considering the combined effects of OA and ocean warming (OW). Coccolithophores are a group of calcifying phytoplankton that can reach high abundances in the Mediterranean Sea, and whose responses to OA are modulated by temperature and nutrients. We present the results of the first land-based mesocosm experiment testing the effects of combined OA and OW on an oligotrophic Eastern Mediterranean coccolithophore community. Coccolithophore cell abundance drastically decreased under OW and combined OA and OW (greenhouse, GH) conditions. Emiliania huxleyi calcite mass decreased consistently only in the GH treatment; moreover, anomalous calcifications (i.e. coccolith malformations) were particularly common in the perturbed treatments, especially under OA. Overall, these data suggest that the projected increase in sea surface temperatures, including marine heatwaves, will cause rapid changes in Eastern Mediterranean coccolithophore communities, and that these effects will be exacerbated by OA.
Supplement to:
D'Amario, Barbara; Pérez-Mejías, Carlos; Grelaud, Michaël; Paraskevi, Pitta; Krasakopoulou, Evangelia; Ziveri, Patrizia (2020): Coccolithophore community response to ocean acidification and warming in the Eastern Mediterranean Sea: results from a mesocosm experiment. Scientific Reports, 10, 12637, https://doi.org/10.1038/s41598-020-69519-5
Project(s):
Funding:
Seventh Framework Programme (FP7), grant/award no. 265103: Mediterranean Sea Acidification in a Changing Climate
Coverage:
Date/Time Start: 2013-09-01T00:00:00 * Date/Time End: 2013-09-12T00:00:00
Event(s):
Comment:
Experimental treatment (Exp trtm),
C: Control mesocosms (ambient temperature and present day pCO2),
OA: acidified mesocosms (ambient temperature, predicted for year 2100 pCO2) ,
W: heated water mesocosms (temperature: ambient plus 3oC, present day pCO2),
GH: green house mesocosms (temperature: ambient plus 3oC, pCO2: predicted for year 2100), 1,2,3: 3 replicates (Exp trtm)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Ziveri, Patrizia | Geocode | ||
| 2 | Day of experiment | DOE | day | Paraskevi, Pitta | ||
| 3 | Treatment | Treat | Paraskevi, Pitta | |||
| 4 | Experimental treatment | Exp treat | Paraskevi, Pitta | |||
| 5 | Calcium carbonate, particulate | CaCO3 part | µg/l | Ziveri, Patrizia | ||
| 6 | Coccolithophores | Coccolithophores | #/l | Ziveri, Patrizia | Counted | Total |
| 7 | Emiliania huxleyi | E. huxleyi | #/l | Ziveri, Patrizia | Counted | |
| 8 | Rhabdosphaera clavigera | R. clavigera | #/l | Ziveri, Patrizia | Counted | |
| 9 | Syracosphaera spp. | Syracosphaera spp. | #/l | Ziveri, Patrizia | Counted | |
| 10 | Gephyrocapsa muellerae | G. muellerae | #/l | Ziveri, Patrizia | Counted | |
| 11 | Umbellosphaera spp. | Umbellosphaera spp. | #/l | Ziveri, Patrizia | Counted | |
| 12 | Holococcolithophora spp. | Holococcolithophora spp. | #/l | Ziveri, Patrizia | Counted | |
| 13 | Emiliania huxleyi, mass | E. huxleyi m | pg | Ziveri, Patrizia | Measured and/or detected by SYRACO software | Emiliania huxleyi coccosphere mass |
| 14 | Emiliania huxleyi | E. huxleyi | % | Ziveri, Patrizia | Calculated | Malformed (Percentage with respect to the total number of E. huxleyi coccospheres identified by SEM) |
| 15 | Rhabdosphaera clavigera | R. clavigera | % | Ziveri, Patrizia | Calculated | Malformed (Percentage with respect to the total number of R. clavigera coccospheres identified by SEM ) |
| 16 | Syracosphaera molischii | S. molischii | % | Ziveri, Patrizia | Calculated | Malformed (Percentage with respect to the total number of S. molischii coccospheres identified by SEM) |
| 17 | Syracosphaera pulchra | S. pulchra | % | Ziveri, Patrizia | Calculated | Malformed (Percentage with respect to the total number of S. pulchra coccospheres identified by SEM) |
| 18 | Holococcolithophora spp. | Holococcolithophora spp. | % | Ziveri, Patrizia | Calculated | Malformed (Percentage with respect to the total number of HOL identified by SEM) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
1007 data points