PANGAEA_971327
Log response ratio of observed versus expected growth rates of Antarctic phytoplankton in response to temperature and nitrogen:phosphorus supply interactions
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
2024-10-29
PANGAEA
Dataset
https://doi.pangaea.de/10.1594/PANGAEA.971327
Investigator
Christoph
Plum
c.plum@uni-oldenburg.de
Earth Science
Type of study
Taxon/taxa
Treatment: temperature
Treatment: nitrogen/phosphorus ratio
Experimental treatment
Treatment: nitrogen
Treatment: phosphorus
Replicate
Expected growth rate, linear
Observed growth rate, linear
Log response ratio, observed versus expected growth rate, linear
geoscientificInformation
Diatom
ecological stoichiometry
Geminigera cryophila
Laboratory experiment
Nitrogen
Phaeocystis antarctica
Phosphorus
Southern Ocean
Temperature
Calculated
Complete
unrestricted
CC-BY-4.0: Creative Commons Attribution 4.0 International
English
PANGAEA
Data Publisher for Earth & Environmental Science
https://www.pangaea.de/
Data Center Contact
Michael
Diepenbroek
info@pangaea.de
Leobener Str.
Bremen
Bremen
28359
Germany
online
1048 data points
text/tab-separated-values
Smykala, Mike; Gerhard, Miriam; Plum, Christoph (2025): Nutrient-dependent thermal response in growth and stoichiometry of Antarctic phytoplankton. Limnology and Oceanography, 70(6), 1709-1724, https://doi.org/10.1002/lno.70045
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). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.971327"! ** The experiment started at 2021-04-02T10:00 and ended at 2021-05-19T12:00 .
https://doi.org/10.1002/lno.70045
Nutrient-dependent thermal response in growth and stoichiometry of Antarctic phytoplankton
PANGAEA_971329
DIF
9.4
2024-10-29
2026-07-10