CWT-LTER Data Set Summary

Accession: 1213 CWT Research Theme: General Nutrient Chemistry
Contributors: Jennifer M. Fraterrigo, Corinne Block, Jennifer Knoepp, Katherine Elliott, Cindi Brown, Patsy Clinton, Neal Muldoon, Sheila Gregory, Carol Harper, Jason Meador
Title: Interactive effects of hemlock mortality and nitrogen availability on nutrient pools and fluxes in the southern Appalachian mountains from 2009 to 2011
Abstract: The impacts of exotic insects and pathogens on forest ecosystems are increasingly recognized, yet the factors influencing the magnitude of effects remain poorly understood. Eastern hemlock (Tsuga canadensis) exerts strong control on nitrogen (N) dynamics, and its loss due to infestation by the hemlock woolly adelgid (Adelges tsugae) is expected to affect nutrient dynamics in impacted stands. We evaluated the potential for variation in N availability to influence the magnitude of effects of hemlock decline on N and P dynamics in mixed hardwood stands. We measured N and P pools and fluxes at three elevations (low, mid, high) subjected to increasing atmospheric N deposition where hemlock was declining or absent (as reference) in western North Carolina. Specifically, this study was conducted at Coweeta Hydrologic Laboratory, a USDA Forest Service experimental forest in the southern Appalachian mountains of western North Carolina, USA from October 2009 to February 2011.
Key Words: atmospheric nitrogen deposition, biotic sinks, Coweeta Hydrologic Laboratory, Coweeta LTER, CWT, Disturbance Patterns, Movement of Inorganic Matter, exotic insects, exotic species impacts, hemlock, hemlock woolly adelgid, LTER, nitrogen, nitrogen deposition, nitrogen flux, North Carolina, Otto, pest outbreaks, phosphorus
LTER Core Area: Inorganic Fluxes
CWT Themes: General Nutrient Chemistry, Chemistry, Disturbance and Land Use, Plant Ecology, Population and System Dynamics
Study Type: Coweeta LTER / USDA FS Long Term Monitoring
Study Period: 24-Nov-2009 to 15-Feb-2011
Site References:
CWTBASIN -- Coweeta Basin, Macon County, North Carolina, USA
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Data Table: 1213 (Main data table for set 1213, 18)

Access: Public (released 30-Jan-2018)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Plot none alphanumeric string Numbered plots indicate which permanent plot they were located in or around
2 Elevation m floating-point Elevation of plot above sea level in meters
3 Vegetation_type none alphanumeric string Declining hemlock or reference
4 Elevation_class none alphanumeric string Is the elevation class low (698-716 m) mid (917-943), or high (1402-1433)?
5 NO3_N_deposition kg/ha floating-point Inorganic N deposition measured at rain gauges in the Coweeta basin; kg/ha/9months
6 NH4_N_deposition kg/ha floating-point Inorganic N deposition measured at rain gauges in the Coweeta basin; kg/ha/9months
7 0_10cm_soil_Percent_C % floating-point Percent carbon in 0-10 cm depth of soil
8 0_10cm_soil_Percent_N % floating-point Percent nitrogen in 0-10 cm depth of soil
9 0_10cm_soil_pH pH floating-point 0.01N CaCl2 solution was the method used to assess pH in the first 0-10 cm depth of soil
10 10_30cm_soil_Percent_C % floating-point Percent carbon in 10-30 cm depth of soil
11 10_30cm_soil_Percent_N % floating-point Percent nitrogen in 10-30 cm depth of soil
