CWT-LTER Data Set Summary

Accession: 1214 CWT Research Theme: Organic Matter/Decomposition
Contributors: Jennifer M. Fraterrigo, Jennifer Knoepp, Kelsey Ream
Title: Soil carbon cycling response to hemlock mortality at the Coweeta Hydrologic Laboratory
Abstract: We studied the impacts of hemlock mortality from infestation by the hemlock woolly adlegid (HWA) on soil carbon cycling at the Coweeta Hydrologic Laboratory. The HWA was first found at Coweeta in 2003. In 2013 and 2014, we re-sampled plots established in an earlier study by Elliott and others. There were 12 20 x 20 m plots: 4 were control hardwood stands, 4 were untreated hemlock communities, and 4 were hemlock that were girdled. We measured soil C and N concentration, soil delta 13 C, exoemzyme activities, root biomass, soil respiration, forest floor mass, and fungal hyphal biomass.
Key Words: biomass, Eastern Hemlock, Hemlock woolly adlegid, nitrogen content, root decomposition, soil carbon cycling, soil organic matter, soil respiration
LTER Core Area: Movement of Inorganic Matter, Movement of Organic Matter
CWT Themes: Organic Matter/Decomposition, General Nutrient Chemistry, Population and System Dynamics
Study Type: Coweeta Population and Community Ecology Study
Study Period: 01-Jun-2013 to 01-Aug-2015
Site References:
CWTBASIN -- Coweeta Basin, Macon County, North Carolina, USA
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Data Table: 1214_soil_carbon_cycling_response (Soil carbon cycling response to hemlock mortality, 12)

Access: Public (released 22-May-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

Column List:

Column Name Units Type Description (hide)
1 Plot none alphanumeric string plot identifier
2 Treatment none alphanumeric string treatment type
3 Year year integer year sample collected
4 Forest_floor_mass mg/ha floating-point Soil O-horizon (Oi + Oe Oa) mass
5 Soil_carbon_concentration_upper g/kg floating-point mineral soil C concentration at 0-10 cm depth
6 Soil_carbon_concentration_lower g/kg floating-point mineral soil C concentration at 10-30 cm depth
7 delta_13C_in_upper_soil Per mil floating-point mineral soil delta 13 C at 0-10 cm depth
8 delta_13C_in_lower_soil Per mil floating-point mineral soil delta 13 C at 10-30 cm depth
9 hyphal_biomass_upper kg/ha floating-point fungal hyphal biomass 0-10 cm
10 total_root_biomass mg/ha floating-point total root biomass at 0-10 cm depth
11 Soil_nitrogen_concentration _upper g/kg floating-point mineral soil N concentration at 0-10 cm depth
12 Soil_nitrogen_concentration _lower g/kg floating-point mineral soil N concentration at 10-30 cm depth
13 hyphal_biomass_lower kg/ha floating-point fungal hyphal biomass 10-30 cm
14 betaglucosidase_activity_upper µmol/g/hr floating-point BG exoenzyme activity 0-10 cm
15 B-1_4-N-acetylglucosaminidase_activity_upper µmol/g/hr floating-point NAG exoenzyme activity 0-10 cm
16 total_oxidative_ezyme_activity_upper µmol/g/hr floating-point Oxidative exoenzyme activity 0-10 cm (PPO + PER)
17 betaglucosidase_activity_lower µmol/g/hr floating-point BG exoenzyme activity 10-30 cm
18 B-1_4-N-acetylglucosaminidase_activity_lower µmol/g/hr floating-point BG exoenzyme activity 10-30 cm
19 total_oxidative_ezyme_activity_lower µmol/g/hr floating-point Oxidative exoenzyme activity 10-30 cm (PPO + PER)
20 Soil_respiration_July_2014 µmol/m^2/s floating-point Soil respiration measurements
21 Soil_respiration_August_2014 µmol/m^2/s floating-point Soil respiration measurements