Individual and interactive effects of warming and nitrogen supply on CO2 fluxes and carbon allocation in subarctic grassland

<p>We provide data (Data_all.xlsx) and the code for ecosystem productivity, soil respiration, carbon allocation in the shoot, root, soil, and microbes, and nitrogen and carbon&nbsp;availability in plant, soil, and microbes data. The measurements were made under soil warming gradient and under N fertilization treatment during the summer of 2018.</p> <p>The sheet &#39;13C_allocation&#39; contains data on excess ¹³C in the plant, soil, and soil respiration for days 1,3,6, and 10 days after ¹³CO₂ pulse labeling.&nbsp;</p> <p>The sheet &#39;primary productivity&#39; contains data on ecosystem fluxes (Gross primary productivity; &nbsp;Net ecosystem productivity and Dark respiration).</p> <p>The sheet &#39;SR&#39; contains data of soil respiration.</p> <p>The sheet &#39;dynamics.&#39; contains data of continuous measurements of soil respired CO₂ (SR), ¹³CO₂ (SR13C), soil water content(SWC), soil temperature (ST), and photosynthetic active radiation (PAR) and air temperature (Tair).</p> <p>The sheet &#39;Soil_N&#39; consists of dissolved organic N (TdN), NH₄, and NO₃ measured in soil. The sheet plant_N consists of N in plants. The microbial biomass carbon (MBC) and nitrogen (MBN) are provided in the sheet &#39;Microbial_Biomass&#39;</p> <p>The R file &#39;Script. R&#39; explains and plots the data. In addition, this R file also provides the script for time series regression analysis between response variables (soil-respired CO₂ and soil-respired ¹³CO₂) and environmental drivers (soil water content, soil temperature, and PAR), and provides the script for structural equation modeling (SEM) and linear mixed effects model and statistics.</p>