12 10_30cm_soil_pH pH floating-point 0.01N CaCl2 solution was the method used to assess pH in the first 10-30 cm depth of soil
13 SL_DRP_PO4_3_April_July_2010 kg/ha floating-point Dissolved reactive phosphorus; Measured with a surface lysimeter (at soil surface, under forest floor). Surface Lysimeters measured PO4 (DRP; dissolved reactive phosphorus) from April 2010- July 2010.; kg DRP/ha
14 SL_DRP_PO4_4_July_Oct_2010 kg/ha floating-point Dissolved reactive phosphorus; Measured with a surface lysimeter (at soil surface, under forest floor). Surface Lysimeters measured PO4 (DRP; dissolved reactive phosphorus) from July 2010- October 2010.; kg DRP/ha
15 SL_DRP_PO4_5_Oct_2010_Feb_2011 kg/ha floating-point Dissolved reactive phosphorus; Measured with a surface lysimeter (at soil surface, under forest floor). Surface Lysimeters measured PO4 (DRP; dissolved reactive phosphorus) from October 2010- February 2011.; kg DRP/ha
16 DL_DRP_PO4_3_April_July_2010 kg/ha floating-point Dissolved reactive phosphorus; Measured with a deep lysimeter (50 cm below soil surface). Deep Lysimeters measured PO4 (DRP; dissolved reactive phosphorus) from April 2010- July 2010.; kg DRP/ha
17 DL_DRP_PO4_4_July_Oct_2010 kg/ha floating-point Dissolved reactive phosphorus; Measured with a deep lysimeter (50 cm below soil surface). Deep Lysimeters measured PO4 (DRP; dissolved reactive phosphorus) from July 2010- October 2010; kg DRP/ha
18 DL_DRP_PO4_5_Oct_2010_Feb_2011 kg/ha floating-point Dissolved reactive phosphorus; Measured with a deep lysimeter (50 cm below soil surface). Deep Lysimeters measured PO4 (DRP; dissolved reactive phosphorus) from October 2010- February 2011.; kg DRP/ha
19 RB_NH4_3_April_July_2010 mg/g floating-point Ammonium was measured with a resin bag (nylon with 20g resin set in mineral soil below forest floor). The resin bag was used to measure NH4 from April 2010- July 2010; mg NH4/ 20g resin
20 RB_NH4_4_July_Oct_2010 mg/g floating-point Ammonium was measured with a resin bag (nylon with 20g resin set in mineral soil below forest floor). The resin bag was used to measure NH4 from July 2010- October 2010; mg NH4/ 20g resin
21 RB_NH4_5_Oct_2010_Feb_2011 mg/g floating-point Ammonium was measured with a resin bag (nylon with 20g resin set in mineral soil below forest floor). The resin bag was used to measure NH4 from October 2010- February 2011; mg NH4/ 20g resin
22 SL_NH4_3_April_July_2010 kg/ha floating-point Ammonium was measured with a surface lysimeter (at soil surface, under forest floor). Surface lysimeter was used to measure NH4 from April 2010- July 2010; kg NH4/ha
23 SL_NH4_4_July_Oct_2010 kg/ha floating-point Ammonium was measured with a surface lysimeter (at soil surface, under forest floor). Surface lysimeter was used to measure NH4 from July 2010- October 2010; kg NH4/ha
24 SL_NH4_5_Oct_2010_Feb_2011 kg/ha floating-point Ammonium was measured with a surface lysimeter (at soil surface, under forest floor). Surface lysimeter was used to measure NH4 from October 2010- February 2011; kg NH4/ha
25 DL_NH4_3_April_July_2010 kg/ha floating-point Ammonium was measured with a deep lysimeter (50 cm below soil surface). Deep lysimeter was used to measure NH4 from April 2010- July 2010 kg NH4/ha
26 DL_NH4_4_July_Oct_2010 kg/ha floating-point Ammonium was measured with a deep lysimeter (50 cm below soil surface). Deep lysimeter was used to measure NH4 from July 2010- October 2010; kg NH4/ha
