Plum, Christoph; Gerhard, Miriam; Smykala, Mike: Log response ratio of observed versus expected growth rates of Antarctic phytoplankton in response to temperature and nitrogen:phosphorus supply interactions [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971327 (dataset in review), In: Plum, C et al.: Growth rate, carrying capacity and stoichiometry of Antarctic phytoplankton in response to temperature and nitrogen:phosphorus supply interactions [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.971329 (dataset in review)
Abstract:
Data were obtained from a laboratory growth experiment conducted from April to May 2021 at the Institute for Chemistry and Biology of the Marine Environment (University of Oldenburg). Three Antarctic phytoplankton species (Chaetoceros simplex, Phaeocystis antarctica (single cell culture) and Geminigera cryophila) were grown in monocultures and a mixture of all three species. We used a factorial design including four different N/P treatments (control plus three different N/P levels) and 10 different temperatures (-2, -1, 0, 1, 2, 3, 4, 6, 8 and 10°C). The detailed experimental setup is explained in doi:10.1594/PANGAEA.971329. In order to analyze whether the temperature and nutrient response of the mixed assemblage differs from expectations based on the monoculture performance, we calculated the log response ratio between the observed specific growth rate (µobs) of the mixed phytoplankton assemblage and the expected growth rate based on monocultures (µexp) as ln(µobs/µexp). Therefore we calculated an abundance weighted specific growth rate for the expected performance in the mixed assemblage (µexp) based on the monoculture performance as µexp = (a1*µ1) + (a2*µ2) + (a3*µ3) / (a1+a2+a3) where a is the abundance of each species at exponential growth in the mixed assemblage and µ is the specific growth rate of the corresponding monoculture. Positive deviations from 0 indicate higher observed growth in the mixed assemblage (µobs) than expected from monoculture performance (µexp).
Keyword(s):
Supplement to:
Smykala, Mike; Gerhard, Miriam; Plum, Christoph (submitted): Nutrient-dependent thermal response in growth and stoichiometry of Antarctic phytoplankton. Limnology and Oceanography
Funding:
German Research Foundation (DFG), grant/award no. 442927665: Altered stoichiometry and species interactions in coastal Antarctic plankton communities under global climate change
Comment:
The experiment started at 2021-04-02T10:00 and ended at 2021-05-19T12:00 .
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Type of study | Study type | Plum, Christoph | |||
| 2 | Taxon/taxa | Taxa | Plum, Christoph | |||
| 3 | Treatment: temperature | T:temp | °C | Plum, Christoph | ||
| 4 | Treatment: Nitrogen/Phosphorus ratio | T:N/P | Plum, Christoph | molar N:P supply | ||
| 5 | Experimental treatment | Exp treat | Plum, Christoph | "P addition", "N addition", "N and P addition", Control | ||
| 6 | Treatment: nitrogen | T: N | µmol/l | Plum, Christoph | Nitrogen supply | |
| 7 | Treatment: phosphorus | T: P | µmol/l | Plum, Christoph | Phosphorus supply | |
| 8 | Replicate | Repl | Plum, Christoph | |||
| 9 | Expected growth rate, linear | µ exp | 1/day | Plum, Christoph | Calculated | specific growth rate |
| 10 | Observed growth rate, linear | µ obs | 1/day | Plum, Christoph | Calculated | specific growth rate |
| 11 | Log response ratio, observed versus expected growth rate, linear | LRR µ obs vs µ exp | Plum, Christoph | Calculated |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1048 data points