Lamb, Eric G; Han, Sukkyun; Lanoil, Brian D; Henry, Gregory HR; Brummell, Martin E; Banerjee, Samiran; Siciliano, Steven D (2011): (Supplemental Table 2) Plant characteristics, GHG fluxes, and soil chemical and microbial properties in experimental treatments in Alexandra Fiord [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.815197, Supplement to: Lamb, EG et al. (2011): A High Arctic soil ecosystem resists long-term environmental manipulations. Global Change Biology, 17(10), 3187-3194, https://doi.org/10.1111/j.1365-2486.2011.02431.x
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Abstract:
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 consumption or N2O cycling in any treatment. Thus, it appears that while warming and increased nutrient availability have strongly affected the plant community over the last 16 years, the belowground ecosystem has not yet responded. This resistance of the soil ecosystem has resulted in limited changes in GHG fluxes in response to the experimental treatments.
Project(s):
Coverage:
Latitude: 78.883300 * Longitude: -75.916700
Date/Time Start: 2009-07-15T00:00:00 * Date/Time End: 2009-07-15T00:00:00
Event(s):
Alexandra_Fiord_sites * Latitude: 78.883300 * Longitude: -75.916700 * Location: Ellesmere Island, Canadian Arctic Archipelago * Method/Device: Sampling by hand (HAND)
Comment:
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
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Experimental treatment | Exp treat | Lamb, Eric G | OTC = open top chamber, +Water = added water, Fx = amount of fertilizer added (x in g/m**2) | ||
| 2 | DATE/TIME | Date/Time | Geocode | |||
| 3 | Height | h | mm | Lamb, Eric G | of vegetation | |
| 4 | Standard deviation | Std dev | ± | Lamb, Eric G | vegetation height | |
| 5 | Number | No | Lamb, Eric G | vegetation cover [# of hits], including litter | ||
| 6 | Standard deviation | Std dev | ± | Lamb, Eric G | vegetation cover | |
| 7 | Carbon dioxide, flux | CO2 flux | µmol/m2/s | Lamb, Eric G | Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015) | |
| 8 | Carbon dioxide, standard deviation | CO2 std dev | ± | Lamb, Eric G | Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015) | |
| 9 | Methane, flux | CH4 flux | nmol/m2/s | Lamb, Eric G | Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015) | |
| 10 | Methane, standard deviation | CH4 std dev | ± | Lamb, Eric G | Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015) | |
| 11 | Nitrous oxide, flux | N2O flux | nmol/m2/s | Lamb, Eric G | Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015) | |
| 12 | Nitrous oxide, standard deviation | N2O std dev | ± | Lamb, Eric G | Fourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015) | |
| 13 | Ammonium | [NH4]+ | µg/kg | Lamb, Eric G | ||
| 14 | Ammonium, standard deviation | [NH4]+ std dev | ± | Lamb, Eric G | ||
| 15 | Nitrate | NO3 | mg/kg | Lamb, Eric G | ||
| 16 | Nitrate, standard deviation | NO3 std dev | ± | Lamb, Eric G | ||
| 17 | Phosphate | PO4 | mg/kg | Lamb, Eric G | ||
| 18 | Phosphate, standard deviation | [PO4]3- std dev | ± | Lamb, Eric G | ||
| 19 | Carbon, organic, total | TOC | mg/kg | Lamb, Eric G | soil C | |
| 20 | Carbon, organic, total, standard deviation | TOC std dev | ± | Lamb, Eric G | ||
| 21 | Nitrogen, organic, dissolved | DON | mg/kg | Lamb, Eric G | ||
| 22 | Nitrogen, organic, standard deviation | N org std dev | ± | Lamb, Eric G | ||
| 23 | Activation energy | Ea | kJ/mol | Lamb, Eric G | CO2 (carbon dioxide) | |
| 24 | Standard deviation | Std dev | ± | Lamb, Eric G | Ea CO2 | |
| 25 | Activation energy | Ea | kJ/mol | Lamb, Eric G | CH4 (methane) | |
| 26 | Standard deviation | Std dev | ± | Lamb, Eric G | Ea CH4 | |
| 27 | Activation energy | Ea | kJ/mol | Lamb, Eric G | N2O (nitrous oxide) | |
| 28 | Standard deviation | Std dev | ± | Lamb, Eric G | Ea N2O | |
| 29 | CrenamoA gene, copy number in sediment | CrenamoA | #/g | Lamb, Eric G | Denaturing gradient gel electrophoresis (DGGE) | crenarchaea |
| 30 | Standard deviation | Std dev | ± | Lamb, Eric G | Denaturing gradient gel electrophoresis (DGGE) | CrenamoA |
| 31 | amoA gene, copy number in sediment | amoA | #/g | Lamb, Eric G | Denaturing gradient gel electrophoresis (DGGE) | bacterial |
| 32 | Standard deviation | Std dev | ± | Lamb, Eric G | Denaturing gradient gel electrophoresis (DGGE) | amoA |
| 33 | Nitrous oxide reductase gene, copy number in sediment | nosZ | #/g | Lamb, Eric G | Denaturing gradient gel electrophoresis (DGGE) | |
| 34 | Standard deviation | Std dev | ± | Lamb, Eric G | Denaturing gradient gel electrophoresis (DGGE) | nosZ |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
264 data points