Data for manuscript 'Ocean acidification of a coastal Antarctic marine microbial community reveals a critical threshold for CO2 tolerance in phytoplankton productivity'

This data set was collected from a ocean acidification minicosm experiment performed at Davis Station, Antarctica during the 2014/15 summer season. It includes:- description of methods for all data collection and analyses.- marine microbial community data; Chlorophyll a concentration, particulate organic matter concentration (carbon and nitrogen), bacterial cell abundance.- phytoplankton primary productivity data; 14C-sodium bicarbonate incorporation raw data (decays per minute: DPM) and modelled productivity from photosynthesis versus irradiance (PE) curves, O2-evolution derived net community productivity, respiration, and gross primary productivity.- phytoplankton photophysiology data; community photosynthetic efficiency from PAM measurements (maximum quantum yield of PSII: Fv/Fm), PAM steady state light curve data and derived non-photochemical quenching of Chl a fluorescence (NPQ), relative electron transport rates (rETR), and effective quantum yield of PSII (delta F/Fm').- phytoplankton carbon concentrating mechanism (CCM) data; maximum quantum yield of PSII (Fv/Fm) and effective quantum yield of PSII (∆F/Fm') from PAM measurements on size-fractionated phytoplankton samples (less than 10 microns and greater than 10 microns cells) exposed to; ethoxzolamide (EZA) which inhibits both intracellular carbonic anhydrase (iCA) and extracellular carbonic anhydrase (eCA), acetazolamide (AZA), which blocks eCA only, and a control (no inhibitor) sample. - bacterial productivity data; 14C-Leucine incorporation raw data (decays per minute: DPM) and calculated productivity.

本数据集采集自2014/2015夏季于南极戴维斯站（Davis Station）开展的海洋酸化微型生态系统（minicosm）实验。数据集包含以下内容：
- 所有数据采集与分析方法的详细说明；
- 海洋微生物群落数据：包括叶绿素a（Chlorophyll a）浓度、颗粒有机质（particulate organic matter）浓度（碳、氮组分）以及细菌细胞丰度；
- 浮游植物初级生产力数据：¹⁴C-碳酸氢钠（¹⁴C-sodium bicarbonate）掺入原始数据（每分钟衰变数：DPM）、基于光合-光响应（photosynthesis versus irradiance, PE）曲线得到的模型模拟生产力，以及由溶氧（O₂）演化衍生的群落净生产力、呼吸速率与总初级生产力；
- 浮游植物光生理数据：通过脉冲振幅调制（Pulse-Amplitude Modulation, PAM）测量获得的群落光合效率（光系统II最大量子产额Fv/Fm）、PAM稳态光曲线数据，以及衍生的叶绿素a荧光非光化学淬灭（NPQ，non-photochemical quenching）、相对电子传递速率（rETR，relative electron transport rates）与光系统II有效量子产额（ΔF/Fm'）；
- 浮游植物碳浓缩机制（CCM，carbon concentrating mechanism）数据：针对分级分离的浮游植物样本（<10μm与>10μm细胞），分别在暴露于乙唑酰胺（EZA，ethoxzolamide，可同时抑制胞内碳酸酐酶iCA与胞外碳酸酐酶eCA）、乙酰唑胺（AZA，acetazolamide，仅阻断胞外碳酸酐酶）以及对照组（无抑制剂）条件下，通过PAM测量得到的光系统II最大量子产额（Fv/Fm）与有效量子产额（ΔF/Fm'）；
- 细菌生产力数据：¹⁴C-亮氨酸（¹⁴C-Leucine）掺入原始数据（每分钟衰变数：DPM）与计算得到的生产力数值。