27 DL_NH4_5_Oct_2010_Feb_2011 kg/ha floating-point Ammonium was measured with a deep lysimeter (50 cm below soil surface). Deep lysimeter was used to measure NH4 from October 2010- February 2011; kg NH4/ha
28 RB_NO3_3_April_July_2010 mg/g floating-point Nitrate was measured with a resin bag (nylon with 20g resin set in mineral soil below forest floor). Resin bags were used to measure NO3 from April 2010- July 2010; mg NO3/ 20g resin
29 RB_NO3_4_July_Oct_2010 mg/g floating-point Nitrate was measured with a resin bag (nylon with 20g resin set in mineral soil below forest floor). Resin bags were used to measure NO3 from July 2010- October 2010; mg NO3/ 20g resin
30 RB_NO3_5_Oct_2010_Feb_2011 mg/g floating-point Nitrate was measured with a resin bag (nylon with 20g resin set in mineral soil below forest floor). Resin bags were used to measure NO3 from October 2010- February 2011; mg NO3/ 20g resin
31 SL_NO3_3_April_July_2010 kg/ha floating-point Nitrate was measured with a surface lysimeter (at soil surface, under forest floor). Surface lysimeters were used to measure NO3 from April 2010- July 2010; kg NO3/ ha
32 SL_NO3_4_July_Oct_2010 kg/ha floating-point Nitrate was measured with a surface lysimeter (at soil surface, under forest floor). Surface lysimeters were used to measure NO3 from July 2010- October 2010; kg NO3/ ha
33 SL_NO3_5_Oct_2010_Feb_2011 kg/ha floating-point Nitrate was measured with a surface lysimeter (at soil surface, under forest floor). Surface lysimeters were used to measure NO3 from October 2010- February 2011; kg NO3/ ha
34 DL_NO3_3_April_July_2010 kg/ha floating-point Nitrate was measured with a deep lysimeter (50 cm below soil surface). Deep lysimeterswere used to measure NO3 from April 2010- July 2010; kg NO3/ ha
35 DL_NO3_4_July_Oct_2010 kg/ha floating-point Nitrate was measured with a deep lysimeter (50 cm below soil surface). Deep lysimeterswere used to measure NO3 from July 2010- October 2010; kg NO3/ ha
36 DL_NO3_5_Oct_2010_Feb_2011 kg/ha floating-point Nitrate was measured with a deep lysimeter (50 cm below soil surface). Deep lysimeters were used to measure NO3 from October 2010- February 2011; kg NO3/ ha
37 Oi_Percent_C % floating-point Forest floor Oi layer percent carbon
38 Oi_Percent_N % floating-point Forest floor Oi layer percent nitrogen
39 Oi_kg_C kg/ha floating-point Forest floor Oi layer carbon; kg C/ha
40 Oi_kg_N kg/ha floating-point Forest floor Oi layer nitrogen; kg N/ha
41 Oi_kg_P kg/ha floating-point Forest floor Oi layer phosphorus; kg P/ha
42 Oe_Percent_C % floating-point Forest floor Oe layer percent carbon
43 Oe_Percent_N % floating-point Forest floor Oe layer percent nitrogen
44 Oe_kg_C kg/ha floating-point Forest floor Oe layer carbon; kg C/ha
45 Oe_kg_N kg/ha floating-point Forest floor Oi layer nitrogen; kg N/ha
46 Oe_kg_P kg/ha floating-point Forest floor Oi layer phosphorus; kg P/ha
47 Oa_Percent_C % floating-point Forest floor Oi layer percent carbon
48 Oa_Percent_N % floating-point Forest floor Oi layer percent nitrogen
49 Oa_kg_C kg/ha floating-point Forest floor Oi layer carbon; kg C/ha
50 Oa_kg_N kg/ha floating-point Forest floor Oi layer nitrogen; kg N/ha
51 Oa_kg_P kg/ha floating-point ; kg P/haForest floor Oi layer phosphorus; kg P/ha
52 Wood_Percent_C % floating-point Forest floor wood percent carbon
