(Supplemental Table 2) Plant characteristics, GHG fluxes, and soil chemical and microbial properties in experimental treatments in Alexandra Fiord ...

• Main Authors: Lamb, Eric G, Han, Sukkyun, Lanoil, Brian D, Henry, Gregory HR, Brummell, Martin E, Banerjee, Samiran, Siciliano, Steven D
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Experimental treatment; DATE/TIME; Height; Standard deviation; Number; Carbon dioxide, flux; Carbon dioxide, standard deviation; Methane, flux; Methane, standard deviation; Nitrous oxide, flux; Nitrous oxide, standard deviation; Ammonium; Ammonium, standard deviation; Nitrate; Nitrate, standard deviation; Phosphate; Phosphate, standard deviation; Carbon, organic, total; Carbon, organic, total, standard deviation; Nitrogen, organic, dissolved; Nitrogen, organic, standard deviation; Activation energy; CrenamoA gene, copy number in sediment; amoA gene, copy number in sediment; Nitrous oxide reductase gene, copy number in sediment; Sampling by hand; Fourier transform infrared trace gas analyzer FTIR-TGA, Gasmet DX-4015; Denaturing gradient gel electrophoresis DGGE; International Polar Year 2007-2008 IPY; Alexandra Fiord; Arctic; Ellesmere Island; International Polar Year; IPY; Tundra
• Online Access: https://dx.doi.org/10.1594/pangaea.815197; https://doi.pangaea.de/10.1594/PANGAEA.815197

We evaluated above- and belowground ecosystem changes in a 16 year, combined fertilization and warming experiment in a High Arctic tundra deciduous shrub heath (Alexandra Fiord, Ellesmere Island, NU, Canada). Soil emissions of the three key greenhouse gases (GHGs) (carbon dioxide, methane, and nitrous oxide) were measured in mid-July 2009 using soil respiration chambers attached to a FTIR system. Soil chemical and biochemical properties including Q10 values for CO2, CH4, and N2O, Bacteria and Archaea assemblage composition, and the diversity and prevalence of key nitrogen cycling genes including bacterial amoA, crenarchaeal amoA, and nosZ were measured. Warming and fertilization caused strong increases in plant community cover and height but had limited effects on GHG fluxes and no substantial effect on soil chemistry or biochemistry. Similarly, there was a surprising lack of directional shifts in the soil microbial community as a whole or any change at all in microbial functional groups associated with CH4 ... : n=5 for all values except the Control treatment for CO2, CH4, and N2O where n=45. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...