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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):
International Polar Year (2007-2008) (IPY)
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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Experimental treatmentExp treatLamb, Eric GOTC = open top chamber, +Water = added water, Fx = amount of fertilizer added (x in g/m**2)
2 DATE/TIMEDate/TimeGeocode
3 HeighthmmLamb, Eric Gof vegetation
4 Standard deviationStd dev±Lamb, Eric Gvegetation height
5 NumberNoLamb, Eric Gvegetation cover [# of hits], including litter
6 Standard deviationStd dev±Lamb, Eric Gvegetation cover
7 Carbon dioxide, fluxCO2 fluxµmol/m2/sLamb, Eric GFourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015)
8 Carbon dioxide, standard deviationCO2 std dev±Lamb, Eric GFourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015)
9 Methane, fluxCH4 fluxnmol/m2/sLamb, Eric GFourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015)
10 Methane, standard deviationCH4 std dev±Lamb, Eric GFourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015)
11 Nitrous oxide, fluxN2O fluxnmol/m2/sLamb, Eric GFourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015)
12 Nitrous oxide, standard deviationN2O std dev±Lamb, Eric GFourier transform infrared trace gas analyzer (FTIR-TGA, Gasmet DX-4015)
13 Ammonium[NH4]+µg/kgLamb, Eric G
14 Ammonium, standard deviation[NH4]+ std dev±Lamb, Eric G
15 NitrateNO3mg/kgLamb, Eric G
16 Nitrate, standard deviationNO3 std dev±Lamb, Eric G
17 PhosphatePO4mg/kgLamb, Eric G
18 Phosphate, standard deviation[PO4]3- std dev±Lamb, Eric G
19 Carbon, organic, totalTOCmg/kgLamb, Eric Gsoil C
20 Carbon, organic, total, standard deviationTOC std dev±Lamb, Eric G
21 Nitrogen, organic, dissolvedDONmg/kgLamb, Eric G
22 Nitrogen, organic, standard deviationN org std dev±Lamb, Eric G
23 Activation energyEakJ/molLamb, Eric GCO2 (carbon dioxide)
24 Standard deviationStd dev±Lamb, Eric GEa CO2
25 Activation energyEakJ/molLamb, Eric GCH4 (methane)
26 Standard deviationStd dev±Lamb, Eric GEa CH4
27 Activation energyEakJ/molLamb, Eric GN2O (nitrous oxide)
28 Standard deviationStd dev±Lamb, Eric GEa N2O
29 CrenamoA gene, copy number in sedimentCrenamoA#/gLamb, Eric GDenaturing gradient gel electrophoresis (DGGE)crenarchaea
30 Standard deviationStd dev±Lamb, Eric GDenaturing gradient gel electrophoresis (DGGE)CrenamoA
31 amoA gene, copy number in sedimentamoA#/gLamb, Eric GDenaturing gradient gel electrophoresis (DGGE)bacterial
32 Standard deviationStd dev±Lamb, Eric GDenaturing gradient gel electrophoresis (DGGE)amoA
33 Nitrous oxide reductase gene, copy number in sedimentnosZ#/gLamb, Eric GDenaturing gradient gel electrophoresis (DGGE)
34 Standard deviationStd dev±Lamb, Eric GDenaturing gradient gel electrophoresis (DGGE)nosZ
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
264 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Exp treat
(OTC = open top chamber, +Wate...)		2 
Date/Time		3 
h [mm]
(of vegetation)		4 
Std dev [±]
(vegetation height)		5 
No
(vegetation cover [# of hits],...)		6 
Std dev [±]
(vegetation cover)		7 
CO2 flux [µmol/m2/s]
(Fourier transform infrared tr...)		8 
CO2 std dev [±]
(Fourier transform infrared tr...)		9 
CH4 flux [nmol/m2/s]
(Fourier transform infrared tr...)		10 
CH4 std dev [±]
(Fourier transform infrared tr...)		11 
N2O flux [nmol/m2/s]
(Fourier transform infrared tr...)		12 
N2O std dev [±]
(Fourier transform infrared tr...)		13 
[NH4]+ [µg/kg]		14 
[NH4]+ std dev [±]		15 
NO3 [mg/kg]		16 
NO3 std dev [±]		17 
PO4 [mg/kg]		18 
[PO4]3- std dev [±]		19 
TOC [mg/kg]
(soil C)		20 
TOC std dev [±]		21 
DON [mg/kg]		22 
N org std dev [±]		23 
Ea [kJ/mol]
(CO2 (carbon dioxide))		24 
Std dev [±]
(Ea CO2)		25 
Ea [kJ/mol]
(CH4 (methane))		26 
Std dev [±]
(Ea CH4)		27 
Ea [kJ/mol]
(N2O (nitrous oxide))		28 
Std dev [±]
(Ea N2O)		29 
CrenamoA [#/g]
(crenarchaea, Denaturing gradi...)		30 
Std dev [±]
(CrenamoA, Denaturing gradient...)		31 
amoA [#/g]
(bacterial, Denaturing gradien...)		32 
Std dev [±]
(amoA, Denaturing gradient gel...)		33 
nosZ [#/g]
(Denaturing gradient gel elect...)		34 
Std dev [±]
(nosZ, Denaturing gradient gel...)
Control2009-0779.9023.30117.432.31.270.85-0.2520.5910.692.61632106204026.6937.810.530.19268.93136.8532.7422.54196008030-63.02287.075.723.331150000235000102000559002030000432000
Warm (OTC), Control, F02009-0749.3020.10127.422.50.790.530.0270.301-0.171.41659206324023.7323.671.090.78303.86268.1637.6935.552490023000-138.16410.304.733.991390000871000879005030030200001610000
Control, +Water, F02009-0765.9040.70112.034.61.990.99-0.2200.3062.332.8511188016018054.7095.780.820.79397.58390.1454.0763.022290012800-500.79393.443.461.8213800001180000583001910054100002650000
Control, +Water, F102009-0756.9041.10140.621.91.350.651.0201.590-2.297.00894707599037.9841.140.720.34390.95222.1648.6435.782580010300-359.79615.475.535.04125000052700011400056000927000011800000
Control, +Water, F502009-0774.0019.90142.436.61.531.57-0.1940.4212.862.40387302205013.1311.810.570.24202.1880.8123.6610.81156004660-383.40650.293.012.081240000697000856004120033200001780000
Warm (OTC), +Water, F02009-0734.0031.30129.038.91.200.75-0.2660.4920.741.02443202635015.3412.730.430.08219.0268.4326.0812.88205007850-123.79264.823.822.06874000592000640004150019900001210000
Warm (OTC), +Water, F102009-0773.6021.80168.846.41.520.970.1180.2580.092.27385101931010.3310.680.610.30219.9857.4124.688.90151001150027.25269.283.121.851180000636000872007720052900005860000
Warm (OTC), +Water, F502009-07100.3527.08199.654.92.021.23-0.7571.1601.121.26666205162022.0719.060.710.40319.80217.6940.7431.5417700925051.5734.493.650.80911000417000530003210035700001630000