53 Wood_Percent_N % floating-point Forest floor wood percent nitrogen
54 Wood_kg_C kg/ha floating-point Forest floor wood carbon; kg C/ha
55 Wood_kg_N kg/ha floating-point Forest floor nitrogen; kg N/ha
56 Wood_kg_P kg/ha floating-point Forest floor phosphorus; kg P/ha
57 FOL1_species none alphanumeric string Dominant overstory species #1
58 FOL1_DBH cm floating-point Total diameter at breast height (DBH) of dominant overstory species #1
59 FOL1_BA m^2 floating-point Total basal area (BA) of dominant overstory species #1 in square meters
60 FOL1_Percent_C % floating-point Percent carbon of dominant overstory species #1 foliage
61 FOL1_Percent_N % floating-point Percent carbon of dominant overstory species #1 foliage
62 FOL1_P µg/g floating-point Phosphorus in foliage of dominant overstory species #1 in micrograms/gram
63 FOL2_species none alphanumeric string Dominant overstory species #2
64 FOL2_DBH cm floating-point Total diameter at breast height (DBH) of dominant overstory species #2
65 FOL2_BA m^2 floating-point Total basal area (BA) of dominant overstory species #2 in square meters
66 FOL2_Percent_C % floating-point Percent carbon of dominant overstory species #2 foliage
67 FOL2_Percent_N % floating-point Percent nitrogen in foliage of dominant overstory species #2
68 FOL2_P µg/g floating-point Phosphorus in foliage of dominant overstory species #2 in micrograms/gram
69 FOL3_species none alphanumeric string Dominant overstory species #3
70 FOL3_DBH cm floating-point Total diameter at breast height (DBH) of dominant overstory species #3
71 FOL3_BA m^2 floating-point Total basal area (BA) of dominant overstory species #3 in square meters
72 FOL3_Percent_C % floating-point Percent carbon of dominant overstory species #3 foliage
73 FOL3_Percent_N % floating-point Percent nitrogen in foliage of dominant overstory species #2
74 FOL3_P µg/g floating-point Phosphorus in foliage of dominant overstory species #3 in micrograms/gram
75 DD_latitude decimal degrees floating-point Latitude in decimal degrees; Decimal degrees (-90 to 90)
76 DD_longitude decimal degrees floating-point Longitude in decimal degrees; Decimal degrees (-180 to 180)
77 0_10cm_NH4Cl kg/ha floating-point Psenner fraction 1 (exchangeable P, NH4Cl) at 0-10 cm depth; kg/ha; exchangeable fraction (PNH4Cl)
78 0_10cm_BD kg/ha floating-point Psenner fraction 2 (primarily iron-bound P, NaHCO3-Na2SO4) at 0-10 cm depth; kg/ha
79 0_10cm_NaOH25 kg/ha floating-point Psenner fraction 3 (aluminum, some iron hydroxides, and organic P, NaOH) at 0-10 cm depth; kg/ha
80 0_10cm_HCl kg/ha floating-point Psenner fraction 4 (apatite P, HCl) at 0-10 cm depth; kg/ha
81 0_10cm_NaOH85 kg/ha floating-point Psenner fractio 5 (refractory and residual P, NaOH) at 0-10 cm depth;kg/ha
82 10_30cm_NH4Cl kg/ha floating-point Psenner fraction 1 (exchangeable P, NH4Cl) at 10-30 cm depth; kg/ha
83 10_30cm_BD kg/ha floating-point Psenner fraction 2 (primarily iron-bound P, NaHCO3-Na2SO4) at 10-30 cm depth; kg/ha
84 10_30cm_NaOH25 kg/ha floating-point Psenner fraction 3 (aluminum, some iron hydroxides, and organic P, NaOH) at 10-30 cm depth; kg/ha
85 10_30cm_HCl kg/ha floating-point Psenner fraction 4 (apatite P, HCl) at 10-30 cm depth; kg/ha
86 10_30cm_NaOH85 kg/ha floating-point Psenner fraction 5 (refractory and residual P, NaOH) at 10-30 cm depth; kg/ha